static NSString *identify = @"collectionViewCell";static NSString *identifier = @"Cell";

//UICollectionView    flowLayout = [[UICollectionViewFlowLayout alloc]init];    [flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];//设置其布局方向    flowLayout.sectionInset = UIEdgeInsetsMake(5, 10, 5, 10);//设置其边界    //显示尾部视图的很重要的一行代码，不写:imp:呵呵flowLayout.footerReferenceSize = CGSizeMake(screenWidth, 105);    _collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, imagView.bottom+10, screenWidth, screenHeight-64-21) collectionViewLayout:flowLayout];    _collectionView.dataSource = self;    _collectionView.delegate = self;    _collectionView.backgroundColor = [UIColor clearColor];//注册    [_collectionView registerClass:[MyCollectionViewCell class] forCellWithReuseIdentifier:identify];    [self.view addSubview:_collectionView];    //注册尾部视图    [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:_UICollectionElementKindSectionFooter_ withReuseIdentifier:identifier];

//创建视图方法-(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{    UICollectionReusableView *view = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:identifier forIndexPath:indexPath];     view.backgroundColor = [UIColor blueColor];    return view;}