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如果实现了代理方法返回头部脚部视图，如果我只返回头部脚部返回nil会直接崩溃 #9

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zhangxiongwen opened this issue Jul 4, 2020 · 0 comments

zhangxiongwen commented Jul 4, 2020

//返回头脚视图

(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
if ([kind isEqualToString:UICollectionElementKindSectionHeader]) {
// CollectionHeaderAndFooterView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"sectionHeader" forIndexPath:indexPath];
// headerView.titleLabel.text = @"头视图";
// headerView.titleLabel.backgroundColor = [UIColor orangeColor];
// return headerView;
return nil;

}else{
CollectionHeaderAndFooterView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"sectionFooter" forIndexPath:indexPath];
footerView.titleLabel.text = @"脚视图";
footerView.titleLabel.backgroundColor = [UIColor cyanColor];
return footerView;

}
}

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