How can I change the scroll direction in UICollectionView?
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];[flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];Note too that it seems to be fine to call this in prepareForLayout in your flow layout...
@interface LayoutHorizontalThings : UICollectionViewFlowLayout@end@implementation LayoutHorizontalBooks-(void)prepareLayout { [super prepareLayout]; self.scrollDirection = UICollectionViewScrollDirectionHorizontal; self.minimumInteritemSpacing = 0; self.minimumLineSpacing = 0; self.itemSize = CGSizeMake(110,130); self.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0); }
Swift 4 and 4.2
if let layout = collectionViewObj.collectionViewLayout as? UICollectionViewFlowLayout { layout.scrollDirection = .vertical // .horizontal }