iphone - 识别用户剪切/滑动手势 (UISwipeGestureRecognizer)

Question

我使用下面的代码并为'self.view'工作，但不适用于imageview和方向只能添加一个方向如何使用四个方向（右，左，uo，下）？

UISwipeGestureRecognizer *swipe =[[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:@selector(sr)];
swipe.direction =UISwipeGestureRecognizerDirectionRight;
[imageview addGestureRecognizer:swipe];
[swipe release];

Answer 1

代表们

touchesBegan: 

touchesEnded:

Answer 2

//--------在imageview分配中添加这段代码--------//

        imageview.userInteractionEnabled = YES;

对于四个方向，您必须使用两个 UISwipeGestureRecognizer：-

      UISwipeGestureRecognizer *swipeRightLeft =[[UISwipeGestureRecognizer     alloc]initWithTarget:selfaction:@selector(sr)];

   [swipeRightLeft setDirection:(UISwipeGestureRecognizerDirectionRight |UISwipeGestureRecognizerDirectionLeft )];

   [imageview addGestureRecognizer:swipeRightLeft];

    [swipeRightLeft release];

    UISwipeGestureRecognizer *swipeUpDown =[[UISwipeGestureRecognizer     alloc]initWithTarget:selfaction:@selector(sr)];

      [swipeUpDown setDirection:(UISwipeGestureRecognizerDirectionUp | UISwipeGestureRecognizerDirectionDown )];

    [imageview addGestureRecognizer:swipeUpDown];

    [swipeUpDown release];

Answer 3

尝试启用交互：

yourImageView.userInteractionEnabled = YES;

并添加一些方向，如下所示：

swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft;

Answer 4

如果您的应用程序仅在 iOS 3.2+ 上运行没问题，那么最好的方法是使用UIGestureRecognizerAPI 类。事实上，有一个UISwipeGestureRecognizer子类（文档在这里）。

做你想做的事，做这样的事情：

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(doSomething:)];
swipe.direction = UISwipeGestureRecognizerDirectionRight;
[yourImageView addGestureRecognizer:swipe];
[swipe release];

要更改为任何其他方向，请查看上面的文档链接 - 所有四个方向都有一个常量。