在UICollectionView下面插入子视图 [英] Inserting Subview Below UICollectionView

问题描述

当我在UICollectionView下面添加一个子视图时，有时该子视图显示在UICollectionView单元上方.这是子视图的插入代码:

When I add a subview below a UICollectionView, sometimes the subview shows up above the UICollectionView cells. Here is the subview insertion code:

[self.collectionView insertSubview:self.garmentView atIndex:0];

不确定我是否遵循最佳实践或是否缺少明显的东西.任何帮助表示赞赏.

Not sure if I'm not following a best practice or otherwise missing something obvious. Any assistance appreciated.

**编辑**可能值得注意的是，只有在最右边的单元格被放大时，这种情况才会在横向中发生.

** Edit ** It might be worth noting that this only happens in landscape, when the rightmost cell is zoomed in.

推荐答案

我认为

self.garmentView.layer.zPosition = -1
[self.collectionView insertSubview:self.garmentView atIndex:0];

将解决您的问题.我的猜测是，添加视图单元格的索引可能比服装视图的索引低.请参阅此问题，以更全面地讨论子视图位置.

will solve your problem. My guess is that it can happen that the collection view cells gets added with a lower index than your garmentView. See this question for a more thorough discussion about subview positions.

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