UICollectionView/UIScrollView滚动到指定的行

// 如果调用scrollToItemAtIndexPath不起作用
    // 需要先调用layoutIfNeeded方法
    [self layoutIfNeeded];
    [_checkCollectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:_selectedCheckRow inSection:0] atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];

    [_recordCollectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:_selectedRecordRow inSection:0] atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];// 如果调用scrollToItemAtIndexPath不起作用
    // 需要先调用