如何取消/重置UIGestureRecognizer

我如何取消或重置UIGestureRecognizer ？ 问题是，如果在手势过程中将waitForSomething设置为NO ，则下一个事件是UIGestureRecognizerStateChanged 。 但是第一个事件应该是UIGestureRecognizerStateBegan 。

我的代码：

 - (void) panned:(UIPanGestureRecognizer *) recognizer { if (waitForSomething) { // cancel or reset the recognizer! // because the next event should be UIGestureRecognizerStateBegan and not UIGestureRecognizerStateChanged return; } switch (recognizer.state) { case UIGestureRecognizerStateBegan: // important initialisation code break; case UIGestureRecognizerStateChanged: // do something break; } } 

谢谢你的帮助！

Answer 1

我知道了！ 🙂

也许别人跑这个问题，这里是解决办法：

 if (waitForSomething) { recognizer.enabled = NO; recognizer.enabled = YES; return; } 

下一个事件将是UIGestureRecognizerStateFailed随后是UIGestureRecognizerStateBegan 。

Answer 2

Swift 4：

 if waitForSomething { recognizer.isEnabled = false recognizer.isEnabled = true return }