Swift中基于标签文本长度的动态自定义UITableViewCell的高度

Question

我一直在尝试使用 swift 制作一个带有标签的动态单元格，以支持 heightForRowAtIndexPath 中的 IOS7，但我只找到了 Objective-c 代码，其他人是否可以帮助我将这段代码重写为 swift ？

 // Fetch yourText for this row from your data source..
    NSString *yourText = [yourArray objectAtIndex:indexPath.row];

    CGSize lableWidth = CGSizeMake(300, CGFLOAT_MAX); // 300 is fixed width of label. You can change this value
    CGSize requiredSize = [yourText sizeWithFont:[UIFont fontWithName:@"Times New Roman" size:19] constrainedToSize:lableWidth lineBreakMode:NSLineBreakByWordWrapping]; // You can put your desire font

    // Here, you will have to use this requiredSize and based on that, adjust height of your cell. I have added 10 on total required height of label and it will have 5 pixels of padding on top and bottom. You can change this too.
    int calculatedHeight = requiredSize.height+10;
    return (float)calculatedHeight;

正是这个语句（如何将其转换为 swift）：

CGSize requiredSize = [yourText sizeWithFont:[UIFont fontWithName:@"Times New Roman" size:19] constrainedToSize:lableWidth lineBreakMode:NSLineBreakByWordWrapping]

我尝试将其转换为（但它不能像原来的 Objective-c 那样工作）：

 var requiredSize: CGSize = originalString.sizeWithAttributes([NSFontAttributeName: UIFont.systemFontOfSize(19.0)])

Answer 1

也许没有UILabel 也可以这样做，但这很好用。

let label = UILabel(frame: CGRect(x: 0, y: 0, width: 300, height: 10000))
label.text = someText
label.numberOfLines = 100
label.font = UIFont(name: "Times New Roman", size: 19.0)
label.sizeToFit()
return label.frame.height + 10