Swift 3 - Local Notification's didReceiveRemoteNotification function not fired - swift

Question

I have managed to schedule a notification and show it to the user when the app is running/not running in the foreground. Now I need to display a ViewController upon the tap of this notification.
I understand that didReceiveRemoteNotification is the function that is called when the user taps on a notification. In my case, This function is never fired.
AppDelegate:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
// Enable or disable features based on authorization.
}
return true
}
//didReceiveRemoteNotification goes here
The didReceiveRemoteNotification function:
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
if ( application.applicationState == UIApplicationState.active)
{
print("Active")
// App is foreground and notification is recieved,
// Show a alert.
}
else if( application.applicationState == UIApplicationState.background)
{
print("Background")
// App is in background and notification is received,
// You can fetch required data here don't do anything with UI.
}
else if( application.applicationState == UIApplicationState.inactive)
{
print("Inactive")
// App came in foreground by used clicking on notification,
// Use userinfo for redirecting to specific view controller.
}
}
This is the entire Notification related code in my AppDelegate. Am I missing something?

Answer 1

For UserNotifications framework you need to work with UNUserNotificationCenterDelegate, so implement UNUserNotificationCenterDelegate with AppDelegate and set the delegate in didFinishLaunchingWithOptions method.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
let center = UNUserNotificationCenter.current()
center.delegate = self
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
// Enable or disable features based on authorization.
}
return true
}
Now you need to implements userNotificationCenter(_:willPresent:withCompletionHandler:) and userNotificationCenter(_:didReceive:withCompletionHandler:) methods to get notification.
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
//Handle notification
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
// pull out the buried userInfo dictionary
let userInfo = response.notification.request.content.userInfo
if let customData = userInfo["customData"] as? String {
print("Custom data received: \(customData)")
switch response.actionIdentifier {
case UNNotificationDefaultActionIdentifier:
// the user swiped to unlock
print("Default identifier")
case "show":
// the user tapped our "show more info…" button
print("Show more information…")
break
default:
break
}
}
// you must call the completion handler when you're done
completionHandler()
}
You can also check this AppCoda tutorial Introduction to User Notifications Framework in iOS 10 for more details.