在UITableView中放置标签时遇到问题 [英] Trouble with putting label in UITableView

问题描述

我使用此代码显示2段的 UITableView

I use this code to display UITableView with 2 segment

if(segment.selectedSegmentIndex==0)
    {

        firstSeg=[firsArray objectAtIndex:indexPath.row];

        NSString * celldata = [NSString stringWithFormat:@"%@  %@  %@",firstSeg.a,firstSeg.b,firstSeg.c];

        lbl =[[UILabel alloc]initWithFrame:CGRectMake(10, 10, 300, 20) ];

        lbl.text=celldata;
        [cell.contentView addSubview:lbl];   
    }
    else if(segment.selectedSegmentIndex==1) {

        seconSeg=[secondArray objectAtIndex:indexPath.row];

        NSString * celldata = [NSString stringWithFormat:@"%@  %@  %@",secondSeg.a,secondSeg.b,secondSeg.c];

        lbl2 =[[UILabel alloc]initWithFrame:CGRectMake(10, 10, 300, 20) ];

        lbl2.text=celldata;
        [cell.contentView addSubview:lbl2];
        }


    return cell;

我的 tableView 和我的段工作正常，但是当我在第二段中选择一行时，第一个标签 lbl 和 lbl2 出现一起.我尝试在第二部分中使 lbl = nil ， lbl = NULL 无效，但是请您帮我吗?

My tableView and my segment work fine , but when I select a row in the second segment, the first label lbl and lbl2 appear together. I tried, in the second segment, to make lbl=nil, lbl=NULL but it don't work, can you help me please?

与此cell.textLabel.text = celldata;效果很好，但是文本太大，我不能修改大小吗?

with this cell.textLabel.text =celldata; it woek perfectly but the text is too large, i can't modifie the size ?

推荐答案

问题在于，每次重新加载tableview单元格时，您都将标签添加到单元格中

The problem is that you are adding the label to the cell every time you reload the tableview cells

尝试仅添加标签一次，并为此标签指定标签

Try adding the label only once and specify a tag for this label

在文件顶部添加:

#define CELL_LABEL_TAG 333

在创建单元格时，还要创建标签并将其添加为子视图

when you create the cell, create also the label and add it as a subview

UILabel *lbl =[[UILabel alloc]initWithFrame:CGRectMake(10, 10, 300, 20) ];
[lbl setTag:CELL_LABEL_TAG];
[cell.contentView addSubview:lbl];

将您的代码更改为:

if(segment.selectedSegmentIndex==0) {

    firstSeg=[firsArray objectAtIndex:indexPath.row];

    NSString * celldata = [NSString stringWithFormat:@"%@  %@  %@",firstSeg.a,firstSeg.b,firstSeg.c];

    lbl =(UILabel *)[cell.contentView viewWithTag:CELL_LABEL_TAG];

    lbl.text=celldata;
}
else if(segment.selectedSegmentIndex==1) {

    seconSeg=[secondArray objectAtIndex:indexPath.row];

    NSString * celldata = [NSString stringWithFormat:@"%@  %@  %@",secondSeg.a,secondSeg.b,secondSeg.c];

    lbl2 =(UILabel *)[cell.contentView viewWithTag:CELL_LABEL_TAG];

    lbl2.text=celldata;
    }


return cell;

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