使UIGestureRecognizer接收在子视图上开始的触摸 [英] Make UIGestureRecognizer to receive touches started on subviews

问题描述

我在一个 UIView 上附加了自定义的 UIGestureRecognizer ，该UIView几乎覆盖了整个屏幕.该视图包含一个小的子视图，该子视图也需要接收正常的触摸.

I attached a custom UIGestureRecognizer to one UIView which fills almost the whole screen. This view contains a small subview which needs to receive normal touches as well.

问题:在此子视图上开始的触摸未由附加到其父视图的识别器处理.

Problem: Touches started on this subview are not handled by the recognizer attached to its parent.

即使希望触摸子视图，我也要把gestureRecognizer放在首位并能正常工作.如何将在此子视图上开始的所有触摸都转发给其父视图，以使我的gestureRecognizer能够完成其工作?

I want the gestureRecognizer to be first priority and work even if the subview is touched. How can I forward all touches started on this subview to its parent as well in order that my gestureRecognizer can do its job?

推荐答案

我找到了解决方案！实际上很简单.

I found the solution! It's actually quite simple.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
     // Forward this message up the responder chain
     [super touchesBegan:touches withEvent: event];
}

在子视图的 touchBegan 中对super的调用就足够了.在此博客上找到它

The call to super in touchBegan of the subview is all it takes. Found it on this blog Allow superview to recieve events caught by subview

这篇关于使UIGestureRecognizer接收在子视图上开始的触摸的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！