UICollectionView: vue d'en-tête par programme

C'est la façon dont je suis en train d'en-tête.

  //   viewDidLoad
[self.collectionView registerClass:[UICollectionViewCell class]forCellWithReuseIdentifier:@"Cell"];
[self.collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header"];
UICollectionViewFlowLayout *layout= [[UICollectionViewFlowLayout alloc]init];
self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, 390, 300) collectionViewLayout:layout];
layout.collectionView.backgroundColor = [UIColor colorWithRed:230.0/255.0 green:230.0/255.0 blue:230.0/255.0 alpha:1.0];
[self.collectionView registerClass:[UICollectionViewCell class]
forCellWithReuseIdentifier:@"Cell"];
self.collectionView.delegate=self;
self.collectionView.dataSource=self;
layout.minimumInteritemSpacing = 15;
[layout setScrollDirection:UICollectionViewScrollDirectionVertical];
self.collectionView.collectionViewLayout = layout;
self.collectionView.showsHorizontalScrollIndicator = NO;
self.collectionView.showsVerticalScrollIndicator = NO;
[self.collectionView setBounces:YES];
self.collectionView.allowsMultipleSelection = YES;
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"HorizontalPickerCell"];
[self.view addSubview:self.collectionView];
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section
{
if (section == 0) {
return CGSizeMake(0, kHeaderHeight);
}
return CGSizeMake(0, kHeaderHeight + kInterSectionMargin);
}
- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView
{
NSLog(@"levels count:%d", [arrLevels count]);
return [arrLevels count];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
NSLog(@"vals count:%d", [arrSeats count]);
for(int i=0; i<[arrLevels count]; i++)
{
if(section == i)
{
int c;
NSString *cnt = [NSString stringWithFormat:@"%@",[arrTot objectAtIndex:i]];
c = [cnt intValue];
return c;
}
}
return 1;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
//cell.selectedBackgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"blue_s.png"]];
if (cell.selected) {
[UIColor colorWithPatternImage:[UIImage imageNamed:@"blue_s.png"]]; //highlight selection
}
else
{
cell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"yellow_seat.png"]]; //Default color
}
return cell;
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
return UIEdgeInsetsMake(10, 12, 10, 10);
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:  (UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
CGSize retval =  CGSizeMake(22, 20);
return retval;
}
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
UICollectionReusableView *reusableview = nil;
if (kind == UICollectionElementKindSectionHeader) {
UICollectionReusableView *headerView = [self.collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:nil forIndexPath:indexPath];
self.lblHeader = [[UILabel alloc]initWithFrame:CGRectMake(120, 10, 100, 30)];
self.lblHeader.backgroundColor = [UIColor whiteColor];
self.lblHeader.textColor = [UIColor redColor];
self.lblHeader.text = @"Level 1";
[self.collectionView addSubview:self.lblHeader];
}
return reusableview;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
printf("Selected View index=%d",indexPath.row);
itemPaths  = [self.collectionView indexPathsForSelectedItems];
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
cell.contentView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blue_s.png"]];
}
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
cell.contentView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"yellow_seat.png"]];
}

source d'informationauteur iPhone Programmatically