'_ ??' 无法使用NSMutableAttributedString转换为'（）'

Question

I've to say that i'm pretty new to Swift and i'm stuck in setting a NSMutableAttributedString in a UILabel .

var attributedString = NSMutableAttributedString("random string for this example")
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(1, 3))
tweetTextLabel?.text = attributedString

The last line gives to me: '_ ??' is not convertible to '()' '_ ??' is not convertible to '()' so I can't even compile.

I tried also with:

tweetTextLabel?.text = attributedString.string

but in this way I lose the color attribute

Answer 1

您应该设置为UILabel的attributedText属性，例如：

tweetTextLabel?.attributedText = attributedString