ios – UICollectionView滚动到任何页脚或标题视图

- (void)scrollToBottom {
        NSInteger section = [self numberOfSectionsInCollectionView:self.collectionView] - 1;
        NSInteger item = [self collectionView:self.collectionView numberOfItemsInSection:section] - 1;
        if ((section > 0) && (item > 0)) {
            NSIndexPath * lasTindexPath = [NSIndexPath indexPathForItem:item inSection:section];
            [self.collectionView scrollToItemATindexPath:lasTindexPath atScrollPosition:UICollectionViewScrollPositionBottom animated:NO];
        }
}

我知道这是一个老问题,但我最近遇到了同样的问题.我找到的最好的解决方案是来自Gene De Lisa的 http://www.rockhoppertech.com/blog/scroll-to-uicollectionview-header/,因为你似乎在Obj-C工作,这里是我使用的Swift代码的端口：

-(void) scrollToSectionHeader:(int)section {    
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:section];
    UICollectionViewLayoutAttributes *attribs = [self.collectionView layoutAttributesForSupplementaryElementOfKind:UICollectionElementKindSectionHeader aTindexPath:indexPath];
    CGPoint topOfHeader = CGPointMake(0,attribs.frame.origin.y - self.collectionView.contenTinset.top);
    [self.collectionView setContentOffset:topOfHeader animated:YES];
}

上面的代码将正确滚动到给定部分的标题(我需要的全部).修改它以滚动到页脚是很简单的：

-(void) scrollToSectionFooter:(int)section {    
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:section];
    UICollectionViewLayoutAttributes *attribs = [self.collectionView layoutAttributesForSupplementaryElementOfKind:UICollectionElementKindSectionFooter aTindexPath:indexPath];
    CGPoint topOfFooter = CGPointMake(0,attribs.frame.origin.y - self.collectionView.contenTinset.top);
    [self.collectionView setContentOffset:topOfFooter animated:YES];
}