来自 iOS7 的 UICollectionViewLayoutAttributes 中的 UICollectionView 异常

Question

我已经使用 CustomLayout 在 CollectionView 中完成了一个 View 。在 iOS6 中它运行得很好，但在 iOS7 中它抛出了这样的异常。

由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因:

'layout attributes for supplementary item at index path ( {length = 2, path = 0 - 0}) changed from CustomSupplementaryAttributes: 0xd1123a0 index path: (NSIndexPath: 0xd112580 {length = 2, path = 0 - 0}); element kind: (identifier); frame = (0 0; 1135.66 45); zIndex = -1; to CustomSupplementaryAttributes: 0xd583c80 index path: (NSIndexPath: 0xd583c70 {length = 2, path = 0 - 0}); element kind: (identifier); frame = (0 0; 1135.66 45); zIndex = -1; without invalidating the layout'

Answer 1

您需要在更新之前使现有布局无效，请参阅错误消息的末尾:

without invalidating the layout'

[collectionViewLayout invalidateLayout];

Apple Documentation for UICollectionViewLayout