iOS 10 错误:UICollectionView 接收到具有不存在索引路径的单元格的布局属性 [英] iOS 10 bug: UICollectionView received layout attributes for a cell with an index path that does not exist

问题描述

在装有 iOS 10 的设备上运行我的应用时出现此错误:

Running my app in a device with iOS 10 I get this error:

UICollectionView 接收到一个单元格的布局属性，其索引路径不存在

在 iOS 8 和 9 中运行良好.我一直在研究，我发现这与使集合视图布局无效有关.我试图实施该解决方案但没有成功，所以我想寻求直接帮助.这是我的层次结构视图:

In iOS 8 and 9 works fine. I have been researching and I have found that is something related to invalidate the collection view layout. I tried to implement that solution with no success, so I would like to ask for direct help. This is my hierarchy view:

->Table view 
    ->Each cell of table is a custom collection view [GitHub Repo][1]
        ->Each item of collection view has another collection view

我尝试的是插入

    [self.collectionView.collectionViewLayout invalidateLayout];

在

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView

两个集合视图.

我还尝试在重新加载数据之前使布局无效，但不起作用...

Also I have tried to invalidate layout before doing a reload data, does not work...

谁能给我一些指示?

推荐答案

collectionView 中的单元格数量发生变化时发生这种情况.原来我在调用 reloadData 后丢失了 invalidateLayout.添加后，我再也没有遇到过崩溃.苹果在 iOS10 中对 collectionViews 做了一些修改.我想这就是我们在旧版本上没有遇到同样问题的原因.

This happened to me when number of cells in collectionView changed. Turns out I was missing invalidateLayout after calling reloadData. After adding it, I haven't experienced any more crashes. Apple has made some modifications to collectionViews in iOS10. I guess that's the reason why we are not experiencing same problem on older versions.

这是我的最终代码:

[self.collectionView reloadData];
[self.collectionView.collectionViewLayout invalidateLayout];

//Swift 4.2 Version
collectionView.reloadData()
collectionView.collectionViewLayout.invalidateLayout()

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