I have a UIView subclass that has a dynamically created UICollectionView. Everything works fine in ios7 with displaying the headers just fine.
iOS 8 doesn't call this method at all, and the app crashes.
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
If i comment out this method and I set to the header / footer size to 0, iOS 8 doesn't crash any more.
Here is the code to create the collection view:
int spacing = 39;
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
layout.itemSize = CGSizeMake(199, 60);
if (IS_IOS8) layout.estimatedItemSize = CGSizeMake(199, 60);
layout.scrollDirection = UICollectionViewScrollDirectionVertical;
layout.minimumInteritemSpacing = 1;
layout.minimumLineSpacing = 1;
layout.sectionInset = UIEdgeInsetsMake(1,1,1,1);
layout.headerReferenceSize = CGSizeMake(self.width - spacing*2, 50.0f);
layout.footerReferenceSize = CGSizeZero;
self.collectionView=[[UICollectionView alloc] initWithFrame:CGRectMake(spacing, 5, self.width - spacing*2, self.height - spacing*2) collectionViewLayout:layout];
self.collectionView.dataSource = self;
self.collectionView.delegate = self;
[self.collectionView registerClass:[OCEListCell class] forCellWithReuseIdentifier:CellIdentifier];
[self.collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:HeaderCellIdentifier];
[self.collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:FooterCellIdentifier];
self.collectionView.backgroundColor = [UIColor clearColor];
[self addSubview:self.collectionView];
Data Source Methods:
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
UICollectionReusableView * view = nil;
NSLog(@"viewForSupplementaryElementOfKind");
if ([kind isEqualToString:UICollectionElementKindSectionHeader] )
{
view = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:HeaderCellIdentifier forIndexPath:indexPath];
view.backgroundColor = [UIColor clearColor];
UILabel * lbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 15, view.width, 40)];
lbl.textColor = [UIColor defaultTextColor];
lbl.font = [UIFont bookFontOfSize:25.0f];
lbl.numberOfLines = 1;
lbl.text = indexPath.section == 0 ? @"Section 1 Header" : @"Section 2 Header";
[view addSubview:lbl];
}
else if ([kind isEqualToString:UICollectionElementKindSectionFooter])
{
view = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:FooterCellIdentifier forIndexPath:indexPath];
view.backgroundColor = [UIColor clearColor];
}
NSLog(@"viewForSupplementaryElementOfKind:%@", view);
return view;
}
-(CGSize) collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section
{
CGSize size = CGSizeMake(collectionView.width, 50);
NSLog(@"referenceSizeForHeaderInSection: %@", NSStringFromCGSize(size));
return size;
}
-(CGSize) collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section
{
CGSize size = CGSizeZero;
NSLog(@"referenceSizeForFooterInSection: %@", NSStringFromCGSize(size));
return size;
}
