iphone - UICollectionView 的补充 View 或装饰 View 的索引路径是什么？

Question

indexpath 对 UICollectionView 的 supplementaryView 或 decorationView 意味着什么？

layoutAttributesForSupplementaryViewOfKind:atIndexPath: 
layoutAttributesForDecorationViewOfKind:atIndexPath:

Answer 1

这Documentation说:

It is up to you to decide how to use the indexPath parameter to identify a given supplementary view. Typically, you use the elementKind parameter to identify the type of the supplementary view and the indexPath information to distinguish between different instances of that view.

装饰 View 也是如此。

换句话说，对应于数据源中某个位置的单元格索引路径与对应于您想要的任何内容的补充 View 或装饰 View 的索引路径之间绝对没有关联。