Question

uicollectionview 默认的uicollectionviewcell的布局是怎样的

Answer 1

UICollectionViewFlowLayout * flowLayout = [[UICollectionViewFlowLayout alloc]init];

[flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
flowLayout.itemSize = CGSizeMake(70, 100);

UICollectionView有个属性，
@property (nonatomic, retain) UICollectionViewLayout *collectionViewLayout;
直接设置皆可以了，
[self.collectionView setCollectionViewLayout:flowLayout];