////  SRSlimeView//  @author  SR//  Modified by JunHan on 13-9-18.//#import <UIKit/UIKit.h>#define kStartTo    0.7f#define kEndTo      0.15f#define kAnimationInterval  (1.0f / 50.0f)NS_INLINE CGFloat distansBetween(CGPoint p1 , CGPoint p2) {    return sqrtf((p1.x - p2.x)*(p1.x - p2.x) + (p1.y - p2.y)*(p1.y - p2.y));}typedef enum {    SRSlimeStateNormal,    SRSlimeStateShortening,    SRSlimeStateMiss} SRSlimeState;@class SRSlimeView;@interface SRSlimeView : UIView@property (nonatomic, assign)   CGPoint startPoint, toPoint;@property (nonatomic, assign)   CGFloat viscous;    //default 55@property (nonatomic, assign)   CGFloat radius;     //default 13@property (nonatomic, assign)   CGFloat lineWith;@property (nonatomic, assign)   CGFloat shadowBlur;@property (nonatomic, strong)   UIColor *bodyColor, *skinColor;@property (nonatomic, strong)   UIColor *shadowColor;@property (nonatomic, assign)   SRSlimeState state;- (void)setPullApartTarget:(id)target action:(SEL)action;@end

////  SRSlimeView//  @author  SR//  Modified by JunHan on 13-9-18.//#import "SRSlimeView.h"#import <QuartzCore/QuartzCore.h>NS_INLINE CGPoint pointLineToArc(CGPoint center, CGPoint p2, float angle, CGFloat radius) {    float angleS = atan2f(p2.y - center.y, p2.x - center.x);    float angleT = angleS + angle;    float x = radius * cosf(angleT);    float y = radius * sinf(angleT);    return CGPointMake(x + center.x, y + center.y);}@implementation SRSlimeView {    __weak id  _target;    SEL _action;}- (id)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        self.backgroundColor = [UIColor clearColor];        _toPoint = _startPoint = CGPointMake(frame.size.width / 2,                                             frame.size.height / 2);        _viscous = 45.0f; // 拉扯长度        _radius = 17.0f;  // 拉扯物体半径        _bodyColor = [[UIColor grayColor] colorWithAlphaComponent:0.45f];        _skinColor = [[UIColor blackColor] colorWithAlphaComponent:0.12f];        _lineWith = 1.0;        _shadowBlur = 4;        _shadowColor = [[UIColor grayColor] colorWithAlphaComponent:0.7f];    }    return self;}- (void)setLineWith:(CGFloat)lineWith{    _lineWith = lineWith;    [self setNeedsDisplay];}- (void)setStartPoint:(CGPoint)startPoint{    if (CGPointEqualToPoint(_startPoint, startPoint))        return;    if (_state == SRSlimeStateNormal) {        _startPoint = startPoint;        [self setNeedsDisplay];    }}- (void)setToPoint:(CGPoint)toPoint{    if (CGPointEqualToPoint(_toPoint, toPoint))        return;    if (_state == SRSlimeStateNormal) {        _toPoint = toPoint;        [self setNeedsDisplay];    }}- (UIBezierPath*)bodyPath:(CGFloat)startRadius end:(CGFloat)endRadius percent:(float)percent{    UIBezierPath *path = [[UIBezierPath alloc] init];    float angle1 = M_PI/3 + (M_PI/6) * percent;    CGPoint sp1 = pointLineToArc(_startPoint, _toPoint, angle1, startRadius),    sp2 = pointLineToArc(_startPoint, _toPoint, -angle1, startRadius),    ep1 = pointLineToArc(_toPoint, _startPoint, M_PI/2, endRadius),    ep2 = pointLineToArc(_toPoint, _startPoint, -M_PI/2, endRadius);#define kMiddleP  0.6    CGPoint mp1 = CGPointMake(sp2.x*kMiddleP + ep1.x*(1-kMiddleP), sp2.y*kMiddleP + ep1.y*(1-kMiddleP)),    mp2 = CGPointMake(sp1.x*kMiddleP + ep2.x*(1-kMiddleP), sp1.y*kMiddleP + ep2.y*(1-kMiddleP)),    mm = CGPointMake((mp1.x + mp2.x)/2, (mp1.y + mp2.y)/2);    float p = distansBetween(mp1, mp2) / 2 / endRadius * (0.9 + percent/10);    mp1 = CGPointMake((mp1.x - mm.x)/p + mm.x, (mp1.y - mm.y)/p + mm.y);    mp2 = CGPointMake((mp2.x - mm.x)/p + mm.x, (mp2.y - mm.y)/p + mm.y);    [path moveToPoint:sp1];    float angleS = atan2f(_toPoint.y - _startPoint.y,                          _toPoint.x - _startPoint.x);    [path addArcWithCenter:_startPoint                    radius:startRadius                startAngle:angleS + angle1                  endAngle:angleS + M_PI*2 - angle1                 clockwise:YES];        [path addQuadCurveToPoint:ep1                 controlPoint:mp1];    angleS = atan2f(_startPoint.y - _toPoint.y,                    _startPoint.x - _toPoint.x);    [path addArcWithCenter:_toPoint                    radius:endRadius                startAngle:angleS + M_PI/2                  endAngle:angleS + M_PI*3/2                 clockwise:YES];    [path addQuadCurveToPoint:sp1                 controlPoint:mp2];        return path;}- (void)drawRect:(CGRect)rect{    switch (_state) {        case SRSlimeStateNormal:        {            float percent = 1 - distansBetween(_startPoint , _toPoint) / _viscous;            if (percent == 1) {                CGContextRef context = UIGraphicsGetCurrentContext();                UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(_startPoint.x - _radius, _startPoint.y - _radius, 2*_radius, 2*_radius)                                                                                                      cornerRadius:_radius];                [self setContext:context path:path];                CGContextDrawPath(context, kCGPathFillStroke);            }else {                CGFloat startRadius = _radius * (kStartTo + (1 - kStartTo) * percent);                CGFloat endRadius = _radius * (kEndTo + (1 - kEndTo) * percent);                CGContextRef context = UIGraphicsGetCurrentContext();                // build curve path                UIBezierPath *path = [self bodyPath:startRadius                                                end:endRadius                                            percent:percent];                [self setContext:context path:path];                CGContextDrawPath(context, kCGPathFillStroke);                if (percent <= 0) {                    _state = SRSlimeStateShortening;#pragma clang diagnostic push#pragma clang diagnostic ignored "-Warc-performSelector-leaks"                    [_target performSelector:_action                                  withObject:self];#pragma clang diagnostic pop                    [self performSelector:@selector(scaling)                               withObject:nil                               afterDelay:kAnimationInterval                                  inModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];                }            }        }            break;        case SRSlimeStateShortening:        {            // back shortneing            _toPoint = CGPointMake((_toPoint.x - _startPoint.x) * 0.8 + _startPoint.x,                                   (_toPoint.y - _startPoint.y) * 0.8 + _startPoint.y);            float p = distansBetween(_startPoint, _toPoint) / _viscous;            float percent = 1 - p;            float r = _radius * p;                        if (p > 0.01) {                CGFloat startRadius = r * (kStartTo + (1 - kStartTo) * percent);                CGContextRef context = UIGraphicsGetCurrentContext();                                CGFloat endRadius = r * (kEndTo + (1 - kEndTo) * percent) * (1 + percent / 2);                UIBezierPath *path = [self bodyPath:startRadius                                                end:endRadius                                            percent:percent];                [self setContext:context path:path];                CGContextDrawPath(context, kCGPathFillStroke);            }else {                self.hidden = YES;                _state = SRSlimeStateMiss;            }        }            break;        default:            break;    }}- (void)setContext:(CGContextRef)context path:(UIBezierPath *)path {    if (self.shadowColor) {        CGContextSetShadowWithColor(context, CGSizeZero, self.shadowBlur, self.shadowColor.CGColor);    }    CGContextSetFillColorWithColor(context, self.bodyColor.CGColor);     CGContextSetLineWidth(context, self.lineWith);    CGContextSetStrokeColorWithColor(context, self.skinColor.CGColor);    CGContextAddPath(context, path.CGPath);}- (void)scaling{    if (_state == SRSlimeStateShortening) {        [self setNeedsDisplay];        [self performSelector:@selector(scaling)                   withObject:nil                   afterDelay:kAnimationInterval                      inModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];    }}- (void)setPullApartTarget:(id)target action:(SEL)action{    _target = target;    _action = action;}- (void)setHidden:(BOOL)hidden{    [super setHidden:hidden];    if (!hidden) {        self.layer.transform = CATransform3DIdentity;        [self setNeedsDisplay];    }}- (void)setState:(SRSlimeState)state{    _state = state;    [NSObject cancelPreviousPerformRequestsWithTarget:self                                             selector:@selector(scaling)                                               object:nil];}@end

/** *  WaterRefreshLoadMoreView.h *  A refresh view looks like UIRefreshControl and have loadMore function *  (水滴下拉刷新，上拉加载) * *  使用方法：（可设置type类型，默认是下拉上拉都有） *      1.  直接initWithType创建,然后将它的scrollView赋值,别忘了在使用它的ScrollView 或者 VC的dealloc *          中调用这个 deallocWithCloseConnect 方法 * *  Created by 覃俊涵 on 13-9-18. All rights reserved. **/#import <UIKit/UIKit.h>#import "SRSlimeView.h"typedef enum{    WaterRefreshTypeRefreshAndLoadMore,//含下拉上拉(default)    WaterRefreshTypeOnlyRefresh,       //仅下拉刷新    WaterRefreshTypeOnlyLoadMore,      //仅加载更多    WaterRefreshTypeNone}WaterViewType;@protocol WaterRefreshDelegate;@protocol WaterLoadMoreDelegate;@interface WaterRefreshLoadMoreView : UIView@property (nonatomic, weak) UIScrollView *scrollView;@property (nonatomic, assign) WaterViewType type;// 水下拉的view@property (nonatomic, weak) UIView *waterRefreshView;// 上拉的view@property (nonatomic, strong) UIView *loadMoreView;// 水滴中央的图片样式@property (nonatomic, strong) UIImageView *refleshView;// 刷新提示字时 前方显示的 图片样式@property (nonatomic, strong) UIImageView *refreshRemindPicView;// refresh上的提示label@property (nonatomic, strong) UILabel *refreshRemind;// loadMore上的提示label@property (nonatomic, strong) UILabel *loadMoreRemind;// loadMore转圈时显示的文字，比如 "加载中.."，没有设置则转动图样居中显示@property (nonatomic, strong) NSString *loadMoreIndicatorWord;@property (nonatomic, weak) id <WaterRefreshDelegate>   refreshDelegate;@property (nonatomic, weak) id <WaterLoadMoreDelegate>  loadMoreDelegate;@property (nonatomic, assign, readonly) BOOL isRefreshing;@property (nonatomic, assign, readonly) BOOL isLoadingMore;// initial method- (id)initWithWithType:(WaterViewType)type;// !你需要在使用它的ScrollView 或者 VC的dealloc中调用这个方法- (void)deallocWithCloseConnect;/*w start: 自动开始水滴下拉刷新自动开始，另一种是靠你手去拖动触发 end  : 结束水滴下拉刷新并显示提示动画，请传入提示语，你可能会想提示："刷新成功", 可指定提示图片 */- (void)startRefreshWithExpansion;- (void)startRefreshWithExpansionWithoutDelegate;- (void)endRefreshWithRemindsWords:(NSString *)remind remindImage:(UIImage *)remindImage;/* start: 自动开始上拉加载,另一种是靠手去上拉 end  : 停止上拉加载，可给予提示 */- (void)startLoadingMoreExpansion;- (void)startLoadingMoreExpansionWithOutDelegate;- (void)endLoadingMoreWithRemind:(NSString *)remind;// 禁掉loadMore的上拉加载功能，ban为YES时提示语默认为“没有更多内容”- (void)banFunctionOfStartLoadMore:(BOOL)ban remind:(NSString *)remind;- (void)setWaterRefreshColor:(UIColor*)color;@end@protocol WaterRefreshDelegate <NSObject>// 水滴下拉刷新的代理方法- (void)slimeRefreshStartRefresh:(WaterRefreshLoadMoreView*)refreshView;- (void)slimeRefreshEndRefresh:(WaterRefreshLoadMoreView *)refreshView;@end@protocol WaterLoadMoreDelegate <NSObject>@optional// 加载更多的代理方法- (void)loadMoreViewStartLoad:(WaterRefreshLoadMoreView*)refreshView;- (void)loadMoreViewEndLoad:(WaterRefreshLoadMoreView *)refreshView;@end

////  WaterRefreshLoadMoreView.m//  shiyanforwaterfresh////  Created by 俊涵 on 13-9-19.//  Copyright (c) 2013年 俊涵. All rights reserved.//#import "WaterRefreshLoadMoreView.h"#import "SRSlimeView.h"#import <QuartzCore/QuartzCore.h>#define KEYPATH_CONTENTOFFSET       @"contentOffset"#define KEYPATH_CONTENTSIZE         @"contentSize"#define STRING_LOADMORE             @"加载更多"#define STRING_NOMORE               @"没有更多内容"#define HEIGHT_DEFAULT              40.0f#define DURIATION_ANIMATE           0.2f#define DURIATION_SHOWNOMORE        1.5f#define TAG_LOADMORE_INDICATOR      200#define kRefreshImageWidth          20.0f#define kDistanceFromRemind         10.0fstatic int scrollViewObservanceContext;static int scrollViewContentSizeContext;typedef enum {    FooterViewStateNormal,    FooterViewStateNormalPullling,    FooterViewStateLoadingMore}FooterViewState;@interface WaterRefreshLoadMoreView(){    UIImageView     *_refleshView;    SRSlimeView     *_slime;}@property (nonatomic, assign) FooterViewState footerState;@property (nonatomic, strong) SRSlimeView *slime;@property (nonatomic, strong) UIActivityIndicatorView *loadMoreActivityView;@property (nonatomic, assign) BOOL closeLoadMore;@property (nonatomic, assign) BOOL endAnimation;@property (nonatomic, assign) BOOL endRefreshWithRemind;@property (nonatomic, assign) BOOL broken;@property (nonatomic, assign) BOOL slimeMissWhenGoingBack;@property (nonatomic, assign) BOOL lastDragScroll;@property (nonatomic, assign) BOOL isHasMoreContent;@property (nonatomic, assign) CGFloat upInset;@property (nonatomic, strong) NSString *refreshRemindWord;@property (nonatomic, strong) NSString *loadMoreRemindWord;@property (nonatomic, strong) UITapGestureRecognizer *gesture;@end@implementation WaterRefreshLoadMoreView {    UIActivityIndicatorView *_activityIndicatorView;    CGFloat     _oldLength;    BOOL        _unmissSlime;    CGFloat     _dragingHeight;}- (id)initWithFrame:(CGRect)frame{    self = [self initWithHeight:HEIGHT_DEFAULT];    return self;}- (id)initWithWithType:(WaterViewType)type{    self = [self initWithHeight:HEIGHT_DEFAULT];    self.type = type;    return self;}- (id)initWithHeight:(CGFloat)height{    CGRect frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, height);    self = [super initWithFrame:frame];    if (self) {        // slime        _slime = [[SRSlimeView alloc] initWithFrame:self.bounds];        _slime.startPoint = CGPointMake(frame.size.width / 2, height / 2);        [self addSubview:_slime];        [_slime setPullApartTarget:self                            action:@selector(pullApart:)];        // 刷新图样        _refleshView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"waterRefreshLoadMore_refresh"]];        _refleshView.center = _slime.startPoint;        _refleshView.bounds = CGRectMake(0.0f, 0.0f, kRefreshImageWidth, kRefreshImageWidth);        [self addSubview:_refleshView];        // indicator        _activityIndicatorView = [[UIActivityIndicatorView alloc]                                  initWithActivityIndicatorStyle:                                  UIActivityIndicatorViewStyleGray];        _activityIndicatorView.center = _slime.startPoint;        [self addSubview:_activityIndicatorView];        // refreshRemind        self.refreshRemind = [[UILabel alloc] initWithFrame:_slime.frame];        [self addSubview:self.refreshRemind];        self.refreshRemind.backgroundColor = [UIColor clearColor];        self.refreshRemind.textAlignment = NSTextAlignmentCenter;        self.refreshRemind.textColor = [UIColor grayColor];        self.refreshRemind.font = [UIFont systemFontOfSize:13.0f];        self.refreshRemind.hidden = YES;        // refreshRemindPicView        self.refreshRemindPicView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, kRefreshImageWidth, kRefreshImageWidth)];        [self addSubview:self.refreshRemindPicView];        self.refreshRemindPicView.hidden = YES;        // 设置拖拽临界点的高度        _dragingHeight = height;        self.slimeMissWhenGoingBack = NO;        self.waterRefreshView = self;    }    return self;}- (void)setWaterRefreshColor:(UIColor*)color{    [_activityIndicatorView setColor:color];    self.refreshRemind.textColor = color; //   _slime.bodyColor = color;}- (void)didMoveToSuperview{    [super didMoveToSuperview];    if ([self.superview isKindOfClass:[UIScrollView class]]) {        _scrollView = (id)[self superview];        if (self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyLoadMore) {            [self addLoadMoreView];        }        self.isHasMoreContent = YES;        // config frame        CGRect rect = self.frame;        rect.origin.y = rect.size.height ? -rect.size.height : -_dragingHeight;        rect.size.width = _scrollView.frame.size.width;        self.frame = rect;        // inset        UIEdgeInsets inset = self.scrollView.contentInset;        inset.top = _upInset;        self.scrollView.contentInset = inset;        [self.scrollView addObserver:self forKeyPath:KEYPATH_CONTENTOFFSET options:0 context:&scrollViewObservanceContext];        [self.scrollView addObserver:self forKeyPath:KEYPATH_CONTENTSIZE options:0 context:&scrollViewContentSizeContext];        // configLoadMoreHide        [self configLoadMoreHide];    }else if (!self.superview) {        self.scrollView = nil;    }}- (void)addLoadMoreView{    // add loadmore    CGFloat maxTop = self.scrollView.frame.size.height > self.scrollView.contentSize.height ? self.scrollView.frame.size.height : self.scrollView.contentSize.height;    self.loadMoreView = [[UIView alloc] initWithFrame:CGRectMake(0, maxTop, [UIScreen mainScreen].bounds.size.width, HEIGHT_DEFAULT)];    [self.scrollView addSubview:self.loadMoreView];    self.loadMoreView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;    self.loadMoreActivityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];    self.loadMoreActivityView.tag = TAG_LOADMORE_INDICATOR;    [self.loadMoreView addSubview:self.loadMoreActivityView];    self.loadMoreActivityView.center = CGPointMake(self.loadMoreView.frame.size.width / 2, self.loadMoreView.frame.size.height / 2);    [self showLoadMoreRemind:STRING_LOADMORE];    // config loadMoreRemind    self.loadMoreRemind = [[UILabel alloc] initWithFrame:self.loadMoreView.bounds];    self.loadMoreRemind.backgroundColor = [UIColor clearColor];    self.loadMoreRemind.font = [UIFont systemFontOfSize:12.0f];    self.loadMoreRemind.textColor = [UIColor grayColor];    self.loadMoreRemind.textAlignment = NSTextAlignmentCenter;    [self.loadMoreView addSubview:self.loadMoreRemind];    //self.loadMoreRemind.hidden = NO;    [self showLoadMoreRemind:STRING_LOADMORE];    // gesture    self.gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(loadMoreActionByClick)];    [self.loadMoreView addGestureRecognizer:self.gesture];    self.footerState = FooterViewStateNormal;    [self configLoadMoreHide];}- (void)loadMoreActionByClick{    [self scrollViewDataSourceDidStartLoadingMore:self.scrollView];}- (void)dealloc{    [self clearObservance];}- (void)deallocWithCloseConnect  // TODO :换成更好的办法{    [self clearObservance];}- (void)clearObservance{    [self.scrollView removeObserver:self forKeyPath:KEYPATH_CONTENTOFFSET context:&scrollViewObservanceContext];    [self.scrollView removeObserver:self forKeyPath:KEYPATH_CONTENTSIZE context:&scrollViewContentSizeContext];    self.scrollView = nil;}- (void)removeFromSuperview{    [NSObject cancelPreviousPerformRequestsWithTarget:self];    [super removeFromSuperview];}#pragma mark - setters And getter- (void)setScrollView:(UIScrollView *)scrollView{    if (_scrollView != scrollView) {        _scrollView = scrollView;        if (self.superview) {            [self.loadMoreView removeFromSuperview];            self.loadMoreView = nil;            [self removeFromSuperview];        }        [self.scrollView addSubview:self];    }}- (void)setType:(WaterViewType)type{    if (self.type == type) {        return;    }    if (self.type != WaterRefreshTypeNone) {        [self.scrollView removeObserver:self forKeyPath:KEYPATH_CONTENTOFFSET context:&scrollViewObservanceContext];        [self.scrollView removeObserver:self forKeyPath:KEYPATH_CONTENTSIZE context:&scrollViewContentSizeContext];    }    _type = type;    _isLoadingMore = NO;    [self setFooterState:FooterViewStateNormal];    self.closeLoadMore = NO;    // 如果切换类型之前动画还未结束    if (self.endAnimation == NO) {        self.endAnimation = YES;    }    self.endRefreshWithRemind = NO;    [self endRefreshWithRemindsWords:@"" remindImage:nil];    [self endLoadingMoreWithRemind:@""];    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(collapse) object:nil];    [self backStateOfScrollView];    if (type == WaterRefreshTypeRefreshAndLoadMore || type == WaterRefreshTypeOnlyRefresh) {        self.hidden = NO;        self.loadMoreView.hidden = NO;        UIScrollView *scrollView = self.scrollView;        self.scrollView = nil; //clear        self.scrollView = scrollView;    } else if (type == WaterRefreshTypeOnlyLoadMore) {        self.loadMoreView.hidden = NO;        self.hidden = YES;        UIScrollView *scrollView = self.scrollView;        self.scrollView = nil; //clear        self.scrollView = scrollView;    } else if(type == WaterRefreshTypeNone) {        self.hidden = YES;        self.loadMoreView.hidden = YES;    }}- (void)backStateOfScrollView{    UIEdgeInsets inset = self.scrollView.contentInset;    inset.top = _upInset;    inset.bottom = 0.0f;    self.scrollView.contentInset = inset;}- (void)setFrame:(CGRect)frame{    [super setFrame:frame];    if (_slime.state == SRSlimeStateNormal) {        _slime.frame = CGRectMake(0.0f, 0.0f, frame.size.width, frame.size.height);        _slime.startPoint = CGPointMake(frame.size.width / 2, _dragingHeight / 2);    }    _refleshView.center = _slime.startPoint;    _activityIndicatorView.center = _slime.startPoint;}- (void)setUpInset:(CGFloat)upInset{    _upInset = upInset;    UIEdgeInsets inset = _scrollView.contentInset;    inset.top = _upInset;    _scrollView.contentInset = inset;}- (void)setSlimeMissWhenGoingBack:(BOOL)slimeMissWhenGoingBack{    _slimeMissWhenGoingBack = slimeMissWhenGoingBack;    if (!slimeMissWhenGoingBack) {        _slime.alpha = 1;    }else {        CGPoint p = _scrollView.contentOffset;        self.alpha = -(p.y + _upInset) / _dragingHeight;    }}#pragma mark - Scroll handle- (void)scrollViewDidScroll{    CGPoint offset = _scrollView.contentOffset;    CGRect rect = self.frame;    // 下拉刷新    if (self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyRefresh) {        if (offset.y <= - _dragingHeight - _upInset) {            // 处于拉伸变形的状态            rect.origin.y = offset.y + _upInset;            rect.size.height = -offset.y;            rect.size.height = ceilf(rect.size.height);            self.frame = rect; //special setFrame            if (!self.isRefreshing) {                [_slime setNeedsDisplay];            }            if (!_broken) {                float l = -(offset.y + _dragingHeight + _upInset);                if (l <= _oldLength) {                    // 往回的时候                    l = MIN(distansBetween(_slime.startPoint, _slime.toPoint), l);                    CGPoint ssp = _slime.startPoint;                    _slime.toPoint = CGPointMake(ssp.x, ssp.y + l);                    CGFloat pf = (1.0f - l / _slime.viscous) * (1.0f - kStartTo) + kStartTo;                    _refleshView.layer.transform = CATransform3DMakeScale(pf, pf, 1);                }else if (self.scrollView.isDragging) {                    // 手拽着往下拉伸的时候                    CGPoint ssp = _slime.startPoint;                    _slime.toPoint = CGPointMake(ssp.x, ssp.y + l);                    CGFloat pf = (1.0f - l / _slime.viscous) * (1.0f - kStartTo) + kStartTo;                    _refleshView.layer.transform = CATransform3DMakeScale(pf, pf, 1);                }                _oldLength = l;            }            if (self.alpha != 1.0f) self.alpha = 1.0f; //拉出来显示的时候可能 alpha不为1        }else if (offset.y < -_upInset) {            rect.origin.y = -_dragingHeight;            rect.size.height = _dragingHeight;            self.frame = rect;            [_slime setNeedsDisplay];            _slime.toPoint = _slime.startPoint;            if (_slimeMissWhenGoingBack)                self.alpha = -(offset.y + _upInset) / _dragingHeight;        }        if (self.isRefreshing && self.broken == NO) {            // 配合适应inset避免 使用 tableview的话 section位置浮动错误            UIEdgeInsets inset = _scrollView.contentInset;            CGFloat offsetmath = MAX(_scrollView.contentOffset.y * -1, 0);            offsetmath = MIN(offsetmath, HEIGHT_DEFAULT);            inset.top = offsetmath;            _scrollView.contentInset = inset;        }    }    if ((self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyLoadMore) && self.closeLoadMore == NO) {        // 上拉        if (self.footerState == FooterViewStateNormal) {            if (self.scrollView.isDragging && [self offsetFromBottom:self.scrollView] > self.loadMoreView.frame.size.height + 5) {                [self setFooterState:FooterViewStateNormalPullling];                if (self.isHasMoreContent == NO) {                } else {                    [self scrollViewDataSourceDidStartLoadingMore:self.scrollView];                }            }        } else if (self.footerState == FooterViewStateNormalPullling) {            if (self.scrollView.isDragging && [self offsetFromBottom:self.scrollView] < self.frame.size.height + 5) {                [self setFooterState:FooterViewStateNormal];            }        } else if (self.footerState == FooterViewStateLoadingMore) {        }    }}- (void)scrollViewDidEndDraging{    // 下拉刷新    if (self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyRefresh) {        if (_broken) {            self.broken = NO;            if (self.isRefreshing) {                [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];                [UIView animateWithDuration:DURIATION_ANIMATE animations:^{                    UIEdgeInsets inset = _scrollView.contentInset;                    inset.top = _upInset + _dragingHeight;                    _scrollView.contentInset = inset;                } completion:^(BOOL finished) {                }];            }        }    }    // 上拉    if ((self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyLoadMore) && self.closeLoadMore == NO) {        if (self.footerState == FooterViewStateNormalPullling) {            if (self.isHasMoreContent == NO) {            } else {                [self scrollViewDataSourceDidStartLoadingMore:self.scrollView];            }        }    }}#pragma mark - loadMore- (void)relayoutLoadMoreViewAndInset{    if (self.closeLoadMore == YES) {        return;    }    CGFloat max = self.scrollView.contentSize.height < self.scrollView.frame.size.height ? self.scrollView.frame.size.height - self.scrollView.contentSize.height : 0;    UIEdgeInsets inset = self.scrollView.contentInset;    inset.bottom = max + self.loadMoreView.frame.size.height;    self.scrollView.contentInset = inset;    CGFloat footerViewTop = MAX(self.scrollView.frame.size.height, self.scrollView.contentSize.height);    self.loadMoreView.frame = CGRectMake(0, footerViewTop, self.loadMoreView.frame.size.width, self.loadMoreView.frame.size.height);}- (void)configLoadMoreHide{    if (self.type == WaterRefreshTypeRefreshAndLoadMore || self.type == WaterRefreshTypeOnlyLoadMore) {        if (self.scrollView.contentSize.height < self.scrollView.frame.size.height) {            self.loadMoreView.hidden = YES;            self.closeLoadMore = YES;            UIEdgeInsets inset = self.scrollView.contentInset;            inset.bottom = 0.0f;            self.scrollView.contentInset = inset;        } else {            self.loadMoreView.hidden = YES;            self.closeLoadMore = YES;            UIEdgeInsets inset = self.scrollView.contentInset;            inset.bottom = self.loadMoreView.frame.size.height;            self.scrollView.contentInset = inset;            self.loadMoreView.hidden = NO;            self.closeLoadMore = NO;        }    }}- (void)startLoadingMoreExpansion{    [self scrollViewDataSourceDidStartLoadingMore:self.scrollView];}- (void)startLoadingMoreExpansionWithOutDelegate{    [self scrollViewDataSourceDidStartLoadingMoreWithOutDelegate:self.scrollView];}- (void)endLoadingMoreWithRemind:(NSString *)remind{    if (self.type == WaterRefreshTypeNone || self.type == WaterRefreshTypeOnlyRefresh) {        return;    }    if (_isLoadingMore) {        self.loadMoreRemindWord = remind;        [self safeStopLoadingMore:self.scrollView];    }}- (void)safeStartLoadingMore:(UIScrollView *)scrollView{    if (!_isLoadingMore) {        _isLoadingMore = YES;    } else {        return;    }    [self endRefreshWithRemindsWords:nil remindImage:nil];    [self setFooterState:FooterViewStateLoadingMore];    self.gesture.enabled = NO;    self.loadMoreView.hidden = NO;    [self showLoadMoreRemind:@""]; //清空    [self.loadMoreActivityView startAnimating];    // config 转动时提示    [self configIndicatorPositionWithWord:self.loadMoreIndicatorWord];    self.loadMoreRemind.alpha = 0.45f;    // cofig animate with indicatorword    NSTimeInterval animateDuration = 0.7f;    [UIView animateWithDuration:animateDuration animations:^{        self.loadMoreRemind.alpha = 1.0f;    }];    CAKeyframeAnimation *aniamtion = [CAKeyframeAnimation animationWithKeyPath:@"transform"];    aniamtion.values = [NSArray arrayWithObjects:                        [NSValue valueWithCATransform3D:                         CATransform3DRotate(CATransform3DMakeScale(0.01, 0.01, 0.1),                                             -M_PI, 0, 0, 1)],                        [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.6, 1.6, 1)],                        [NSValue valueWithCATransform3D:CATransform3DIdentity], nil];    aniamtion.keyTimes = [NSArray arrayWithObjects:                          [NSNumber numberWithFloat:0],                          [NSNumber numberWithFloat:0.6],                          [NSNumber numberWithFloat:1], nil];    aniamtion.timingFunctions = [NSArray arrayWithObjects:                                 [CAMediaTimingFunction functionWithName:                                  kCAMediaTimingFunctionEaseInEaseOut],                                 [CAMediaTimingFunction functionWithName:                                  kCAMediaTimingFunctionEaseInEaseOut],                                 nil];    aniamtion.duration = animateDuration;    self.loadMoreActivityView.layer.transform = CATransform3DIdentity;    [self.loadMoreActivityView.layer addAnimation:aniamtion forKey:@""];    }- (void)safeStopLoadingMore:(UIScrollView *)scrollView{    if (!_isLoadingMore) {        return;    }    [UIView setAnimationCurve:UIViewAnimationCurveEaseIn];    [UIView animateWithDuration:0.2f animations:^{        self.loadMoreActivityView.layer.transform = CATransform3DRotate(CATransform3DMakeScale(0.01f, 0.01f, 0.1f), -M_PI, 0, 0, 1);        self.loadMoreRemind.alpha = 0.2f;    } completion:^(BOOL finished) {        [self.loadMoreActivityView stopAnimating];        self.loadMoreActivityView.layer.transform = CATransform3DRotate(CATransform3DMakeScale(1.0f, 1.0f, 1.0f), M_PI, 0, 0, 1);        self.loadMoreRemind.alpha = 1.0f;        [self relayoutLoadMoreViewAndInset];        if (self.isHasMoreContent) {            if (self.loadMoreRemindWord) {                //错误提示语                [self showLoadMoreRemind:self.loadMoreRemindWord];                [self performSelector:@selector(backToLoadMoreRemind) withObject:nil afterDelay:1.0f];            } else {                [self showLoadMoreRemind:STRING_LOADMORE];                _isLoadingMore = NO;                [self setFooterState:FooterViewStateNormal];                self.gesture.enabled = YES;                if ([self.loadMoreDelegate respondsToSelector:@selector(loadMoreViewEndLoad:)]) {                    [self.loadMoreDelegate loadMoreViewEndLoad:self];                }            }        } else {            if (self.loadMoreRemindWord) {                if ([self.loadMoreRemindWord isEqualToString:@""]) {                    self.loadMoreRemindWord = STRING_NOMORE;                }                [self showLoadMoreRemind:self.loadMoreRemindWord];            } else {                [self showNoContentRemind];            }            [self performSelector:@selector(setInsetBottomAnimateToZeroAndCallDelegate:) withObject:[NSNumber numberWithBool:YES] afterDelay:DURIATION_SHOWNOMORE];        }    }];}- (void)setInsetBottomAnimateToZeroAndCallDelegate:(NSNumber *)callDelegate{    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];    [UIView animateWithDuration:DURIATION_ANIMATE animations:^{        [self setInsetBottomToZero];    } completion:^(BOOL finished) {        _isLoadingMore = NO;        [self setFooterState:FooterViewStateNormal];        if (self.isHasMoreContent) {            self.gesture.enabled = YES;        }        if (callDelegate.boolValue) {            if ([self.loadMoreDelegate respondsToSelector:@selector(loadMoreViewEndLoad:)]) {                [self.loadMoreDelegate loadMoreViewEndLoad:self];            }        };    }];    [UIView commitAnimations];}- (void)setInsetBottomToZero{    UIEdgeInsets currentInsets = self.scrollView.contentInset;    currentInsets.bottom = 0;    self.scrollView.contentInset = currentInsets;}- (void)scrollViewDataSourceDidStartLoadingMore:(UIScrollView *)scrollView{    if (!_isLoadingMore) {        [self safeStartLoadingMore:scrollView];        if ([self.loadMoreDelegate respondsToSelector:@selector(loadMoreViewStartLoad:)]) {            [self.loadMoreDelegate loadMoreViewStartLoad:self];        }    }}- (void)scrollViewDataSourceDidStartLoadingMoreWithOutDelegate:(UIScrollView *)scrollView{    [self safeStartLoadingMore:scrollView];}- (void)scrollViewDataSourceDidFinishLoadingMore:(UIScrollView *)scrollView{    [self safeStopLoadingMore:scrollView];}- (CGFloat)offsetFromBottom:(UIScrollView *)scrollView{    CGFloat change = scrollView.contentSize.height < scrollView.frame.size.height ? 0 :  scrollView.contentSize.height - scrollView.frame.size.height;    return  scrollView.contentOffset.y - change;}- (void)showNoContentRemind{    self.loadMoreRemind.hidden = NO;    [self showLoadMoreRemind:STRING_NOMORE];}- (void)showLoadMoreRemind:(NSString *)remindword{    self.loadMoreActivityView.hidden = YES;    self.loadMoreRemind.hidden = NO;    self.loadMoreRemind.text = remindword;    self.loadMoreRemind.center = CGPointMake(self.loadMoreView.frame.size.width / 2, self.loadMoreView.frame.size.height / 2);    self.loadMoreRemindWord = nil; //clear}- (void)backToLoadMoreRemind{    UILabel *label = self.loadMoreRemind;    [UIView animateWithDuration:0.3f animations:^{        label.alpha = 0.0f;    } completion:^(BOOL finished) {        [self showLoadMoreRemind:STRING_LOADMORE];        [UIView animateWithDuration:0.3f animations:^{            label.alpha = 1.0f;            self.gesture.enabled = YES;            _isLoadingMore = NO;            [self setFooterState:FooterViewStateNormal];            if ([self.loadMoreDelegate respondsToSelector:@selector(loadMoreViewEndLoad:)]) {                [self.loadMoreDelegate loadMoreViewEndLoad:self];            }        }];    }];}- (void)banFunctionOfStartLoadMore:(BOOL)ban remind:(NSString *)remind{    if (ban) {        self.gesture.enabled = NO;        self.isHasMoreContent = NO;        if (remind) {            self.loadMoreRemind.text = remind;            [self endLoadingMoreWithRemind:remind];        } else {            self.loadMoreRemind.text = STRING_NOMORE;            [self endLoadingMoreWithRemind:STRING_NOMORE];        }        [self performSelector:@selector(setInsetBottomAnimateToZeroAndCallDelegate:) withObject:[NSNumber numberWithBool:NO] afterDelay:DURIATION_SHOWNOMORE];    } else {        self.gesture.enabled = YES;        self.isHasMoreContent = YES;        if (!_isLoadingMore) {            [self showLoadMoreRemind:STRING_LOADMORE];        }    }}- (void)configIndicatorPositionWithWord:(NSString *)word{    if (word && ![word isEqualToString:@""]) {        // 如果有提供的文字就做左偏移        self.loadMoreRemind.hidden = NO;        self.loadMoreRemind.alpha = 1.0f;        self.loadMoreRemind.text = word;        CGSize size = [word sizeWithFont:self.loadMoreRemind.font constrainedToSize:CGSizeMake(self.loadMoreView.bounds.size.width, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];        CGRect rect = self.loadMoreRemind.frame;        rect.size.width = size.width;        rect.size.height = size.height;        self.loadMoreRemind.frame = rect;        self.loadMoreRemind.center = CGPointMake(self.loadMoreView.frame.size.width / 2, self.loadMoreView.frame.size.height / 2);        self.loadMoreActivityView.center = CGPointMake(self.loadMoreRemind.frame.origin.x - kDistanceFromRemind, self.loadMoreActivityView.center.y);        [self alignmentWithView:self.loadMoreActivityView lable:self.loadMoreRemind distance:kDistanceFromRemind totalWidth:self.scrollView.frame.size.width];    } else {        //还原        self.loadMoreRemind.hidden = YES;        UIActivityIndicatorView *indicator = (UIActivityIndicatorView *)[self.loadMoreView viewWithTag:TAG_LOADMORE_INDICATOR];        indicator.center = CGPointMake(self.loadMoreView.frame.size.width / 2, self.loadMoreView.frame.size.height / 2);        self.loadMoreRemind.center = indicator.center;    }}- (void)alignmentWithView:(UIView *)view lable:(UILabel *)label distance:(CGFloat)distance totalWidth:(CGFloat)totalWidth{    CGFloat viewWidths = view.frame.size.width + distance + label.frame.size.width;    CGFloat left = (totalWidth - viewWidths) / 2;    view.center = CGPointMake(left + view.frame.size.width / 2 , view.center.y);    label.center = CGPointMake(view.center.x + view.frame.size.width /2 + distance + label.frame.size.width / 2, label.center.y);}#pragma mark - refresh- (void)setIsRefreshing:(BOOL)isRefreshing{    if (_isRefreshing == isRefreshing) {        return;    }    _isRefreshing = isRefreshing;    if (_isRefreshing) {        [self endLoadingMoreWithRemind:nil];        [_activityIndicatorView.layer removeAllAnimations];        [_activityIndicatorView startAnimating];        CAKeyframeAnimation *aniamtion = [CAKeyframeAnimation animationWithKeyPath:@"transform"];        aniamtion.values = [NSArray arrayWithObjects:                            [NSValue valueWithCATransform3D:                             CATransform3DRotate(CATransform3DMakeScale(0.01, 0.01, 0.1),                                                 -M_PI, 0, 0, 1)],                            [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.6, 1.6, 1)],                            [NSValue valueWithCATransform3D:CATransform3DIdentity], nil];        aniamtion.keyTimes = [NSArray arrayWithObjects:                              [NSNumber numberWithFloat:0],                              [NSNumber numberWithFloat:0.6],                              [NSNumber numberWithFloat:1], nil];        aniamtion.timingFunctions = [NSArray arrayWithObjects:                                     [CAMediaTimingFunction functionWithName:                                      kCAMediaTimingFunctionEaseInEaseOut],                                     [CAMediaTimingFunction functionWithName:                                      kCAMediaTimingFunctionEaseInEaseOut],                                     nil];        aniamtion.duration = 0.7;        aniamtion.delegate = self;        _activityIndicatorView.layer.transform = CATransform3DIdentity;        [_activityIndicatorView.layer addAnimation:aniamtion                                            forKey:@""];        _refleshView.hidden = YES;        if (!_unmissSlime){            _slime.state = SRSlimeStateMiss;        }else {            _unmissSlime = NO;        }    }else {        // 刷新结束        [_activityIndicatorView stopAnimating];        [_activityIndicatorView.layer removeAllAnimations];        _refleshView.layer.transform = CATransform3DIdentity;        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];        [UIView animateWithDuration:0.35f animations:^{            UIEdgeInsets inset = _scrollView.contentInset;            inset.top = _upInset;            _scrollView.contentInset = inset;            if (_scrollView.contentOffset.y == -_upInset &&                _slimeMissWhenGoingBack) {                self.alpha = 0.0f;            }        } completion:^(BOOL finished) {            _broken = NO;            _slime.hidden = NO;            _refleshView.hidden = NO;            self.refreshRemind.text = @"";            self.refreshRemindPicView.hidden = YES;        }];    }}- (void)startRefreshWithExpansion{    if (self.type == WaterRefreshTypeOnlyLoadMore || self.type == WaterRefreshTypeNone) {        return;    }    if (self.isRefreshing) {        return;    }    [UIView animateWithDuration:DURIATION_ANIMATE animations:^() {        UIEdgeInsets inset = _scrollView.contentInset;        inset.top = _upInset + _dragingHeight;        _scrollView.contentInset = inset;        [_scrollView setContentOffset:CGPointMake(_scrollView.contentOffset.x,                                                  -_scrollView.contentInset.top)                             animated:NO];    }];    [self startRefresh];}-(void)startRefreshWithExpansionWithoutDelegate{    if (self.type == WaterRefreshTypeOnlyLoadMore || self.type == WaterRefreshTypeNone) {        return;    }    if (self.isRefreshing) {        return;    }    [UIView animateWithDuration:DURIATION_ANIMATE animations:^() {        UIEdgeInsets inset = _scrollView.contentInset;        inset.top = _upInset + _dragingHeight;        _scrollView.contentInset = inset;        [_scrollView setContentOffset:CGPointMake(_scrollView.contentOffset.x,                                                  -_scrollView.contentInset.top)                             animated:NO];    } completion:^(BOOL finished) {    }];    self.isRefreshing = YES;}- (void)startRefresh{    self.isRefreshing = YES;    if ([self.refreshDelegate respondsToSelector:@selector(slimeRefreshStartRefresh:)]) {        [self.refreshDelegate slimeRefreshStartRefresh:self];    }}- (void)pullApart:(WaterRefreshLoadMoreView*)refreshView{    self.broken = YES;    _unmissSlime = YES;    [self startRefresh];}- (void)endRefreshWithRemindsWords:(NSString *)remind remindImage:(UIImage *)remindImage{    if (self.type == WaterRefreshTypeOnlyLoadMore || self.type == WaterRefreshTypeNone ) {        return;    }    if (self.isRefreshing && self.endRefreshWithRemind == NO) {        self.refreshRemindWord = remind;        self.refreshRemindPicView.image = remindImage;        self.endRefreshWithRemind = YES;        if (self.endAnimation == YES) {            [self restore];        }    }}- (void)showRemindWordAndClear;{    if (!self.refreshRemindWord || [self.refreshRemindWord isEqualToString:@""]) {        [self collapse];        return;    }    self.refreshRemind.hidden = NO;    self.refreshRemind.text = self.refreshRemindWord;    self.refreshRemindWord = nil;    [self performSelector:@selector(collapse) withObject:nil afterDelay:0.5f];    }- (void)configRefreshPicViewPositionWithWord:(NSString *)word{    if (word && ![word isEqualToString:@""]) {        // 如果有提供的文字就做左偏移        //self.refreshRemindPicView.hidden = NO;        self.refreshRemindPicView.alpha = 1.0f;        CGSize size = [word sizeWithFont:self.refreshRemind.font constrainedToSize:CGSizeMake(self.bounds.size.width, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];        CGRect rect = self.refreshRemind.frame;        rect.size.width = size.width;        rect.size.height = size.height;        self.refreshRemind.frame = rect;        self.refreshRemind.center = _slime.startPoint;        self.refreshRemindPicView.center = CGPointMake(self.refreshRemind.frame.origin.x - kDistanceFromRemind, self.refreshRemind.center.y);        [self alignmentWithView:self.refreshRemindPicView lable:self.refreshRemind distance:kDistanceFromRemind totalWidth:self.scrollView.frame.size.width];    } else {        //还原        //self.refreshRemindPicView.hidden = NO;        self.refreshRemindPicView.alpha = 1.0f;        self.refreshRemindPicView.center = _slime.startPoint;    }}- (void)restore{    _oldLength = 0.0f;    _slime.toPoint = _slime.startPoint;    [_activityIndicatorView.layer removeAllAnimations];    [UIView setAnimationCurve:UIViewAnimationCurveEaseIn];    [UIView animateWithDuration:0.3f animations:^{        _activityIndicatorView.layer.transform = CATransform3DRotate(CATransform3DMakeScale(0.01f, 0.01f, 0.1f), -M_PI, 0, 0, 1);    } completion:^(BOOL finished)     {         [self relayoutLoadMoreViewAndInset];         if (self.refreshRemindPicView.image) {             self.refreshRemindPicView.hidden = NO;             [self configRefreshPicViewPositionWithWord:self.refreshRemindWord];         } else {             [self alignmentWithView:nil lable:self.refreshRemind distance:0.0f totalWidth:self.scrollView.frame.size.width];         }         if (self.refreshRemindWord) {             self.refreshRemind.hidden = NO;             [self showRemindWordAndClear];         } else {             [self collapse];         }     }];}- (void)collapse{    if (_isRefreshing == NO) {        return;    }    [self setIsRefreshing:NO];    self.endRefreshWithRemind = NO;    _slime.state = SRSlimeStateNormal;    if ([self.refreshDelegate respondsToSelector:@selector(slimeRefreshEndRefresh:)]) {        [self.refreshDelegate slimeRefreshEndRefresh:self];    }}#pragma mark - Observer handle- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{    if (context == &scrollViewObservanceContext) {        // handle change        if ([keyPath isEqualToString:KEYPATH_CONTENTOFFSET]) {            [self scrollViewDidScroll];            if (self.scrollView.dragging == YES && self.lastDragScroll == NO) {                self.lastDragScroll = YES;            } else if (self.scrollView.dragging == NO && self.lastDragScroll == YES) {                self.lastDragScroll = NO;                [self scrollViewDidEndDraging];            }        }    }    if (context == &scrollViewContentSizeContext) {        if ([keyPath isEqualToString:KEYPATH_CONTENTSIZE]) {            [self configLoadMoreHide];            [self relayoutLoadMoreViewAndInset];        }    }}#pragma mark - Animation Delegate- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{    self.endAnimation = YES;    if (self.endRefreshWithRemind == YES) {        self.endRefreshWithRemind = NO;        self.endAnimation = NO;        [self restore];    }}- (void)animationDidStart:(CAAnimation *)anim{    self.endAnimation = NO;}@end