iphone - 获取所选单元格的索引路径

Question

当用户在 UITableView 编辑模式下点击默认的 delete 按钮时，用户应该得到一个 alertview，如果他在 AlertView 中再次点击 Delete，该行应该被删除.最初，我在没有 AlertView 的情况下使用以下代码完成了此操作，并且运行良好。

  [[self categoriesArray]removeObjectAtIndex:[indexPath row]];
   NSArray *indexPathsToRemove = [NSArray arrayWithObject:indexPath];
   [self.tableView deleteRowsAtIndexPaths:indexPathsToRemove withRowAnimation:UITableViewRowAnimationLeft];
   [self.categoriesArray writeToFile:[self dataFilePath]  atomically:YES];

但是现在，因为我必须在 alertview 委托(delegate)方法中使用相同的代码。我不知道如何获取 [indexPath row]

Answer 1

将您的索引路径设置为 UIAlertView 标记并从 Delegate 获取。

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath // indexPath is here
{
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {
       UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Are you sure want to delete" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Delete", nil];
       [alertView setTag:indexPath.row]; // Assigning here.
        [alertView show];
    }
}
    // UIAlertView Delegate

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSLog(@"%d",alertView.tag); // Your Indexpath is here

**Edited:**

    NSIndexPath * path = [NSIndexPath indexPathForRow:alertView.tag inSection:0];
    [[self categoriesArray]removeObjectAtIndex:[path row]];
    NSArray * indexPathsToRemove = [NSArray arrayWithObject:path];
    [self.tableView deleteRowsAtIndexPaths:indexPathsToRemove withRowAnimation:UITableViewRowAnimationLeft];
    [self.categoriesArray writeToFile:[self dataFilePath]  atomically:YES];
}