Question

在我的应用中。我想当用户选择任何行时，它将显示带有textfield的警报，以便用户写入文本并显示detailtext标签。我从警报文本中获取了文本，但我无法获取索引选择哪一行以及何时显示文本。这是我的代码

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self.tblView deselectRowAtIndexPath:indexPath animated:YES];

    if([arrProductData containsObject:[arrProduct objectAtIndex:indexPath.row]])
    {
        [arrProductData removeObject:[arrProduct objectAtIndex:indexPath.row]];
    } else
    {
        [arrProductData addObject:[arrProduct objectAtIndex:indexPath.row]];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Add Quantity"
                                                        message:@"Please enter quantity"
                                                       delegate:self
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:@"Cancel", nil];
        alert.alertViewStyle = UIAlertViewStylePlainTextInput;
        [alert show];
    }
    [tableView reloadData];
}

警报措施方法

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0) {
        arrQuantity = [[NSMutableArray alloc]init];
        [arrQuantity addObject:[alertView textFieldAtIndex:0].text];
        NSLog(@"%@", [alertView textFieldAtIndex:0].text);
        [self.tblView reloadData];
    }
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath] ;

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }

    if (tableView == self.tblView)
    {
      cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",[arrQuantity objectAtIndex:indexPath.row]];
    }

        if([arrProductData containsObject:[arrProduct objectAtIndex:indexPath.row]])
        {
            [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
        }
        else
        {
            [cell setAccessoryType:UITableViewCellAccessoryNone];
        }
    }
}

我也使用两个表view.so当我点击确定应用程序将崩溃我得到错误数组bounds.please帮助我

Answer 1

您可以添加说明

[alert setTag:indexPath.row];

之前[alert show];

在if alertView的{{1}} clickedButtonAtIndex方法中，您可以打印索引，就像验证一样

if (buttonIndex == 0)

Answer 2

将tag设置为alertView作为表的索引。

alert.tag = indexPath.row;   //This will give you indexPath for clicked row.

Answer 3

我明白了

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath] ;

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }

    if (tableView == self.tblView)
    {
        NSDictionary *dict = [arrProduct objectAtIndex:indexPath.row];

        NSLog(@"");


        cell.textLabel.text = [NSString stringWithFormat:@"%@",[dict valueForKey:@"product_name"]];

        if (selectedIndex == indexPath.row)
        {
            cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",[arrQuantity objectAtIndex:selectedIndex]];
        }

        if([arrProductData containsObject:[arrProduct objectAtIndex:indexPath.row]])
        {
            [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
        }
        else
        {
            [cell setAccessoryType:UITableViewCellAccessoryNone];
        }
    }
}

Answer 4

@property（nonatomic，strong）NSMutableDictionary * arrQuantity;

在viewDidLoad中：
arrQuantity = [[NSMutableDictionary alloc] init];

[alert setTag:indexPath.row];

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSMutableDictionary *arrQuantity;
    if (buttonIndex == 0) {
       NSString *text = [alertView textFieldAtIndex:0].text;
       if (text.length > 0) {
           [arrQuantity setObject:text forKey:@(alertView.tag)];
           [self.tblView reloadData];
       }
   }
}

修改cellForRowAtIndexPath：

if (tableView == self.tblView)
{
    NSString *text = arrQuantity[@(indexPath.row)];
    if (text.length) {
        cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",arrQuantity[@(indexPath.row)]];
    }
}

TableView没有使用带有textfield的alertview获取索引

4 个答案: