ios 如何检测子视图中的点击手势
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How to detect a tap gesture in subviews
提问by Fitzy
Quick question: how do i detect if a tap gesture recognizer is within a subview of the view it is added to? Eg. if i click on an object such as a square that has been added as a subview to a background which a tap gesture recognizer has been added to, how do I detect that it has been tapped?
快速问题：我如何检测点击手势识别器是否在它添加到的视图的子视图中？例如。如果我单击一个对象，例如已作为子视图添加到已添加轻敲手势识别器的背景中的正方形，我如何检测它已被轻敲？
回答by Brandon A
You can grab the point of the tap off the gesture recognizer when your handler method is called respective to any view you wish using -locationInView:. Then, use the following method on UIView: - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)eventto get a reference to the actual sub view that was tapped remembering that the point you pass in is in the same coordinate space as the view.
当您的处理程序方法针对您希望使用的任何视图调用时，您可以抓住手势识别器的点击点-locationInView:。然后，在 UIView 上使用以下方法：- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event获取对被点击的实际子视图的引用，记住您传入的点与视图在相同的坐标空间中。
Some code to get you started:
一些帮助您入门的代码：
CGPoint point = [tapGestureRecognizer locationInView:parentView];
UIView *tappedView = [parentView hitTest:point withEvent:nil];
For hit testing to work the view needs to have the userInteractionEnabledproperty set to YES. Many views, such as UILabels have this set to NOby default. So prior to the above:
要进行命中测试，视图需要将userInteractionEnabled属性设置为YES. 许多视图，例如UILabelsNO默认设置为。所以在上述之前：
self.subviewOfInterest.userInteractionEnabled = YES;
回答by lu yuan
maybe you should set as: subviews.userInteractionEnabled = YES;good luck!
也许你应该设置为： subviews.userInteractionEnabled = YES; 祝你好运！
