Argthtjtr

Sorry if any similar question(s) has been answered. But, I just can't seem to figure this one out.

I have reached my goal, to bind the "Log In" button to the keyboard, basically pushing it from the bottom of the screen to the top of the keyboard using an extension below.

picture: Initial view without keyboard.

picture: keyboard has been launched.

My UIView extension:

import UIKit



 extension UIView{

 func bindToKeyboard(){

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(_:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)

}





@objc func keyboardWillChange(_ notification: NSNotification){

    let duration = notification.userInfo![UIResponder.keyboardAnimationDurationUserInfoKey] as! Double

    let curve = notification.userInfo![UIResponder.keyboardAnimationCurveUserInfoKey] as! UInt

    let beginningFrame = (notification.userInfo![UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue

    let endFrame = (notification.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue

    let deltaY = endFrame.origin.y - beginningFrame.origin.y



    UIView.animateKeyframes(withDuration: duration, delay: 0.0, options: UIView.KeyframeAnimationOptions(rawValue: curve), animations: {

        self.frame.origin.y += deltaY

    }, completion: nil)

   }

}

and I called bindToKeyboard() to loginBtn in the viewDidLoad() of my LoginVC like so:

loginBtn.bindToKeyboard()

The problem here is, after the first tap to the textfield (either email or password field), the button disappears. After the keyboard is closed, the button is actually back to its initial position just like in the first picture. Then calling the keyboard again by tapping one of those textfields, the button works properly. But the second and so forth tap, it does not.

The point of my question:

1. how can I implement the extension to be able to work properly with multiple textfields/textviews?


2. If that's not possible, how should I approach this problem?

I am sorry if my explanation and or English is unclear.

Thank you so much.

How about try to implement same login button with keyboard inputAccessoryView?
Then when keyboard shows up, the original login button will hidden by keyboard, but user will see another one on the top of keyboard.