如何测试一个点是否在视图中 [英] How to test if a point is in a view

问题描述

我有一个 UIImageView 并且我有一个 CGPoint 在屏幕上.我希望能够测试该点以查看它是否在 UIImageView 中.这样做的最佳方法是什么?

I have a UIImageView and I have a CGPoint on the screen. I want to be able to test that point to see if it is in the UIImageView. What would be the best way to do this?

推荐答案

CGPoint 不好用参考点.如果您的点在窗口坐标中，那么您可以使用

CGPoint is no good with a reference point. If your point is in window's coordinates then you can get it using

CGPoint locationInView = [imageView convertPoint:point fromView:imageView.window];
if ( CGRectContainsPoint(imageView.bounds, locationInView) ) {
    // Point lies inside the bounds.
}

您也可以调用pointInside:withEvent: 方法

You may also call pointInside:withEvent: method

if ( [imageView pointInside:locationInView withEvent:nil] ) {
    // Point lies inside the bounds
}

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