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This is the way i am working on header. // 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

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