手勢總結

只有多嘗試，多寫才能更好。

// 手勢識別器
    
    // 1.輕拍手勢
    
    // 手勢需要在定義時綁定一個觸發方法(SEL)
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
    
    // 輕拍的設置
    // 需要輕拍兩次 才響應事件
    tap.numberOfTapsRequired = 2;
    
    // 需要用幾個手指去拍
    tap.numberOfTouchesRequired = 2;
    
    // 給view添加手勢
    [imageView addGestureRecognizer:tap];
    [tap release];
    
    // 2.長按手勢
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
    
    // 長按 觸發方法 所需要的事件
    
    longPress.minimumPressDuration = 3;
    // 長按 允許用戶移動手指的距離
    longPress.allowableMovement = 100;
    
    [imageView addGestureRecognizer:longPress];
    [longPress release];
    
    // 3.輕掃手勢 (swipe)
    
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];
    
    // 設置 輕掃 的方向 (一個對象只能一個方向 要不左右 要不上下)!!!
    swipe.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
    [imageView addGestureRecognizer:swipe];

    // 4. 拖拽
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];

    [imageView addGestureRecognizer:pan];
    
    // 5.旋轉
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(roration:)];
    [imageView addGestureRecognizer:rotation];
    
    // 6.捏合手勢
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
    [imageView addGestureRecognizer:pinch];
    
    // 7.屏幕邊緣拖拽
    UIScreenEdgePanGestureRecognizer *sceenEdge = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(sceenEdgeAction:)];
    sceenEdge.edges = UIRectEdgeLeft;
    [imageView addGestureRecognizer:sceenEdge];

    // 將UIImageView的用戶交互打開,使他能響應輕拍
    [imageView setUserInteractionEnabled:YES];

- (void)tapAction:(UITapGestureRecognizer *)tap
{
    NSLog(@"輕拍");
}

- (void)longPressAction:(UILongPressGestureRecognizer *)longPress
{
    // 當長按手勢開始觸發時
    if (longPress.state == UIGestureRecognizerStateBegan) {
        NSLog(@"長按");
    }
}

- (void)swipeAction:(UISwipeGestureRecognizer *)swipe
{
    NSLog(@"輕掃");
}

- (void)panAction:(UIPanGestureRecognizer *)pan
{
    NSLog(@"拖拽");
    
    // 通過手勢的view屬性  獲取當前手勢添加到的 view
    UIImageView *imageView = (UIImageView *) pan.view;
    // 獲取到 當前手指接觸的點
    CGPoint point = [pan translationInView:imageView];
    // 讓view變形
    imageView.transform = CGAffineTransformTranslate(imageView.transform, point.x, point.y);
    [pan setTranslation:CGPointZero inView:imageView];
    
}

- (void)roration:(UIRotationGestureRecognizer *)rotation
{
    NSLog(@"旋轉");
    
    UIImageView *imageView = (UIImageView *) rotation.view;
    imageView.transform = CGAffineTransformRotate(imageView.transform, rotation.rotation);
    rotation.rotation = 0;
    
}
- (void)pinchAction:(UIPinchGestureRecognizer *)pinch
{
    NSLog(@"捏合");
    UIImageView *imageView = (UIImageView *) pinch.view;
    // 在x,y軸方向 放大/縮小
    imageView.transform = CGAffineTransformScale(imageView.transform, pinch.scale, pinch.scale);
    pinch.scale = 1;
}

- (void)sceenEdgeAction:(UIScreenEdgePanGestureRecognizer *)sceen
{
    NSLog(@"屏幕邊緣");
    
}