手勢 UISwipeGestureRecognizer 輕掃手勢

UISwipeGestureRecognizer * swipeGesture = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGesture:)];

     輕掃方向

     UISwipeGestureRecognizerDirectionRight

     UISwipeGestureRecognizerDirectionLeft

     UISwipeGestureRecognizerDirectionUp

     UISwipeGestureRecognizerDirectionDown

設定輕掃方向,讓左右方向都存在 隻要枚舉值中又左移運算符,代表枚舉值可以通過按位或 | 讓多個枚舉值存在

warning :::::上下 和左右方向 在一個手勢識别器中不能同時存在

如果想要上下左右四個方法都有,就要建立兩個輕掃手勢對象,一個支援上下,一個支援左右.

   swipeGesture.direction =  UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight ;

   [redView addGestureRecognizer:swipeGesture];

   [swipeGesture release];

- (void)swipeGesture :(UISwipeGestureRecognizer *)swipeGesture

{

    NSLog(@"%u", swipeGesture.direction);

    swipeGesture.view.backgroundColor = [UIColor random];

}

轉載于:https://blog.51cto.com/qccccc/1554908