有没有办法知道哪个集合视图单元格在特定点? [英] Is there any way to know which collection view cell is at a specific point?

问题描述

我有一个 CGPoint，我想知道我的集合视图中的哪个单元格当前包含该点.有什么简单的方法可以做到这一点还是我必须编写自己的方法?

I have a CGPoint and I would like to know which cell from my collection view currently contains that point. Is there any simple way to do this or do I have to write my own method?

推荐答案

UICollectionView我用的不多，但是有一个方法看起来很完美:

I haven't used UICollectionViews much, but there's a method that seems perfect:

- (NSIndexPath *)indexPathForItemAtPoint:(CGPoint)point;

传递给方法的点必须在集合视图的坐标系内.你可以这样做:

The point you pass to the method has to be within the coordinate system of the collection view. You can do:

CGPoint convertedPoint = [collectionView convertPoint:point fromView:viewThatYouGotThePointFrom];

获得正确的观点，如果您得到的观点最初不是来自集合视图.

to get the correct point, if the point you got isn't from the collection view originally.

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