【iOS開發-手勢】iOS中各種手勢總結

標籤：手勢觸摸

iOS中支援的手勢事件

1. UITapGestureRecognizer(敲擊)
2. UIPinchGestureRecognizer(捏合，用於縮放)
3. UIPanGestureRecognizer(拖拽)
4. UISwipeGestureRecognizer(輕掃)
5. UIRotationGestureRecognizer(旋轉)
6. UILongPressGestureRecognizer(長按)

UITapGestureRecognizer(敲擊)

//建立UITapGestureRecognizer對象，並且初始化的時候就綁定事件  UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapView)]; //連擊幾次才觸發事件   recognizer.numberOfTapsRequired = 2; //在對應的View上添加這個手勢監聽   [self.myView addGestureRecognizer:recognizer];

UILongPressGestureRecognizer（長按）

//建立UILongPressGestureRecognizer對象，並初始化的時候就綁定事件    UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(tapView)];recognizer.minimumPressDuration = 2;//2秒後觸發事件[self.myView addGestureRecognizer:recognizer];

UISwipeGestureRecognizer(輕掃)

 //建立UISwipeGestureRecognizer對象    UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tapView)];    //手勢掃的方向recognizer.direction = UISwipeGestureRecognizerDirectionLeft;[self.myView addGestureRecognizer:recognizer];

UIRotationGestureRecognizer(旋轉)例子：旋轉一個view

- (void)Rotate{//建立對象    UIRotationGestureRecognizer *recognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateView:)];    recognizer.delegate = self;//每一個View要想支援多個手勢，就要實現這個代理    [self.iconView addGestureRecognizer:recognizer];}//執行這個方法時候，會預設把旋轉對象傳過去- (void)rotateView:(UIRotationGestureRecognizer *)recognizer{//recognizer.rotation等於旋轉角度，加上前一個他的前一個角度，所以每次把前一個角度清0，這個值就等於旋轉角度//每次要把當前的transform+旋轉的角度    recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation);    //要把旋轉的角度設為0    recognizer.rotation = 0; }

UIPinchGestureRecognizer(捏合)

- (void)Pinch{    //建立對象    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchView:)];    pinch.delegate = self;    [self.iconView addGestureRecognizer:pinch];}- (void)pinchView:(UIPinchGestureRecognizer *)pinch{    pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);    pinch.scale = 1; }

UIPanGestureRecognizer(拖拽)

- (void)viewDidLoad{    [super viewDidLoad];    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panView:)];    [self.purpleView addGestureRecognizer:pan];}- (void)panView:(UIPanGestureRecognizer *)pan{    switch (pan.state) {        case UIGestureRecognizerStateBegan: // 開始觸發手勢            break;        case UIGestureRecognizerStateEnded: // 手勢結束            break;        default:            break;    }    // 1.在view上面挪動的距離    CGPoint translation = [pan translationInView:pan.view];    CGPoint center = pan.view.center;    center.x += translation.x;    center.y += translation.y;    pan.view.center = center;    // 2.清空移動的距離    [pan setTranslation:CGPointZero inView:pan.view];}

多手勢的支援

目標View要想支援多個手勢的必須實現UIGestureRecognizerDelegate代理
然後實現下面的方法

/** *  是否允許多個手勢辨識器同時有效 *  Simultaneously : 同時地 */- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{    return YES;}

【iOS開發-手勢】iOS中各種手勢總結