如何在单击该单元格中的按钮时更改自定义单元格中的标签文本

Question

我已创建带有标签和按钮的自定义tableView。点击一个单元格的按钮时，我只想更改该单元格中的标签文本。我的问题是当我点击按钮相应的标签在其他单元格也发生了变化。这里是我的代码

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

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





     UILabel *labelOne = [[UILabel alloc]initWithFrame:CGRectMake(70, 10, 100, 20)]; 
     labelOne.tag = 100; 
     labelOne.backgroundColor=[UIColor clearColor]; 
     labelOne.font=[UIFont systemFontOfSize:14]; 
     [cell.contentView addSubview:labelOne]; 
     [labelOne release]; 

     UIButton *minusbutton=[[UIButton alloc]initWithFrame:CGRectMake(152, 5, 15, 20)]; 

     minusbutton.backgroundColor=[UIColor clearColor]; 
     [minusbutton addTarget:self action:@selector(DecreaseTickets:) forControlEvents:UIControlEventTouchUpInside]; 
     [minusbutton setTitle:@"-" forState:UIControlStateNormal]; 
     [minusbutton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
     [minusbutton setBackgroundImage:[UIImage imageNamed:@"button-green1.png"] forState:UIControlStateNormal]; 
     [cell.contentView addSubview:minusbutton]; 
     [minusbutton release]; 


     UILabel *quantity = [[UILabel alloc]initWithFrame:CGRectMake(170, 5, 20, 20)]; 
     quantity.tag = 103; 
     quantity.backgroundColor=[UIColor clearColor]; 
     quantity.font=[UIFont systemFontOfSize:12]; 
     [cell.contentView addSubview:quantity]; 
     [quantity release]; 

     UIButton *addbutton=[[UIButton alloc]initWithFrame:CGRectMake(192, 5, 15, 20)]; 

     addbutton.backgroundColor=[UIColor clearColor]; 
     [addbutton addTarget:self action:@selector(IncreaseTickets:) forControlEvents:UIControlEventTouchUpInside]; 
     [addbutton setTitle:@"+" forState:UIControlStateNormal]; 
     [addbutton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
     [addbutton setBackgroundImage:[UIImage imageNamed:@"button-green1.png"] forState:UIControlStateNormal]; 
     [cell.contentView addSubview:addbutton]; 
     [addbutton release]; 


     UILabel *labelTwo = [[UILabel alloc]initWithFrame:CGRectMake(260, 10, 140, 20)]; 
     labelTwo.tag = 101; 
     labelTwo.backgroundColor=[UIColor clearColor]; 
     labelTwo.font=[UIFont systemFontOfSize:14]; 
     labelTwo.textColor=[UIColor colorWithRed:0.25098 green:0.447059 blue:0.07451 alpha:1]; 
     [cell.contentView addSubview:labelTwo]; 
     [labelTwo release]; 


     UILabel *label3 = [[UILabel alloc]initWithFrame:CGRectMake(70, 30, 230, 30)]; 
     label3.tag = 102; 
     label3.backgroundColor=[UIColor clearColor]; 
     label3.numberOfLines=2; 
     label3.font=[UIFont systemFontOfSize:12]; 
     [cell.contentView addSubview:label3]; 
     [label3 release]; 


} 


    UILabel *labelOne = (UILabel *) [cell.contentView viewWithTag:100]; 
    NSString *ss2=[[NSString alloc]initWithFormat:@"%@",[[eventTicketListArray objectAtIndex:indexPath.row ]tit] ]; 

    labelOne.text = ss2;  

    UILabel *labelTwo = (UILabel *) [cell.contentView viewWithTag:101]; 
    labelTwo.text = [[NSString alloc]initWithFormat:@"%@",[[eventTicketListArray objectAtIndex:indexPath.row ]price] ]; 

    UILabel *label3 = (UILabel *) [cell.contentView viewWithTag:102]; 
    label3.text=[[NSString alloc]initWithFormat:@"%@",[[eventTicketListArray objectAtIndex:indexPath.row ]desc ] ]; 

    UILabel *label4 = (UILabel *) [cell.contentView viewWithTag:103]; 
    label4.text=[[NSString alloc]initWithFormat:@"%d",qty]; 
} 


return cell; 

}

Initially qty=0 

现在我想，当我点击Add按钮，那细胞数量的增加。这里是我的按钮单击事件

-(void)IncreaseTickets:(id)sender{ 

NSIndexPath *indexPath =[ticketTable indexPathForCell:(UITableViewCell *)[[sender superview] superview]]; 

//NSUInteger row = indexPath.row; 
    UITableViewCell *currentCell = (UITableViewCell *)[[sender superview] superview] ; 

UILabel *label4 = (UILabel *) [currentCell.contentView viewWithTag:103]; 
label4.text=[[[NSString alloc]initWithFormat:@"%d",qty++] ; 

//NSLog(@"%d",row); 

[ticketTable reloadData]; 

}

但问题是，当我按一下按钮，所有的细胞数量的增加。请指导我如何去做。任何帮助将不胜感激。

Answer 1

，当你调用

[ticketTable reloadData]; 

所有数据重新加载，你的表是再次

UITable神奇的是在几个分配的小区（只需要细胞的微小按蚊数量的重用初始化：可视细胞在屏幕上的时间），然后你应该重新使用新的数据设置当你滚动，通常使用NSArray在你的表数据代表...

and：where qty is defined？现在看来，这是一个全局变量，而不是一个对每一个细胞......

你最好阅读一些苹果示例代码或一些教程

Answer 2

规定的条件这样的..在全局变量NSUInteger myRow 集。

myRow = indexPath.row;//Set Selected index path. 

in cellForRowAtIndexPath set condition。

if(myRow == indexPath.row) 
{ 
    NSUInteger newqty = qty + 1; 
    UILabel *label4 = (UILabel *) [cell.contentView viewWithTag:103]; 
    label4.text=[[NSString alloc]initWithFormat:@"%d",newqty]; 
} 
esle 
{ 
    UILabel *label4 = (UILabel *) [cell.contentView viewWithTag:103]; 
    label4.text=[[NSString alloc]initWithFormat:@"%d",qty]; 
    } 

并为此设置了一些逻辑。