如何获取UICollectionView的矩形框

Question

我希望能够定位UICollectionView中节头的框架。对于UITableView，我遇到了类似的情况，我可以通过以下方式获取其矩形：

 CGRect rect = [self.tableView rectForHeaderInSection:section];

有没有一种方法可以在UICollectionView中获得相同的结果？谢谢！

- tsuyoski

Answer 1

抱歉，伙计们。其实这很容易。

 NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:section];
 UICollectionViewLayoutAttributes *attributes = [self.collectionView layoutAttributesForSupplementaryElementOfKind:UICollectionElementKindSectionHeader atIndexPath:indexPath];
 CGRect rect = [attributes frame];

- tsuyoski

Answer 2

@tsuyoski的答案的Swift版本：

let section = 0 // or whatever section you're interested in

let indexPath = IndexPath(item: 0, section: section)
let attributes = collectionView.layoutAttributesForSupplementaryElement(ofKind: UICollectionView.elementKindSectionHeader, at: indexPath)
guard let rect = attributes?.frame else { return }

- Lance Samaria