Crash on UITextField Focus (Swift 3)

[m-butler]

func keyboardDidShow(_ notification: Notification) {
        let info = (notification as NSNotification).userInfo
        let keyboardSize = ((info![UIKeyboardFrameBeginUserInfoKey] as AnyObject).cgRectValue.size)
        self.oldFrame = self.alertView.frame
        let extraHeight = (oldFrame.size.height + oldFrame.origin.y) - (self.view.frame.size.height - keyboardSize.height)
        if extraHeight > 0 {
            UIView.animate(withDuration: 0.3, animations: { () -> Void in
                self.alertView.frame = CGRect(x: self.oldFrame.origin.x, y: self.oldFrame.origin.y - extraHeight - 8, width: self.oldFrame.size.width, height: self.oldFrame.size.height)
            })
        }
    }

When focusing on a UITextField inside of a ZAlertView, the application crashes on this line:

let keyboardSize = ((info![UIKeyboardFrameBeginUserInfoKey] as AnyObject).cgRectValue.size)

The error reported is:

fatal error: unexpectedly found nil while unwrapping an Optional value

[Dileepyadav]

facing the same issue

[zelic91]

Thanks for reporting. Please checkout version 0.3.3.