这篇文章主要为大家展示了“iOS9中collectionView新特性怎么用”,内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下“iOS9中collectionView新特性怎么用”这篇文章吧。
具体用法:
1.创建collectionView并设置代理
- (UICollectionView *)collectionView{ if (_collectionView == nil) { UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init]; layout.itemSize = CGSizeMake(50, 50); _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 20, self.view.bounds.size.width, self.view.bounds.size.height) collectionViewLayout:layout]; layout.minimumLineSpacing = 10; layout.minimumInteritemSpacing = 10; [_collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"]; _collectionView.backgroundColor = [UIColor cyanColor]; _collectionView.dataSource = self; //此处给其增加长按手势,用此手势触发cell移动效果 UILongPressGestureRecognizer *longGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handlelongGesture:)]; [_collectionView addGestureRecognizer:longGesture]; } return _collectionView; }
2.设置其资源
_dataSource = [NSMutableArray array]; for (int i = 1; i <= 50; i++) { NSString *imageName = [NSString stringWithFormat:@"%d",i]; [_dataSource addObject:imageName]; }
3.监听手势,并设置其允许移动cell和交换资源
- (void)handlelongGesture:(UILongPressGestureRecognizer *)longGesture { //判断手势状态 switch (longGesture.state) { case UIGestureRecognizerStateBegan:{ //判断手势落点位置是否在路径上 NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:[longGesture locationInView:self.collectionView]]; if (indexPath == nil) { break; } //在路径上则开始移动该路径上的cell [self.collectionView beginInteractiveMovementForItemAtIndexPath:indexPath]; } break; case UIGestureRecognizerStateChanged: //移动过程当中随时更新cell位置 [self.collectionView updateInteractiveMovementTargetPosition:[longGesture locationInView:self.collectionView]]; break; case UIGestureRecognizerStateEnded: //移动结束后关闭cell移动 [self.collectionView endInteractiveMovement]; break; default: [self.collectionView cancelInteractiveMovement]; break; } } - (BOOL)collectionView:(UICollectionView *)collectionView canMoveItemAtIndexPath:(NSIndexPath *)indexPath{ //返回YES允许其item移动 return YES; } - (void)collectionView:(UICollectionView *)collectionView moveItemAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath*)destinationIndexPath { //取出源item数据 id objc = [_dataSource objectAtIndex:sourceIndexPath.item]; //从资源数组中移除该数据 [_dataSource removeObject:objc]; //将数据插入到资源数组中的目标位置上 [_dataSource insertObject:objc atIndex:destinationIndexPath.item]; }
通过以上设置便可以成功移动cell了,下面奉上效果图
以上是“iOS9中collectionView新特性怎么用”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注亿速云行业资讯频道!
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。