UITableViewCell不显示subViews

Question

我使用下面的代码显示自定义UITableViewCell。然而，问题在于它只显示了backImage，而没有显示任何其他标签或图像。

这是密码和ss。

怎么了？

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIImageView *maleIcon;
    UIImageView *femaleIcon;
    UIImageView *backImage;

    UILabel *name;
    UILabel *address;
    UILabel *maleCount;
    UILabel *femaleCount;

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyIdentifier"];

    VenueClass *venue = [self.venueArray objectAtIndex:[indexPath row]];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"MyIdentifier"];
        backImage =  [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];

        maleIcon   =  [[UIImageView alloc] initWithFrame:CGRectMake(234,143,25,25)];
        femaleIcon =  [[UIImageView alloc] initWithFrame:CGRectMake(234,173,25,25)];

        maleIcon.image    =   [UIImage imageNamed:@"rectangle.png"];
        femaleIcon.image  =   [UIImage imageNamed:@"rectangle.png"];

        name        = [[UILabel alloc] initWithFrame:CGRectMake(10,148,140,22)];
        address     = [[UILabel alloc] initWithFrame:CGRectMake(10,178,140,22)];
        maleCount   = [[UILabel alloc] initWithFrame:CGRectMake(266,145,48,22)];
        femaleCount = [[UILabel alloc] initWithFrame:CGRectMake(266,175,48,22)];

        name.font        = [UIFont boldSystemFontOfSize:16];
        address.font     = [UIFont systemFontOfSize:14];
        maleCount.font   = [UIFont boldSystemFontOfSize:14];
        femaleCount.font = [UIFont boldSystemFontOfSize:14];

        name.backgroundColor        = [UIColor clearColor];
        address.backgroundColor     = [UIColor clearColor];
        maleCount.backgroundColor   = [UIColor clearColor];
        femaleCount.backgroundColor = [UIColor clearColor];

        name.textColor        = [UIColor whiteColor];
        address.textColor     = [UIColor whiteColor];
        maleCount.textColor   = [UIColor whiteColor];
        femaleCount.textColor = [UIColor whiteColor];

        [cell.contentView addSubview:backImage];
        [cell.contentView addSubview:name];
        [cell.contentView addSubview:address];
        [cell.contentView addSubview:maleCount];
        [cell.contentView addSubview:femaleCount];
        [cell.contentView addSubview:femaleIcon];
        [cell.contentView addSubview:maleIcon];

    }

    CLLocation *location = [[CLLocation alloc] initWithLatitude:[venue.latitude doubleValue] longitude:[venue.longitude doubleValue]];

    AppDelegate *appDelegate = (AppDelegate *) [[UIApplication sharedApplication] delegate];
    int distance = [location distanceFromLocation:appDelegate.myLocationCtrl.locationManager.location];
    distance = distance / 1000;

    [femaleCount setText:venue.femaleCount];
    [maleCount   setText:venue.maleCount];
    [name        setText:venue.name];
    [address     setText:[NSString stringWithFormat:@"%@/%d Km", venue.address, distance]];

    cell.accessoryType = UITableViewCellAccessoryNone;
    cell.backgroundColor = [UIColor clearColor];


    NSString *path = [[NSString stringWithFormat:@"%@%@" ,IMAGE_URL, venue.imagePath ] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    [backImage setImageWithURL:[NSURL URLWithString:path] placeholderImage:[UIImage imageNamed:@""]
                  completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType)
     {         
     }];

    return cell;
}

​

​

Answer 1

是的，你的背影太宽太高了，你把它设为320x100，试试60x100

对不起编辑:您的其他项目是关闭屏幕/单元格，因为它们是Y坐标>100。Tr将第二个参数简化为initWithFrame:CGRectMake(X，Y必须小于单元格高度、宽度、高度)

Answer 2

您以前在代码中为标识符MyIdentifier注册了类吗？

如果是这样的话，那么cell永远不会为零，因为dequeueReusableCellWithIdentifier:方法总是返回一个单元格。从医生那里：

如果您为指定的标识符注册了一个类，并且必须创建一个新的单元格，则此方法通过调用该单元格的initWithStyle:重用标识符:方法来初始化该单元格。对于基于nib的单元格，此方法从提供的nib文件加载单元格对象。如果现有单元可以重用，则此方法将调用单元的prepareForReuse方法。

这意味着您的代码将永远不会运行您在if(cell == nil){}语句中执行的设置

如果您没有为该重用标识符注册一个Class或Nib，则应用程序应该会崩溃，因此我怀疑您在应用程序中看到的是您注册的默认的nib或类。

一种常见的方法是在自定义UITableViewCell类或nib中配置所有这些子标签和imageView，然后在这个tableView:cellForRowAtIndexPath:方法中为这些属性分配相关的值。