Question

我在该单元格中有一个表视图是自定义的。我在表格视图的每个单元格上添加了两个按钮。当我同时点击第一个按钮时，同一个单元格中的第二个按钮正在改变其图像。为此，我有editQuantity和Cancelorder方法。使用@sel。我得到一个问题，当我点击第一个按钮，更改相同的单元格另一个按钮，它更改另一个单元格按钮，当我滚动表视图其损失所有选择按钮

Here Is My Code--

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath
{

simpleTableIdentifier = @"MenuNameCell";
    MenuNameCell *cell = (MenuNameCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
   if (cell== nil) {
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"MenuNameCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
        NSLog(@"---------new cell agin");   
    }
       else
    {
        NSArray *arrayView = [cell.contentView subviews];
        for (UIView *vTemp in arrayView)
        {
            [vTemp removeFromSuperview];
        }

        NSLog(@"---No New Cell hiiii");

        // Setting Tag To UIButton
        _checkButton = (UIButton *)[cell.contentView viewWithTag:indexPath.row];
        _cancelButton = (UIButton *)[cell.contentView viewWithTag:indexPath.row];
    }
    // Creating Label Menu Name
    _nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(8, 11, 82, 21)];
    _nameLabel.backgroundColor = [UIColor clearColor];
    _nameLabel.text =  [_hotel._orderedMenus objectAtIndex:indexPath.row];

    // Creating Label Menu Cost
    _amountMenu   = [[UILabel alloc] initWithFrame:CGRectMake(167, 13, 44, 21)];
    _amountMenu.backgroundColor = [UIColor clearColor];
    _amountMenu.text  = [[_hotel._menuPrices objectAtIndex:indexPath.row] stringValue];

    // Creating Text Field For Order Quantity
    _textFieldQuantity = [[UITextField alloc] initWithFrame:CGRectMake(125,14,42,21)];
    _textFieldQuantity.userInteractionEnabled = NO;
    _textFieldQuantity.text = [[_hotel._selectedQuantity objectAtIndex:indexPath.row] stringValue];

    // Creating Button For Check Order
    _checkButton  = [UIButton buttonWithType:UIButtonTypeCustom];
    [_checkButton setFrame:CGRectMake(232, 13, 25, 28)];
    [_checkButton setTag:indexPath.row];
    _checkButton.titleLabel.tag = indexPath.row;
    [_checkButton setBackgroundImage:[UIImage imageNamed:@"edit.png"]forState:UIControlStateNormal];
    [_checkButton addTarget:self action:@selector(editQuantity:) forControlEvents:UIControlEventTouchUpInside];


    // Creating Button For CANCEL Order
    _cancelButton  = [UIButton buttonWithType:UIButtonTypeCustom];
    [_cancelButton setFrame:CGRectMake(265, 13, 25, 28)];
    [_cancelButton setBackgroundImage:[UIImage imageNamed:@"cancel.png"] forState:UIControlStateNormal];
    [_cancelButton setTag:indexPath.row];
    _cancelButton.titleLabel.tag = indexPath.row;
    [_cancelButton addTarget:self  action:@selector(cancelOreder:) forControlEvents:UIControlEventTouchUpInside];

    // Adding All To Content View
    [cell.contentView addSubview:_nameLabel];
    [cell.contentView addSubview:_amountMenu];
    [cell.contentView addSubview:_textFieldQuantity];
    [cell.contentView addSubview:_checkButton];
    [cell.contentView addSubview:_cancelButton];


    //objc_setAssociatedObject(_checkButton, iindex, indexPath,OBJC_ASSOCIATION_RETAIN );

    return cell;
  }


-(void)editQuantity:(id)sender{

    button = (UIButton *)sender;
    row = button.tag;
    col = button.titleLabel.tag;
    NSLog(@"Check Button index is %d",row);
    NSLog(@"cehck title is %d",col);
    _textFieldQuantity.userInteractionEnabled = YES;
    UIImage *buttonImage = [UIImage imageNamed:@"edit_over.png"];
    [_checkButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
    UIImage *buttonImageCancel = [UIImage imageNamed:@"check.png"];
    [_cancelButton setBackgroundImage:buttonImageCancel forState:UIControlStateNormal];
    _cancelButton.tag =  0;

} 

-(void)cancelOreder:(id)sender{

    button = (UIButton *)sender;
    row = button.tag;
    NSLog(@"The Row Selected iS At Cancel Order ISSSS----%d", row);
    if (_cancelButton.tag ==  0){
        _textFieldQuantity.userInteractionEnabled = NO;
        UIImage *buttonImageCancel = [UIImage imageNamed:@"check_over.png"];
        [_cancelButton setBackgroundImage:buttonImageCancel  forState:UIControlStateNormal];
        UIImage *buttonImageCancel1 = [UIImage imageNamed:@"cancel.png"];
        [_cancelButton setBackgroundImage:buttonImageCancel1 forState:UIControlStateNormal];
        UIImage *buttonImage = [UIImage imageNamed:@"edit.png"];
        [_checkButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
        _cancelButton.tag = 1;
    }
    else
    {
        UIAlertView *alert =  [[UIAlertView alloc] initWithTitle:@"iHomeDelivery" message:@"Do You Want To Cancel the Order" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }

}

Answer 1

问题是，任何控件的默认标记值都设置为0，并且您已使用_cancelButton.tag = 0;。只需将值更改为10，然后_cancelButton.tag = 1;将1更改为11。

这将解决您的问题：）

Answer 2

我看到_checkButton，_nameLabel，_ amountMenu，_textFieldQuantity＆amp; _cancelButton都是视图控制器类的实例变量。

在cellForRowAtIndexPath中：当您为所有这些对象分配新对象时，它们将引用显示的最后一个单元格的对象。意味着所有这些将指向来自最后一个单元的组件。因此改变_checkButton＆amp;的背景图像。 _cancelButton将影响最后一个单元格中的按钮。

同样在cellForRowAtIndexPath中：在创建这些按钮时，您正在为它们设置背景图像，因此在滚动按钮后图像会发生变化。记住cellForRowAtIndexPath：每次在滚动时隐藏后该行变为可见时都会调用一行。

您需要在单独的数组中维护按钮的状态，以便在出列后可以重置cellForRowAtIndexPath中按钮的状态。

表视图按钮索引单元格

2 个答案: