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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)
学习是最好的投资！
Check if selecteRange is correct
Use textView.attributedText, not textView.text
After modification, you need to reassign textview
+1 from upstairs, use textView.attributedText, not textView.text
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Check if selecteRange is correct
Use textView.attributedText, not textView.text
After modification, you need to reassign textview
+1 from upstairs, use textView.attributedText, not textView.text