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[iOS UI进阶 - 5.0] 手势解锁Demo
A.需求
1.九宫格手势解锁
2.使用了绘图和手势事件
code source: https://github.com/hellovoidworld/GestureUnlockDemo
B.实现
- 使用按钮来处理每个圆点
- 使用代码生成按钮
- 取消按钮点击事件
- 设置普通状态和选中状态的背景图片
- CGRectContainsPoint,移动到按钮范围内改变按钮为选中状态
- 按钮的连接:使用数组存储被选中的所有按钮,画上连线
- 已经连线的按钮不需要再连线
- 触摸结束清空连线和按钮选中状态
- 移动中也要画出线,最后的点用来辅助画移动中的线
- 解决bug:每次触摸开始重置当前画笔位置
- 设置触摸触发选中的按钮内部范围
- 使用tag记录按钮的选中顺序轨迹,触摸结束取得轨迹
- 封装整个手势解锁view成为一个自定义控件
- 封装按钮称为自定类
1.准备基础界面,使用一个UIView作为解锁画面
2.在控制器ViewController设置一下背景图片和状态栏
1 // 2 // ViewController.m 3 // HVWLockView 4 // 5 // Created by hellovoidworld on 15/1/12. 6 // Copyright (c) 2015年 hellovoidworld. All rights reserved. 7 // 8 9 #import "ViewController.h"10 11 @interface ViewController ()12 13 @end14 15 @implementation ViewController16 17 - (void)viewDidLoad {18 [super viewDidLoad];19 // Do any additional setup after loading the view, typically from a nib.20 21 // 设置背景22 self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Home_refresh_bg"]];23 }24 25 /** 设置状态栏样式 */26 - (UIStatusBarStyle)preferredStatusBarStyle {27 return UIStatusBarStyleLightContent;28 }29 30 - (void)didReceiveMemoryWarning {31 [super didReceiveMemoryWarning];32 // Dispose of any resources that can be recreated.33 }34 35 36 @end
3.自定义解锁画面的类HVWLockView
4.使用代码初始化HVWLockView的子控件—按钮,设置按钮的样式、位置尺寸
1 // 2 // HVWLockView.m 3 // HVWLockView 4 // 5 // Created by hellovoidworld on 15/1/12. 6 // Copyright (c) 2015年 hellovoidworld. All rights reserved. 7 // 8 9 #import "HVWLockView.h"10 #import "HVWLockButton.h"11 12 #define BUTTON_COUNT 913 #define BUTTON_COL_COUNT 314 15 @implementation HVWLockView16 17 #pragma mark - 初始化方法18 /** 使用文件初始化 */19 - (id)initWithCoder:(NSCoder *)aDecoder {20 if (self = [super initWithCoder:aDecoder]) {21 [self initView];22 }23 return self;24 }25 26 /** 使用代码初始化 */27 - (instancetype)initWithFrame:(CGRect)frame {28 if (self = [super initWithFrame:frame]) {29 [self initView];30 }31 return self;32 }33 34 /** 初始化view内的控件(按钮) */35 - (void) initView {36 for (int i=0; i<BUTTON_COUNT; i++) {37 HVWLockButton *button = [HVWLockButton buttonWithType:UIButtonTypeCustom];38 39 // 取消点击时间40 button.userInteractionEnabled = NO;41 42 // 设置指标tag,用来记录轨迹43 button.tag = i;44 45 // 设置普通状态图片46 [button setBackgroundImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal];47 48 // 设置选中状态图片49 [button setBackgroundImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateSelected];50 51 // 加入按钮到lock view52 [self addSubview:button];53 }54 }55 56 /** 设置按钮位置尺寸 */57 - (void)layoutSubviews {58 [super layoutSubviews];59 60 // 取出所有按钮61 for (int i=0; i<self.subviews.count; i++) {62 HVWLockButton *button = self.subviews[i];63 CGFloat buttonWidth = 74;64 CGFloat buttonHeight = 74;65 66 // 此按钮所在列号67 int col = i % BUTTON_COL_COUNT;68 // 此按钮所在行号69 int row = i / BUTTON_COL_COUNT;70 // 等分水平多余空间,计算出间隙71 CGFloat marginX = (self.frame.size.width - BUTTON_COL_COUNT * buttonWidth) / (BUTTON_COL_COUNT + 1);72 CGFloat marginY = marginX;73 74 // x坐标75 CGFloat buttonX = marginX + col * (buttonWidth + marginX);76 // y坐标77 CGFloat buttonY = marginY + row * (buttonHeight + marginY);78 79 button.frame = CGRectMake(buttonX, buttonY, buttonWidth, buttonHeight);80 }81 }82 83 @end
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5.实现触摸事件方法
(1)点击开始,使被点击的按钮改变为选中状态(改变图片)
(2)点击拖曳中,同样使被触碰到的按钮改变为选中状态
(3)点击结束,清空选中状态
(4)小修改:把HVWLockView背景改为透明
HVWLockView:
1 #pragma mark - 触摸事件 2 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 3 UITouch *touch = [touches anyObject]; 4 CGPoint touchLocation = [touch locationInView:touch.view]; 5 6 // 检测哪个按钮被点中了 7 for (HVWLockButton *button in self.subviews) { 8 if (CGRectContainsPoint(button.frame, touchLocation)) { 9 button.selected = YES;10 }11 }12 13 }14 15 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {16 UITouch *touch = [touches anyObject];17 CGPoint touchLocation = [touch locationInView:touch.view];18 19 // 检测哪个按钮被点中了20 for (HVWLockButton *button in self.subviews) {21 if (CGRectContainsPoint(button.frame, touchLocation)) {22 button.selected = YES;23 }24 }25 }26 27 - (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {28 // 消除所有按钮选中状态29 for (HVWLockButton *button in self.subviews) {30 button.selected = NO;31 }32 }
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6.画出连接线
(1)优化:将按钮封装为一个类HVWLockButton
1 // 2 // HVWLockButton.m 3 // HVWLockView 4 // 5 // Created by hellovoidworld on 15/1/12. 6 // Copyright (c) 2015年 hellovoidworld. All rights reserved. 7 // 8 9 #import "HVWLockButton.h"10 11 @implementation HVWLockButton12 13 /** 使用文件创建会调用 */14 - (id)initWithCoder:(NSCoder *)aDecoder {15 if (self = [super initWithCoder:aDecoder]) {16 [self initLockButton];17 }18 return self;19 }20 21 /** 使用代码创建会调用 */22 - (instancetype)initWithFrame:(CGRect)frame {23 if (self = [super initWithFrame:frame]) {24 [self initLockButton];25 }26 return self;27 }28 29 /** 初始化 */30 - (void) initLockButton {31 // 取消交互事件(点击)32 self.userInteractionEnabled = NO;33 34 // 设置普通状态图片35 [self setBackgroundImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal];36 37 // 设置选中状态图片38 [self setBackgroundImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateSelected];39 }40 41 @end
(2)使用一个数组来存储已经被选择的按钮
(3)把触碰到的按钮到加入到上述数组中
(4)在绘图方法中把数组内的按钮用线连起来
(5)使用一个成员变量来存储当前触摸位置,画出最后触摸的按钮到现触摸点的线
(6)重复触碰同一个按钮的时候,不用重绘和计算
(7)创建一个代理方法,在触摸结束的时候输出轨迹序列
(8)精简一下代码
1 // 2 // HVWLockView.m 3 // HVWLockView 4 // 5 // Created by hellovoidworld on 15/1/12. 6 // Copyright (c) 2015年 hellovoidworld. All rights reserved. 7 // 8 9 #import "HVWLockView.h" 10 #import "HVWLockButton.h" 11 12 #define BUTTON_COUNT 9 13 #define BUTTON_COL_COUNT 3 14 15 @interface HVWLockView() 16 17 /** 已选择按钮数组 */ 18 @property(nonatomic, strong) NSMutableArray *selectedButtons; 19 20 /** 触摸位置 */ 21 @property(nonatomic, assign) CGPoint currentTouchLocation; 22 23 @end 24 25 @implementation HVWLockView 26 27 /** 初始化数组 */ 28 - (NSMutableArray *)selectedButtons { 29 if (nil == _selectedButtons) { 30 _selectedButtons = [NSMutableArray array]; 31 } 32 return _selectedButtons; 33 } 34 35 #pragma mark - 初始化方法 36 /** 使用文件初始化 */ 37 - (id)initWithCoder:(NSCoder *)aDecoder { 38 if (self = [super initWithCoder:aDecoder]) { 39 [self initView]; 40 } 41 return self; 42 } 43 44 /** 使用代码初始化 */ 45 - (instancetype)initWithFrame:(CGRect)frame { 46 if (self = [super initWithFrame:frame]) { 47 [self initView]; 48 } 49 return self; 50 } 51 52 /** 初始化view内的控件(按钮) */ 53 - (void) initView { 54 // 设置透明背景 55 self.backgroundColor = [[UIColor alloc] initWithRed:1 green:1 blue:1 alpha:0]; 56 57 for (int i=0; i<BUTTON_COUNT; i++) { 58 HVWLockButton *button = [HVWLockButton buttonWithType:UIButtonTypeCustom]; 59 60 // 设置指标tag,用来记录轨迹 61 button.tag = i; 62 63 // 加入按钮到lock view 64 [self addSubview:button]; 65 } 66 } 67 68 /** 设置按钮位置尺寸 */ 69 - (void)layoutSubviews { 70 [super layoutSubviews]; 71 72 // 取出所有按钮 73 for (int i=0; i<self.subviews.count; i++) { 74 HVWLockButton *button = self.subviews[i]; 75 CGFloat buttonWidth = 74; 76 CGFloat buttonHeight = 74; 77 78 // 此按钮所在列号 79 int col = i % BUTTON_COL_COUNT; 80 // 此按钮所在行号 81 int row = i / BUTTON_COL_COUNT; 82 // 等分水平多余空间,计算出间隙 83 CGFloat marginX = (self.frame.size.width - BUTTON_COL_COUNT * buttonWidth) / (BUTTON_COL_COUNT + 1); 84 CGFloat marginY = marginX; 85 86 // x坐标 87 CGFloat buttonX = marginX + col * (buttonWidth + marginX); 88 // y坐标 89 CGFloat buttonY = marginY + row * (buttonHeight + marginY); 90 91 button.frame = CGRectMake(buttonX, buttonY, buttonWidth, buttonHeight); 92 } 93 } 94 95 #pragma mark - 触摸事件 96 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 97 98 [self touchesMoved:touches withEvent:event]; 99 100 }101 102 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {103 UITouch *touch = [touches anyObject];104 CGPoint touchLocation = [touch locationInView:touch.view];105 106 // 检测哪个按钮被点中了107 for (HVWLockButton *button in self.subviews) {108 109 // 如果触碰到了此按钮110 if (CGRectContainsPoint(button.touchFrame, touchLocation)) {111 button.selected = YES;112 113 // 如果此按钮没有被触碰过才进行处理114 if (![self.selectedButtons containsObject:button]) {115 // 加入到数组116 [self.selectedButtons addObject:button];117 }118 }119 120 // 当前触摸位置121 self.currentTouchLocation = touchLocation;122 }123 124 // 重绘125 [self setNeedsDisplay];126 }127 128 - (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {129 // 轨迹序列130 NSMutableString *passPath = [NSMutableString string];131 132 // 合成轨迹序列133 for (HVWLockButton *button in self.selectedButtons) {134 // 添加到轨迹序列135 [passPath appendFormat:@"%d", button.tag];136 }137 138 // 调用代理方法139 if ([self.delegate respondsToSelector:@selector(hvwLockView:didFinishedWithPath:)]) {140 [self.delegate hvwLockView:self didFinishedWithPath:passPath];141 }142 143 // 清除选中状态144 [self.selectedButtons makeObjectsPerformSelector:@selector(setSelected:) withObject:@(NO)];145 146 // 清空数组147 [self.selectedButtons removeAllObjects];148 149 // 重绘150 [self setNeedsDisplay];151 }152 153 154 #pragma mark - 绘图方法155 - (void)drawRect:(CGRect)rect {156 UIBezierPath *path = [UIBezierPath bezierPath];157 158 // 遍历已选择按钮数组159 for (int i=0; i<self.selectedButtons.count; i++) {160 HVWLockButton *button = self.selectedButtons[i];161 162 if (0 == i) {163 [path moveToPoint:button.center];164 } else {165 [path addLineToPoint:button.center];166 }167 }168 169 if (self.selectedButtons.count) {170 [path addLineToPoint:self.currentTouchLocation];171 }172 173 // 设置画笔174 [[UIColor redColor] set];175 [path setLineWidth:10];176 [path setLineCapStyle:kCGLineCapRound];177 [path setLineJoinStyle:kCGLineJoinBevel];178 179 [path stroke];180 }181 182 @end
out:
2015-01-12 16:39:23.794 HVWLockView[10274:184387] 手势解锁的输出序列:01246
[iOS UI进阶 - 5.0] 手势解锁Demo
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