Question

2014-07-24 11:50:15.925  *** Assertion failure in -[UICollectionViewData layoutAttributesForSupplementaryElementOfKind:atIndexPath:], /SourceCache/UIKit/UIKit-2935.137/UICollectionViewData.m:787

2014-07-24 11:50:15.927  *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'no UICollectionViewLayoutAttributes instance for -layoutAttributesForSupplementaryElementOfKind: UICollectionElementKindSectionFooter at path <NSIndexPath: 0xc000000000000016> {length = 2, path = 0 - 0}'

当我滚动我的集合视图时，我发生此错误消息，我完全不知道怎么会发生这种情况？任何帮助的建议都要感恩。

寄存器

[self.collectionView registerClass:[CollectionViewFooter class]
            forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"CollectionViewFooter"];

代表方法

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
    //declare the reusable view of header and footer
    UICollectionReusableView *reusableview = nil;

    CollectionViewFooter *footer=nil;


    if([kind isEqual:UICollectionElementKindSectionFooter])
    {
        footer = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"CollectionViewFooter" forIndexPath:indexPath];

        //attach the footer to reusable view
        reusableview = footer;
    }


    return reusableview;
}

按断点检查，到达线路时发生错误 [self.collectionView performBatchUpdates:^{

layoutAttributesForSupplementaryElementOfKind没有UICollectionViewLayoutAttributes实例？

0 个答案: