Push notification not received when App is in Background in iOS 10

For iOS 10, we need to call the 2 methods below.

For FOREGROUND state

- (void)userNotificationCenter:(UNUserNotificationCenter *)center  willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler  
{  
    NSLog( @"Handle push from foreground" );  
    // custom code to handle push while app is in the foreground  
    NSLog(@"%@", notification.request.content.userInfo);
    completionHandler(UNNotificationPresentationOptionAlert);
} 

For BACKGROUND state

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler  
{  
    NSLog( @"Handle push from background or closed" );  
    // if you set a member variable in didReceiveRemoteNotification, you  will know if this is from closed or background  
    NSLog(@"%@", response.notification.request.content.userInfo);
    completionHandler();
}  

Before that, we must add the UserNotifications framework and import in the AppDelegate.h file

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