[Flutter] App is not opening on click of Accept call (Background or Terminated state app)

I used this plugin flutter_callkit_incoming for configuring notification call notification in android and ios. Android is working fine. IOS i received notification very well. The only problem i am facing is when i accept the call it is not opening app automatically in IOS. When i open app manually it starts call. But ideally it should launch app on click of accept call.

Note: I added checkAndNavigationCallingPage() in WidgetsBinding.instance.addPostFrameCallback

I am sure i missed upon some configuration param. I am using latest lib. Below is my code from AppDelegate.swift

Please help me on resolving this issue.

import UIKit
import Flutter
import flutter_local_notifications
import flutter_callkit_incoming
import CallKit
import AVFAudio
import PushKit

@main
@objc class AppDelegate: FlutterAppDelegate, PKPushRegistryDelegate {
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
// This is required to make any communication available in the action isolate.
FlutterLocalNotificationsPlugin.setPluginRegistrantCallback { (registry) in
GeneratedPluginRegistrant.register(with: registry)
}

// Added as per documentation of flutter local notification package
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
}

GeneratedPluginRegistrant.register(with: self)


//Setup VOIP (flutter_callkit_incomming)
let mainQueue = DispatchQueue.main
let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)
voipRegistry.delegate = self
voipRegistry.desiredPushTypes = [PKPushType.voIP]

return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}

// As per flutter_callkit_incomming Start ///////////////////


// Handle updated push credentials
func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, for type: PKPushType) {
print(credentials.token)
let deviceToken = credentials.token.map { String(format: "%02x", $0) }.joined()
print(deviceToken)
//Save deviceToken to your server
SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken)
}

func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
print("didInvalidatePushTokenFor")
SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP("")
}

// Handle incoming pushes
func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) {
print("didReceiveIncomingPushWith")
guard type == .voIP else { return }

// Require by
let id = payload.dictionaryPayload["id"] as? String ?? UUID().uuidString
let nameCaller = (payload.dictionaryPayload["params"] as? [String: Any])? ["body"] as? String ?? ""
let appName = (payload.dictionaryPayload["params"] as? [String: Any])? ["title"] as? String ?? ""
// Phone number/Email/Any
let handle = payload.dictionaryPayload["handle"] as? String ?? "generic"
//Video call or audio call
let isVideo = payload.dictionaryPayload["isVideo"] as? Int ?? 1
//duration of ring
let duration = payload.dictionaryPayload["duration"] as? Int ?? 30000
// ringtone
let ringtonePath = payload.dictionaryPayload["ringtonePath"] as? String ?? "system_ringtone_default"
var args: NSDictionary = ["id": id, "nameCaller": nameCaller, "appName": appName, "handle": handle, "type": isVideo, "duration": duration, "ringtonePath": ringtonePath]
let data = flutter_callkit_incoming.Data(args: args)
data.extra = payload.dictionaryPayload["params"] as? NSDictionary ?? [:]
data.iconName = ""
data.type = 1;
print(data);
SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(data, fromPushKit: true)

//Make sure call completion()
DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
completion()
}
}

///// as per flutter_callkit_incomming END //////
}



Below is git link:

https://github.com/hiennguyen92/flutter_callkit_incoming/issues/605

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