(仿苹果系统文件夹展开抽屉效果）like iOS springborad folder expand。.zip

# UICollectionView-SFOpenFolder UICollectionView+SFOpenFolder,a UICollectionView category,(仿苹果系统文件夹展开抽屉效果）like iOS springborad folder expand。 # usage ## import ``` #import "UICollectionView+SFOpenFolder.h" ``` ## open ``` _detail= [[DetailViewController alloc]init]; [self addChildViewController:_detail]; ``` ``` - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { [collectionView sf_openFolderAtIndexPath:indexPath contentBlock:^UIView *(id item) { _detail.view.frame = CGRectMake(0, 0, collectionView.frame.size.width, _detail.view.frame.size.height); return _detail.view; } beginningBlock:^(SFOpenStatus openStatus) { if (openStatus == SFCollectionOpenStatusOpening) { NSLog(@"begin opening"); } if (openStatus == SFCollectionOpenStatusClosing) { NSLog(@"begin closing"); } } completionBlock:^(SFOpenStatus openStatus) { if (openStatus == SFCollectionOpenStatusOpened) { NSLog(@"completion open"); } if (openStatus == SFCollectionOpenStatusClose) { NSLog(@"completion close"); } }]; } ``` ## manual close ``` - (void)sectionTouched:(UIButton*)sender{ //.... [self.myCollectionView sf_closeViewWithSelectedIndexPath:^(NSIndexPath *selectedIndexPath) { }]; //.... } ``` # demo ## when one row have many column  ## when one row have one column