ios - 具有动态高度的 UILabel 到 UITableviewcell

Question

我正在开发一个需要将 UILabel 显示到 UITableviewCell 中的应用程序。我还需要根据文本大小调整 UILabel 的大小。我正在使用以下代码获取文本大小的 contentsize。

CGRect rect = [as boundingRectWithSize:CGSizeMake(220.0, 2000.0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: font} context:nil];

对于 UILabel 的更新框架，我使用以下代码。

 rect.origin.x = cell.lblDescription.frame.origin.x;
 rect.origin.y = cell.lblDescription.frame.origin.y;
 rect.size.width = cell.lblDescription.frame.size.width;

 [cell.lblDescription setFrame:rect];

它设置了错误的框架。请查找随附的屏幕截图。

Answer 1

    NSString *text = [NSString stringWithFormat:@"%@",[[arr_cart objectAtIndex:indexPath.row] objectForKey:@"name"]];
    UIFont *font = [UIFont fontWithName:@"ArialMT" size:12];
    CGSize size = [(text ? text : @"") sizeWithFont:font constrainedToSize:CGSizeMake(200, 9999) lineBreakMode:NSLineBreakByWordWrapping];
    UILabel *lbl_desc=[[UILabel alloc]init];
    lbl_desc.numberOfLines = 0;
    lbl_desc.frame=CGRectMake(70,18, size.width, size.height);
    lbl_desc.lineBreakMode = NSLineBreakByWordWrapping;
    lbl_desc.text = (text ? text : @"");
    lbl_desc.font = font;
    lbl_desc.backgroundColor=[UIColor clearColor];
    lbl_desc.textColor = [UIColor darkTextColor];
    [cell.contentView addSubview:lbl_desc];
    [lbl_desc release];