How to handle push notification allow from settings in iOS - ios

Question

I have Integrated the push notification in my app. I am getting the device token in my AppDelegate and sending to the server in my LoginViewController. When alert comes if user click on "Don't allow" I am not calling my device registration service. But I have no idea how to handle this scenario.
If user click on don't allow in the push notification alert and go inside the app, then he open device settings and enable the push notification.
In this case how can I call my device registration service?
Please help me
Thanks

Answer 1

Actually there is no delegate for it to observe that user changed the status for push notifications.
But you can check by using this method in applicationDidBecomeActive: method like this
Objective C :
iOS 8 and above
if (![[UIApplication sharedApplication] isRegisteredForRemoteNotifications]){
NSLog(#"push notifications are disabled");
}
For iOS 10
UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
if (types == UIRemoteNotificationTypeNone) {
NSLog(#"push notifications are disabled");
}
Swift :
iOS 8 and above
let isRegisteredForRemoteNotifications = UIApplication.shared.isRegisteredForRemoteNotifications
if isRegisteredForRemoteNotifications {
NSLog(#"push notifications are enabled");
} else {
NSLog(#"push notifications are disabled");
}
For iOS 10
let current = UNUserNotificationCenter.current()
current.getNotificationSettings(completionHandler: { (settings) in
if settings.authorizationStatus == .denied {
NSLog(#"push notifications are disabled");
}
})
Hope it helps.

Answer 2

Note
Any changes in the settings restart the app.
so If user turn on the notification from settings then your app will be restarted and you will get the device token in app-delegate and you can send it to your server. if your login is save locally and you were sending device_token in login api, then you need to use a separate service to send device_token to server.

Answer 3

In AppDelegate
If user Allow Notification, the token will be returned in func bellow and you will call your service to sending to your server
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
}
If user Don't Allow Notification, you will receive error in func bellow
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
}