Ios 从UICollectionView中删除项目

我有一组图像显示在

UICollectionView

中。当用户点击一个图像时，它会生成一个

UIActionSheet

，其中包含该图像的一些选项。其中一个id从

UICollectionView

中删除照片。当用户在

ui操作表

中选择删除按钮时，会弹出一个警报视图，要求确认。如果用户选择“是”，则应删除照片

我的问题是，要从

UICollectionView

中删除该项，必须将

indepath

传递给

deleteItemsAndExpaths

事件。由于最终确认是在警报视图的

didDismissWithButtonIndex

事件中授予的，因此我无法找到从那里获取所选图像的

indepath

以将其传递到

deleteItemsIndepath

事件的方法。我该怎么做

这是我的密码：

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            deletePhotoConfirmAlert = [[UIAlertView alloc] initWithTitle:@"Remove Photo"
                                                                 message:@"Do you want to remove this photo?"
                                                                delegate:self
                                                       cancelButtonTitle:@"Cancel"
                                                       otherButtonTitles:nil, nil];
            [deletePhotoConfirmAlert addButtonWithTitle:@"Yes"];
            [deletePhotoConfirmAlert show];

            break;
        case 1:
            NSLog(@"To Edit photo");
            break;
    }
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (alertView == deletePhotoConfirmAlert) {
        if (buttonIndex == 1) {
            // Permission to delete the button is granted here.
            // From here deleteItemsAtIndexPaths event should be called with the indexPath
        }
    }
}

- (void)deleteItemsAtIndexPaths:(NSArray *)indexPaths
{

}

---

为什么不使用[self.collectionView indexPathsForSelectedItems]。我这样做是为了一次删除多个图像

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
  if (alertView == deletePhotoConfirmAlert) {
    if (buttonIndex == 1) {
        // Permission to delete the button is granted here.
        NSArray *selectedItemsIndexPaths = [self.collectionView indexPathsForSelectedItems];

       // Delete the items from the data source.
        [self deleteItemsFromDataSourceAtIndexPaths:selectedItemsIndexPaths];

        // Now delete the items from the collection view.
        [self.collectionView deleteItemsAtIndexPaths:selectedItemsIndexPaths];
    }
  }
}

// This method is for deleting the selected images from the data source array
-(void)deleteItemsFromDataSourceAtIndexPaths:(NSArray  *)itemPaths {
   NSMutableIndexSet *indexSet = [NSMutableIndexSet indexSet];
   for (NSIndexPath *itemPath  in itemPaths) {
     [indexSet addIndex:itemPath.row];
   }
   [self.images removeObjectsAtIndexes:indexSet]; // self.images is my data source
}

编辑

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
   NSArray *indexpaths = [self.collectionView indexPathsForSelectedItems];
   DetailViewController *dest = [segue destinationViewController];
   dest.imageName = [self.images objectAtIndex:[[indexpaths objectAtIndex:0] row]];
}

---

我得到了一个不可见的@interface for'SomeViewController'在第行声明所选的'deleteItemsFromDataSourceAtIndexPaths'错误，

[self-deleteItemsFromDataSourceAtIndexPaths:selectedItemsIndexPaths].Sory我忘了指出deleteItemsFromDataSourceAtIndexPaths是我的自定义函数，用于从数据源数组中删除选定的图像。您可以直接在那里自己进行操作。在调用DeleteItemsAndExpaths之前，从数据源数组中删除图像非常重要：我明白了。现在，我尝试使用
removeObjectAtIndex
从数据源数组中删除图像。但是，由于它需要一个整数值，如何从
selectedItemsIndexPaths
数组中获取该值？工作非常完美。非常感谢，阿尼尔：）您好，有没有办法从
NSMutableIndexSet
中获取单个索引？