每次用戶點擊collection view中的cell:
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
需要修改一個標題中的label:
UICollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"Header" forIndexPath:indexPath];
UILabel *headerTitle=(UILabel *)[headerView viewWithTag:1];
headerTitle.text=@"test";
每次tag都設置正確,但是內容並沒改變,謝謝
UICollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"Header" forIndexPath:indexPath];
if(!headerView)
{
headerView = [[UICollectionReusableView alloc] initwith.....];
}
UILabel *headerTitle=(UILabel *)[headerView viewWithTag:1];
headerTitle.text=@"test";
另外你的view的tag設置成根據indexPath 來確定.