ios - 在 iOS 中显示关于滑动删除的警告

Question

我是 iOS 的初学者。我正在执行滑动删除选项。我想在删除行之前显示警报 View 。我该如何执行此操作。

- (void)tableView:(UITableView *)tableView commitEditingStyle:
  (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"%@",collisionsArray);
if (editingStyle == UITableViewCellEditingStyleDelete)
{       
  NSUserDefaults *userinfo = [NSUserDefaults standardUserDefaults];
  NSString *userId = [userinfo valueForKey:@"user_id"];
  if(userId!=nil)
  {
  NSDictionary* dict = [collisionsArray objectAtIndex:indexPath.section];
  collisionId = [NSString stringWithFormat:@"%@",[dict valueForKey:@"collisionId"]];
  NSLog(@"%@",collisionId);
// removes saved datas from database
  BOOL result =  [database removeCollisionDetails:collisionId:@"accident_report"];
    if(result)
    {  
    [[SHKActivityIndicator currentIndicator] 
    displayCompleted:NSLocalizedString(@"val_sucess_vehicle", nil)];
    [self.navigationController popViewControllerAnimated:YES];
    }
    else
    {
    [[SHKActivityIndicator currentIndicator]
    displayCompleted:NSLocalizedString(@"val_error", nil)];
    }
  }
}
[self.tableView reloadData];
}

Answer 1

为此你可以只显示一个 alet View :

if (editingStyle == UITableViewCellEditingStyleDelete){
 // Show your alert view
 // Set its delegate to self
}

现在你必须做类似的事情:

#pragma mark ---- Delegate for alertview ----
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSUserDefaults *userinfo = [NSUserDefaults standardUserDefaults];
    NSString *userId = [userinfo valueForKey:@"user_id"];
    if(userId!=nil)
    {
        NSDictionary* dict = [collisionsArray objectAtIndex:indexPath.section];
        collisionId = [NSString stringWithFormat:@"%@",[dict valueForKey:@"collisionId"]];
        NSLog(@"%@",collisionId);
// removes saved datas from database
            BOOL result =  [database removeCollisionDetails:collisionId:@"accident_report"];
        if(result)
            {  
                [[SHKActivityIndicator currentIndicator] displayCompleted:NSLocalizedString(@"val_sucess_vehicle", nil)];
                [self.navigationController popViewControllerAnimated:YES];
            }



 else
        {
            [[SHKActivityIndicator currentIndicator] displayCompleted:NSLocalizedString(@"val_error", nil)];
        }
        }
    }