Get the height of keyboard doesn't work on IOS 11 beta

Use UIKeyboardFrameEndUserInfoKey instead of UIKeyboardFrameBeginUserInfoKey

So changing your code to the following will fix your issue:

if let userInfo = notification.userInfo {    if let keyboardSize = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {        print(keyboardSize)    }}

I have the same issue. The answer of Doug Amos is right. I just want to make it clearer. Here is my code:

@objc func keyboardWillShow(notification:NSNotification){        var userInfo = notification.userInfo!        var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue        if keyboardFrame.size.height <= 0 { // to fix bug on iOS 11            keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue        }        keyboardFrame = self.view.convert(keyboardFrame, from: nil)    }

I used this code in my app with Swif 3+

    var userInfo = notification.userInfo    if let keyboardFrame = (userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue{        print(keyboardFrame.height)        if keyboardFrame.size.height <= 0 { // To fix bug on iOS 11            if let newKeyboardFrame = (userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue{                print(newKeyboardFrame.height)            }        }    }    view.layoutIfNeeded()