ios - addAttribute不起作用

Question

我想用这段代码将我选中的textview中的内容更改一个字体，但是没有起作用。大神们知道为什么么？

let string = NSMutableAttributedString(string: bodyView.inputBodyTV.text)
string.addAttribute(NSFontAttributeName, value: UIFont.boldSystemFontOfSize(15), range: selecteRange)

Answer 1

1. Check if selecteRange is correct

2. Use textView.attributedText, not textView.text

3. After modification, you need to reassign textview

Answer 2

+1 from upstairs, use textView.attributedText, not textView.text