如何处理iPhone的单件与双触摸

Question

我想做类似于iPhone的照片查看器的事情。当您单击时，UI棒在短时间后消失了。双击时，它会放大。但是我不希望Double Tap上发生任何事情，因为我尚未实现放大。

有人知道怎么做吗？

这篇文章]并没有真正的帮助。除非你告诉我有必要子类 UIGestureRecognizer. 。然后，我想我可以弄清楚。有人有例子吗？

Answer 1

看着那（这 UITapGestureRecognizer 文档。您想查看两个属性：

• numberOfTapsRequired;和
• numberOfTouchesRequired

Answer 2

查看320的光盘。它可以做您想做的事情。

Answer 3

这是一些应有帮助的代码：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
[scrollView addGestureRecognizer:singleTap];
[singleTap release];

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
[doubleTap setNumberOfTapsRequired: 2];
[scrollView addGestureRecognizer:doubleTap];
// this next line will hold callbacks to singleTap until enough time has gone by that doubleTap is not a possibility.  If a doubleTap happens, singleTap will not get called. Otherwise, singleTap's callback gets called.
[singleTap requireGestureRecognizerToFail:doubleTap];
[doubleTap release];