UI中的七種手勢，UI七種手勢

UI中的七種手勢，UI七種手勢

  1 //  2 //  GestureRecognizerViewController.m

 10  11 #import "GestureRecognizerViewController.h" 12 #import "UIColor+RandomColor.h" 13 @interface GestureRecognizerViewController () 14 { 15      16     CGRect _frame; // 用來記錄view原來的frame 17      18 } 19 @end 20  21 @implementation GestureRecognizerViewController 22  23 - (void)viewDidLoad { 24     [super viewDidLoad]; 25     // Do any additional setup after loading the view. 26 //    UIGestureRecognizer 手勢辨識器,是所有手勢識別類的基類,提供了手勢辨識器的準系統,有了手勢辨識器之後,手勢的識別全部由這個類來識別,我們就不再關心手勢識別的過程,我們只需要關心手勢識別之後應該做哪些操作,它的子類有6個,輕拍手勢,捏合手勢,長按手勢,撥動手勢,旋轉手勢,平移手勢,以及平移手勢的子類 螢幕側邊手勢 27      28     UIView *view = [[UIView alloc]initWithFrame:(CGRectMake(60, 184, 200, 200))]; 29     view.backgroundColor = [UIColor redColor]; 30     [self.view addSubview:view]; 31     [view release]; 32      33     //! 輕拍手勢  這種手勢用的最多, 跟按鈕似的 34     35     // UITapGestureRecognizer 36     /* 37     // 1. 建立輕拍手勢對象 38     UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)]; // self指視圖控制器的對象 39      40     // 2. 設定輕拍觸發方法時,需要的點擊次數  // 一定要在添加手勢之前設定 41     tapGesture.numberOfTapsRequired = 2; 42     tapGesture.numberOfTouchesRequired = 2; 43      44     // 3. 向視圖對象上添加手勢 45     [view addGestureRecognizer:tapGesture]; // 多態 父類指標指向子類對象 46 //    [view addGestureRecognizer:<#(UIGestureRecognizer *)#>] 47      48     [tapGesture release]; 49     */ 50      51     /** 52      1. 建立手勢識別類的對象(輕拍手勢/ 長按手勢/ 撥動手勢/ 平移手勢/ 捏合手勢/ 旋轉手勢/ 螢幕側邊手勢) 53       54      2. 設定手勢方法的相關屬性(如需要幾根手指,多長時間才能觸發手勢事件 等)   // 根據需要 55       56      3. 向視圖對象上添加手勢 57       58      4. 釋放手勢對象 59       60       61      */ 62      63     // 長按手勢 UILongPressGestureRecognizer 64    /* 65     UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGesture:)]; 66     // 設定長按手勢最短的觸發事件 秒為單位 67     longPressGesture.minimumPressDuration = 1; 68      69     [view addGestureRecognizer:longPressGesture]; 70      71     [longPressGesture release]; 72     */ 73      74     // 撥動手勢 UISwipeGestureRecognizer 75      76     UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)]; 77      78     // 設定撥動手勢支援的方法 (預設是向右掃) 79     // UISwipeGestureRecognizerDirectionDown 向下掃 80     swipeGesture.direction = UISwipeGestureRecognizerDirectionDown; // 一定要在添加手勢之前設定 81      82     [view addGestureRecognizer:swipeGesture]; 83      84     [swipeGesture release]; 85      86     // 一個視圖可以添加多個手勢 87     // 想要實現多個方向撥動手勢: 再添加一個撥動手勢 88     UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)]; 89     // UISwipeGestureRecognizerDirectionLeft 向左輕掃 90     swipe.direction = UISwipeGestureRecognizerDirectionLeft; 91      92     [view addGestureRecognizer:swipe]; 93     [swipe release]; 94      95      96     // 平移手勢 UIPanGestureRecognizer 97  98     UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesTure:)]; 99     100     [view addGestureRecognizer:panGesture];101     [panGesture release];102     103     104     105     // 捏合手勢 UIPinchGestureRecognizer106     107     UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];108     109 //    pinchGesture.scale110     111     [view addGestureRecognizer:pinchGesture];112     [pinchGesture release];113     114     115     116     // 旋轉手勢117     118 //    UIRotationGestureRecognizer119     UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotationGesture:)];120     [view addGestureRecognizer:rotationGesture];121     [rotationGesture release];122     123     124     // 螢幕側邊手勢 UIScreenEdgePanGestureRecognizer 是UIPanGestureRecognizer的子類125     126     UIScreenEdgePanGestureRecognizer *screenEdgePanGesture = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleScreenEdgeGesture:)];127     128     // 設定螢幕側邊手勢支援方法129     screenEdgePanGesture.edges = UIRectEdgeRight;130     // 必須讓位置和螢幕邊緣重合131     view.frame = CGRectMake(120, 50, 200, 200);132     // 使每次移動後的view回到原始位置,實現在action方法中133     _frame = view.frame;134     135     [view addGestureRecognizer:screenEdgePanGesture];136     137     138     [screenEdgePanGesture release];139     140     141 }142 #pragma mark - 輕拍手勢方法143 - (void)handleTapGesture:(UITapGestureRecognizer *)tapGesture {144     145     // 擷取輕拍手勢所在的視圖對象146     tapGesture.view.backgroundColor = [UIColor randomColor];147     148 }149 150 151 152 #pragma mark - 長按手勢方法153 - (void)handleLongPressGesture:(UILongPressGestureRecognizer *)longPressGesture {154     155     // UIGestureRecognizerStateBegan 當達到條件((longPressGesture.minimumPressDuration = 1;))界限時,觸發方法事件156     // UIGestureRecognizerStateChanged 當達到條件時,滑動,觸發157     // UIGestureRecognizerStateEnded 當達到條件,手指離開,觸發158     159     // 根據長按手勢的狀態執行160     if (longPressGesture.state == UIGestureRecognizerStateEnded) {161         162         longPressGesture.view.superview.backgroundColor = [UIColor randomColor];163 164     }165     166 }167 168 #pragma mark - 撥動手勢方法169 - (void)handleSwipeGesture:(UISwipeGestureRecognizer *)swipeGesture {170     171     swipeGesture.view.backgroundColor = [UIColor randomColor];172     173 }174 175 - (void)handleSwipe:(UISwipeGestureRecognizer *)swipe {176     177     swipe.view.backgroundColor = [UIColor randomColor];178 }179 180 181 182 #pragma mark - 平移手勢方法183 - (void)handlePanGesTure:(UIPanGestureRecognizer *)panGesture {184     185     // 1. 擷取平移增量186     CGPoint point = [panGesture translationInView:panGesture.view];187     // 2. 讓視圖的位置發生移動,以上次視圖為基準,transform 仿射變換技術 (view上所有點跟隨移動) 用了線性代數的知識188     panGesture.view.transform = CGAffineTransformTranslate(panGesture.view.transform, point.x, point.y);189     //3. 將上次的平移增量置為0190     //CGPointZero 代表一個(0, 0)的結構體 CGPointMake(0, 0)191     [panGesture setTranslation:CGPointZero inView:panGesture.view];192     193     panGesture.view.backgroundColor = [UIColor randomColor];194     195 }196 197 #pragma mark - 捏合手勢方法198 - (void)handlePinchGesture:(UIPinchGestureRecognizer *)pinchGesture {199     200     // 1.根據比例做放射變換, 也是以上次視圖為基準  Scale 比例201     pinchGesture.view.transform = CGAffineTransformScale(pinchGesture.view.transform, pinchGesture.scale, pinchGesture.scale);202     // 2.將上次的縮放比例置為1203     pinchGesture.scale = 1; // 或者[pinchGesture setScale:1];204     205     //pinchGesture.view.backgroundColor = [UIColor randomColor];206     207 }208 209 #pragma mark - 旋轉手勢方法210 - (void)handleRotationGesture:(UIRotationGestureRecognizer *)rotationGesture {211     // 1. 根據旋轉角度做放射變換,也是以上次視圖形變數為基準 rotation 旋轉,旋度212     rotationGesture.view.transform = CGAffineTransformRotate(rotationGesture.view.transform, rotationGesture.rotation);213     // 2. 將上次的旋轉角度清零214     rotationGesture.rotation = 0;215     216     217     218 }219 220 #pragma mark - 側邊手勢方法221 // 方法和UIPanGestureRecognizer(平移手勢)一樣222 - (void)handleScreenEdgeGesture:(UIScreenEdgePanGestureRecognizer *)screenEdgeGesture {223     224     // 手指離開的時候 ,view回到原來的位置225     if (screenEdgeGesture.state == UIGestureRecognizerStateEnded) {226         227         screenEdgeGesture.view.frame = _frame;228     }229     230     // 1.擷取手指的平移增量231     CGPoint point = [screenEdgeGesture translationInView:screenEdgeGesture.view];232     // 2.根據平移增量做仿射變換233     screenEdgeGesture.view.transform = CGAffineTransformTranslate(screenEdgeGesture.view.transform, point.x, point.y);234     // 3. 把平移增量置為0的結構體235     [screenEdgeGesture setTranslation:CGPointZero inView:screenEdgeGesture.view];236     237     //screenEdgeGesture.view.frame = _frame;238     //NSLog(@"觸發了");239     240 }241 242 - (void)didReceiveMemoryWarning {243     [super didReceiveMemoryWarning];244     // Dispose of any resources that can be recreated.245 }246 /*247 #pragma mark - Navigation248 249 // In a storyboard-based application, you will often want to do a little preparation before navigation250 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {251     // Get the new view controller using [segue destinationViewController].252     // Pass the selected object to the new view controller.253 }254 */255 256 @end

 

隨機顏色

1 //2 //  UIColor+RandomColor.h3 //  UILessonTouch-044 5 #import <UIKit/UIKit.h>6 7 @interface UIColor (RandomColor)8 + (UIColor *)randomColor;9 @end

 1 // 2 //  UIColor+RandomColor.m 3 //  UILessonTouch-04 4  5 #import "UIColor+RandomColor.h" 6 #define kColorValue arc4random_uniform(256) / 255.0 7 @implementation UIColor (RandomColor) 8  9 + (UIColor *)randomColor {10     11     return [UIColor colorWithRed:kColorValue green:kColorValue blue:kColorValue alpha:kColorValue];12     13 }14 15 @end