get a notification from notificationCenter after returning from a phone call

Question

I want to do an action after the user tapped on the call button and made a call then returned to the app.

This is my function for making a phone call :

Answer 1

You can use CXCallObserver to listen the call events as below,

import CallKit

class ViewController: UIViewController, CXCallObserverDelegate {

    let co = CXCallObserver()

    override func viewDidLoad() {
        super.viewDidLoad()

        co.setDelegate(self, queue: DispatchQueue.main)
    }

    func callObserver(_ callObserver: CXCallObserver, callChanged call: CXCall) {
        if call.hasEnded {
            print("Call is ended")
        }
        if call.hasEnded == false && call.hasConnected {
            print("Call is connected")
        }
        if call.isOutgoing {
            print("This is an outgoing call")
        } else if call.hasEnded == false && call.hasConnected == false {
            print("This is an incoming call")
        }
    }
}