////  LiveScaleLabel.h//  ShowLabel////  Created by XianMingYou on 15/1/26.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import <UIKit/UIKit.h>@interface LiveScaleLabel : UIView@property (nonatomic) CGFloat beginScaleValue;@property (nonatomic) CGFloat endScaleValue;@property (nonatomic, strong) UIColor  *normalStateColor;@property (nonatomic, strong) UIColor  *maxStateColor;@property (nonatomic, strong) NSString *text;@property (nonatomic, strong) UIFont   *font;@property (nonatomic) CGFloat sensitiveValue; // 敏感的值@property (nonatomic) CGFloat currentValue;   // 当前值- (void)buildView;- (void)accessCurrentValue:(CGFloat)currentValue;@end

////  LiveScaleLabel.m//  ShowLabel////  Created by XianMingYou on 15/1/26.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import "LiveScaleLabel.h"@interface LiveScaleLabel ()@property (nonatomic, strong) UILabel *label;@property (nonatomic, strong) UIView  *snapView;@property (nonatomic, strong) UILabel *maxLabel;@end@implementation LiveScaleLabel- (instancetype)initWithFrame:(CGRect)frame {    if (self = [super initWithFrame:frame]) {        [self setUpLabelWithFrame:self.bounds];    }        return self;}- (void)setUpLabelWithFrame:(CGRect)frame {    self.label                  = [[UILabel alloc] initWithFrame:frame];    self.label.textAlignment    = NSTextAlignmentCenter;        self.maxLabel               = [[UILabel alloc] initWithFrame:frame];    self.maxLabel.textAlignment = NSTextAlignmentCenter;}- (void)buildView {    UIColor *normalStateColor = (self.normalStateColor == nil ? [UIColor blackColor] : self.normalStateColor);    UIColor *maxStateColor    = (self.maxStateColor == nil ? [UIColor redColor] : self.maxStateColor);    UIFont  *font             = (self.font == nil ? [UIFont systemFontOfSize:16.f] : self.font);    NSString *text            = (self.text == nil ? @"" : self.text);        // 设置基本样式    self.label.text      = text;    self.label.textColor = normalStateColor;    self.label.font      = font;        self.maxLabel.text      = text;    self.maxLabel.textColor = maxStateColor;    self.maxLabel.font      = font;        // 截图    [self addSubview:self.label];    [self addSubview:self.maxLabel];        // 设定起始状态值    [self accessCurrentValue:self.currentValue];}- (void)accessCurrentValue:(CGFloat)currentValue {    CGFloat beginScaleValue = (self.beginScaleValue <= 0 ? 1.f : self.beginScaleValue);    CGFloat endScaleValue   = (self.endScaleValue   <= 0 ? 1.f : self.endScaleValue);    CGFloat sensitiveValue  = (self.sensitiveValue  <= 0 ? 320 : self.sensitiveValue);        CGFloat percent = currentValue / sensitiveValue;    if (percent >= 1) {        percent = 1;    } else if (percent <= 0) {        percent = 0;    }        self.transform      = CGAffineTransformMake(beginScaleValue + percent * endScaleValue, 0, 0,                                                beginScaleValue + percent * endScaleValue, 0, 0);    self.maxLabel.alpha = percent;    self.label.alpha    = 1 - percent;}@end

////  ViewController.m//  ShowLabel////  Created by XianMingYou on 15/1/26.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import "ViewController.h"#import "LiveScaleLabel.h"@interface ViewController ()<UIScrollViewDelegate>@property (nonatomic, strong) UIScrollView   *scrollView;@property (nonatomic, strong) LiveScaleLabel *liveLabelLeft;@property (nonatomic, strong) LiveScaleLabel *liveLabelRight;@property (nonatomic, strong) UIView         *lineView;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    self.view.backgroundColor = [UIColor blackColor];        // 左侧view    self.liveLabelLeft                  = [[LiveScaleLabel alloc] initWithFrame:CGRectMake(0, 300, 160, 30)];    self.liveLabelLeft.normalStateColor = [UIColor grayColor];    self.liveLabelLeft.text             = @"YouXianMing";    self.liveLabelLeft.endScaleValue    = 0.2;    self.liveLabelLeft.sensitiveValue   = 320;    [self.liveLabelLeft buildView];    [self.liveLabelLeft accessCurrentValue:320];    [self.view addSubview:self.liveLabelLeft];        // 右侧view    self.liveLabelRight                  = [[LiveScaleLabel alloc] initWithFrame:CGRectMake(160, 300, 160, 30)];    self.liveLabelRight.text             = @"NoZuoNoDie";    self.liveLabelRight.normalStateColor = [UIColor grayColor];    self.liveLabelRight.maxStateColor    = [UIColor cyanColor];    self.liveLabelRight.endScaleValue    = 0.2;    self.liveLabelRight.sensitiveValue   = 320;    [self.liveLabelRight buildView];    [self.view addSubview:self.liveLabelRight];        self.scrollView                                = [[UIScrollView alloc] initWithFrame:self.view.bounds];    self.scrollView.delegate                       = self;    self.scrollView.pagingEnabled                  = YES;    self.scrollView.showsHorizontalScrollIndicator = NO;    self.scrollView.contentSize                    = CGSizeMake(self.scrollView.frame.size.width * 2,                                                                self.scrollView.frame.size.height);    [self.view addSubview:self.scrollView];        // 线条view    self.lineView            = [[UIView alloc] initWithFrame:CGRectMake(0, 300 + 30, 160, 1)];    UIView *backView         = [[UIView alloc] initWithFrame:CGRectMake(20, 0, 120, 1)];    backView.backgroundColor = [UIColor yellowColor];    [self.lineView addSubview:backView];    [self.view addSubview:self.lineView];}- (void)scrollViewDidScroll:(UIScrollView *)scrollView {    CGFloat x = scrollView.contentOffset.x;    [self.liveLabelLeft  accessCurrentValue:320 - x];    [self.liveLabelRight accessCurrentValue:x];        CGRect rect = self.lineView.frame;    rect.origin.x      = x / 2.f;    self.lineView.frame = rect;}@end