Perform segue after notification access has been granted - swift

Question

I would like to know how to perform a modal segue after the remote notification access has been granted from the dialog box. I have set up my remote notification in the app delegate.
func registerANSForApplication(_ application: UIApplication,withBlock block: #escaping (_ granted:Bool) -> (Void)){
InstanceID.instanceID().instanceID { (result, error) in
if let error = error {
print("Error fetching remote instange ID: \(error)")
} else if let result = result {
print("Remote instance ID token: \(result.token)")
AppDelegate.isToken = result.token
}
}
let current = UNUserNotificationCenter.current()
let options : UNAuthorizationOptions = [.sound, .badge, .alert]
current.requestAuthorization(options: options) { (granted, error) in
guard granted else{
return
}
if error != nil{
print(error?.localizedDescription ?? "")
}else{
Messaging.messaging().delegate = self
current.delegate = self
DispatchQueue.main.async {
application.registerForRemoteNotifications()
}
}
}
}
Then, in my view controller, I have this code:
let appDelegate = UIApplication.shared.delegate as!
appDelegate.registerANSForApplication(UIApplication.shared) { (granted) -> (Void) in
self.performSegue(withIdentifier: "MembershipVC", sender: nil)
}
The problem is whether the user allows or denies the access to notification, the segue is not executed.
Thank you for your help.

Answer 1

You have to call the block parameter
Replace
current.requestAuthorization(options: options) { (granted, error) in
guard granted else{
return
}
if error != nil{
print(error?.localizedDescription ?? "")
}else{
Messaging.messaging().delegate = self
current.delegate = self
DispatchQueue.main.async {
application.registerForRemoteNotifications()
}
}
}
with
current.requestAuthorization(options: options) { (granted, error) in
if error != nil {
print(error?.localizedDescription ?? "")
block(false)
} else {
Messaging.messaging().delegate = self
current.delegate = self
DispatchQueue.main.async {
application.registerForRemoteNotifications()
block(granted)
}
}
}