UICollectionViewCell上显示编辑菜单

最新推荐文章于 2025-09-12 11:20:22 发布

翻译最新推荐文章于 2025-09-12 11:20:22 发布 · 5.1k 阅读

文章标签：

#UICollectionView #UICollectionViewCell #编辑 #UIPasteboard #contextualMenu

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本文介绍如何在UICollectionView中实现自定义的上下文编辑菜单，包括显示菜单、确定可用的编辑操作及执行具体操作的方法。通过示例代码展示了如何仅启用复制功能，并将选中的图片保存到剪贴板。

1。显示编辑菜单（如复制，粘贴等）

- (BOOL)collectionView:(UICollectionView *)collectionView shouldShowMenuForItemAtIndexPath:(NSIndexPath *)indexPath //是否显示菜单

- (BOOL)collectionView:(UICollectionView *)collectionView canPerformAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender //菜单中哪些编辑操作可以显示

- (void)collectionView:(UICollectionView *)collectionView performAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender //对于显示的编辑操作怎么执行

e.g.

- (BOOL) collectionView:(UICollectionView *)collectionView shouldShowMenuForItemAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
- (BOOL) collectionView:(UICollectionView *)collectionView  canPerformAction:(SEL)action  forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender{
if (action == @selector(copy:)){
return YES; //此处只显示copy
}
return NO;
}
- (void) collectionView:(UICollectionView *)collectionView  performAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath  withSender:(id)sender{
if (action == @selector(copy:)){
MyCollectionViewCell *cell = (MyCollectionViewCell *)[collectionView  cellForItemAtIndexPath:indexPath];
[[UIPasteboard generalPasteboard] setImage:cell.imageViewBackgroundImage.image]; //剪贴板存储
}
}