ios - 将 UICollectionView 滚动到节标题 View

Question

下面的代码滚动到 UICollectionView 中的右侧单元格，但在我的例子中，部分标题 View 隐藏在 UINavigationBar 后面。我相信我应该使用 scrollRectToVisible 而我的问题是，当 numberOfRows 在给定的 section 是可变的。

- (void)scrollToPricing:(NSUInteger)row {

    [self.collectionView scrollToItemAtIndexPath:
      [NSIndexPath indexPathForItem:0 
                          inSection:row] 
                   atScrollPosition:UICollectionViewScrollPositionTop 
                           animated:YES];
}

Answer 1

似乎所有的答案都过于复杂。这对我有用:

let attributes = self.collectionView.collectionViewLayout.layoutAttributesForSupplementaryViewOfKind(UICollectionElementKindSectionHeader, atIndexPath: NSIndexPath(forItem: 0, inSection: section))

self.collectionView.setContentOffset(CGPointMake(0, attributes!.frame.origin.y - self.collectionView.contentInset.top), animated: true)

swift 3:

if let attributes = collectionView.collectionViewLayout.layoutAttributesForSupplementaryView(ofKind: UICollectionElementKindSectionHeader, at: IndexPath(item: 0, section: section)) {
    collectionView.setContentOffset(CGPoint(x: 0, y: attributes.frame.origin.y - collectionView.contentInset.top), animated: true)
}