Question

我有一个tableView，它包含已解析的数据。如果我点击我的表格视图单元格。表格视图中的文本标签被重叠，它上面显示一个黑色的黑点。下面是屏幕截图和代码

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


static NSString *CellIdentifier = @"Cell";

 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
   if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle      reuseIdentifier:CellIdentifier] autorelease];

 }
NSDictionary *boy=[self.media1 objectAtIndex:indexPath.row];
NSString *str=[[NSString alloc]initWithFormat:@"%@",boy];
NSInteger n=[str intValue];
NSLog(@"the value:%@",str);
if(n ==0)
{   
CGRect starFrame = CGRectMake(217,6, 85, 40);

UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
starImage.image = [UIImage imageNamed:@"nostar.png"];
starImage.backgroundColor=[UIColor clearColor];
[cell.contentView addSubview:starImage];

NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
CGRect labelFrame = CGRectMake(203,18, 20, 20);
UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
Label.text=boo;
[cell.contentView addSubview:Label];


  }
 if(n >=1)
 {   
   CGRect starFrame = CGRectMake(217,6, 85, 40);

  UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
   starImage.image = [UIImage imageNamed:@"1star.png"];
  [cell.contentView addSubview:starImage];

   NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
   CGRect labelFrame = CGRectMake(203,18, 20, 20);
   UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
   Label.text=boo;
    [cell.contentView addSubview:Label];

    }

if(n >=2)
{   
CGRect starFrame = CGRectMake(217,6, 85, 40);

UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
starImage.image = [UIImage imageNamed:@"twostar.png"];
[cell.contentView addSubview:starImage];

NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
CGRect labelFrame = CGRectMake(203,18, 20,20);
UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
Label.text=boo;
[cell.contentView addSubview:Label];

 }
if(n >=3)
{   
CGRect starFrame = CGRectMake(217,6, 85, 40);

UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
starImage.image = [UIImage imageNamed:@"threestar.png"];
[cell.contentView addSubview:starImage];

NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
CGRect labelFrame = CGRectMake(203,18, 20,20);
UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
Label.text=boo;
[cell.contentView addSubview:Label];

 }

 if(n >= 4)
 {
CGRect starFrame = CGRectMake(217,6, 85, 40);

UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
starImage.image = [UIImage imageNamed:@"4star.png"];
[cell.contentView addSubview:starImage];

NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
CGRect labelFrame = CGRectMake(203,18,20,20);
UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
Label.text=boo;
[cell.contentView addSubview:Label];
}
  if(n >= 5)
  {
CGRect starFrame = CGRectMake(217,6, 85, 40);

UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
starImage.image = [UIImage imageNamed:@"5star.png"];
[cell.contentView addSubview:starImage];

NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
CGRect labelFrame = CGRectMake(203,18, 20,20);
UILabel *Label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
Label.text=boo;

[cell.contentView addSubview:Label];
}


  cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
  cell.textLabel.text=[self.story objectAtIndex:indexPath.row];
  cell.textLabel.numberOfLines=2;

  return cell;
  }

   - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath    *)indexPath {

 title=[self.story objectAtIndex:indexPath.row];
NSDictionary *detaildesc1=[self.descriptiondesc objectAtIndex:indexPath.row];
FirstViewDetailDetail *detailViewController1 = [[FirstViewDetailDetail alloc]     initWithItem:detaildesc1 Title:title];    
    [self.navigationController pushViewController:detailViewController1 animated:YES];
   [detailViewController1 release];

   }

enter image description here

Answer 1

您的问题是每次显示单元格时都会添加新标签和图像视图当你必须创建一个新的单元格时，你应该这样做一次，因为你没有从未使用的单元格队列中获取一个单元格。

“黑点”是两对UILabel。向上和向下滚动表格以查看相同的内容。

将您的UI *分配移动到if (cell == nil)并在if语句之外配置它们。

像这样：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        // create a new cell
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
        // create views here and add them to the cell. 
        CGRect starFrame = CGRectMake(217,6, 85, 40);
        UIImageView *starImage = [[[UIImageView alloc] initWithFrame:starFrame] autorelease];
        // use tags to get the views later.
        starImage.tag = 1021;
        starImage.image = [UIImage imageNamed:@"nostar.png"];
        starImage.backgroundColor=[UIColor clearColor];
        [cell.contentView addSubview:starImage];

        CGRect labelFrame = CGRectMake(203,18, 20, 20);
        UILabel *label = [[[UILabel alloc] initWithFrame:labelFrame] autorelease];
        label.tag = 1022;
        [cell.contentView addSubview:label];

        // do all cell configuration here that is the same for all cells in your table
        cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
        cell.textLabel.numberOfLines=2;
    }
    // whatever happened before you have a valid cell at this point

    // get the imageView and label you added before
    UIImageView *starImageView = [cell.contentView viewWithTag:1021];
    UILabel *label = [cell.contentView viewWithTag:1022];

    NSDictionary *boy=[self.media1 objectAtIndex:indexPath.row];
    NSString *str=[[NSString alloc]initWithFormat:@"%@",boy];
    NSInteger n=[str intValue];
    UIImage *image = nil;
    switch (n) {
        case 0: 
            image = [UIImage imageNamed:@"nostar.png"];
            break;
        case 1: 
            image = [UIImage imageNamed:@"1star.png"];
            break;
        case 2: 
            image = [UIImage imageNamed:@"twostar.png"];
            break;
        case 3: /* more code here */
        case 4: /* here */
        case 5: /* and here */
    }
    starImageView.image = image;
    NSString *boo=[[NSString alloc]initWithFormat:@"%d",n];
    label.text = boo;

    cell.textLabel.text=[self.story objectAtIndex:indexPath.row];
    return cell;
}

tableview单元格点击数据重叠

1 个答案: