Alternative to Usernotificationcenterdelegate's Willpresent When App Is in Background

iOS 10 : Receive Remote Notification in background

I finally got this fixed after struggle 2 months by adding 2 things :

This is missing in all documentation and is to help all whom I wish not to struggle like me

|*| Try 1) : For Ios 10 background notification, Add following deligate method in AppDeligate :

func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings)
{
    application.registerForRemoteNotifications()
}

Got this solution from : https://codentrick.com/firebase-cloud-messaging-ios/

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|*| Try 2) : If using Firebase : Set a value in "info.plist"
Property List View :

FirebaseAppDelegateProxyEnabled -> NO

Source Code View :

<key>FirebaseAppDelegateProxyEnabled</key>
<false/>

I Had only mentioned FirebaseAppDelegateProxyEnable. So be careful of spelling too.

Background fetch execution time with iOS 10 UserNotifications without user interaction

I found a solution that doesn't work directly with the UserNotifications framework but still allows you to perform background jobs in iOS 10 via push notifications.

I found that by using the UIApplicationDelegate you can in fact perform background jobs via push notifications through the same function used in previous iOS versions:

- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo  fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))handler{

    //execute the background job here

}

All you have to do is add the content-available flag to the push before sending it and set it equal to 1.

Like so for js:

data: {
         alert: "Some alert",
         type: someType,
         "content-available": 1,
         id: someId
      }

Push notification issue with iOS 10

For iOS 10 using xCode 8 GM.

I have resolved my issue with following steps using xCode 8 GM for iOS 10:

1) In the targets, under Capabilities enable Push Notifications to add Push Notifications Entitlements.

2) Implement UserNotifications.framework into your app. Import UserNotifications.framework in your AppDelegate.

#import <UserNotifications/UserNotifications.h>
@interface AppDelegate : UIResponder   <UIApplicationDelegate,UNUserNotificationCenterDelegate>

@end

3) In didFinishLaunchingWithOptions method assign UIUserNotificationSettings and implement UNUserNotificationCenter delegate.

#define SYSTEM_VERSION_GRATERTHAN_OR_EQUALTO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{

if(SYSTEM_VERSION_GRATERTHAN_OR_EQUALTO(@"10.0")){
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    center.delegate = self;
    [center requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error){
         if( !error ){
             [[UIApplication sharedApplication] registerForRemoteNotifications];
         }
     }];  
}

return YES;
}

4) Now finally implement this two delegate methods.

//============For iOS 10=============

-(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{

    //Called when a notification is delivered to a foreground app. 

    NSLog(@"Userinfo %@",notification.request.content.userInfo);

    completionHandler(UNNotificationPresentationOptionAlert);
}

-(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)())completionHandler{

   //Called to let your app know which action was selected by the user for a given notification.

   NSLog(@"Userinfo %@",response.notification.request.content.userInfo);

}

Please remain the code as it is you are using for iOS 9,
Only add lines of code to support Push notification for iOS 10 using UserNotifications.framework.

Get push notification while App in foreground iOS

If the application is running in the foreground, iOS won't show a notification banner/alert. That's by design. But we can achieve it by using UILocalNotification as follows

• Check whether application is in active state on receiving a remote
  
  notification. If in active state fire a UILocalNotification.

  if (application.applicationState == UIApplicationStateActive ) {
  
      UILocalNotification *localNotification = [[UILocalNotification alloc] init];
      localNotification.userInfo = userInfo;
      localNotification.soundName = UILocalNotificationDefaultSoundName;
      localNotification.alertBody = message;
      localNotification.fireDate = [NSDate date];
      [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
  }
  

SWIFT:

if application.applicationState == .active {
    var localNotification = UILocalNotification()
    localNotification.userInfo = userInfo
    localNotification.soundName = UILocalNotificationDefaultSoundName
    localNotification.alertBody = message
    localNotification.fireDate = Date()
    UIApplication.shared.scheduleLocalNotification(localNotification)
}

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