不能使用Swift 4 CGRect高度

我正在使用swift 4&出现以下错误：

实例成员“height”不能用于类型“CGRect”

使用以下代码时：

 let userInfo = notification.userInfo!

let keyboardFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue

let keyboardFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue

let changeInHeight = (CGRect.height(keyboardFrame) + 40) * (show ? 1 : -1)

---

我不明白为什么，非常感谢任何帮助

height

是

CGRect

结构的一个属性。您正在访问它，就像它是一个类方法一样。由于

keyboardFrame

的类型为

CGRect

，因此您需要

keyboardFrame.height

let changeInHeight = (keyboardFrame.height + 40) * (show ? 1 : -1)

 var userInfo = notification.userInfo!

        let keyboardFrame:CGRect = (userInfo[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue

        let animationDurarion = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as! TimeInterval

        let changeInHeight = (keyboardFrame.height + 40) * (show ? 1 : -1)
        UIView.animate(withDuration: animationDurarion, animations: { () -> Void in
          self.bottomConstraint.constant += changeInHeight
        })