title: Unable to receive FCM push notification IOS - Objective C
body: <p>I am new to IOS development and FCM Push notification. I tried to use FCM notification in my project(Objective c) it creates the <strong>fcm code</strong> but it is not receiving any message.</p>
  
  <p>I have searched a lot regarding this issue in google but i have not got any relevant results regarding Objective C.</p>
  
  <p><strong>AppDelegate.h</strong></p>
  
  <pre><code>#import &lt;UIKit/UIKit.h&gt;
  @import Firebase;
  
  @interface AppDelegate : UIResponder &lt;UIApplicationDelegate,  FIRMessagingDelegate&gt;
  @property (strong, nonatomic) UIWindow *window;
  @end
  </code></pre>
  
  <p><strong>AppDelegate.m</strong></p>
  
  <pre><code>#import "AppDelegate.h"
  
  #if defined(__IPHONE_10_0) &amp;&amp; __IPHONE_OS_VERSION_MAX_ALLOWED &gt;= __IPHONE_10_0
  @import UserNotifications;
  #endif
  
  // Implement UNUserNotificationCenterDelegate to receive display notification via APNS for devices
  // running iOS 10 and above.
  #if defined(__IPHONE_10_0) &amp;&amp; __IPHONE_OS_VERSION_MAX_ALLOWED &gt;= __IPHONE_10_0
  @interface AppDelegate () &lt;UNUserNotificationCenterDelegate&gt;
  @end
  #endif
  
  // Copied from Apple's header in case it is missing in some cases (e.g. pre-Xcode 8 builds).
  #ifndef NSFoundationVersionNumber_iOS_9_x_Max
  #define NSFoundationVersionNumber_iOS_9_x_Max 1299
  #endif
  
  @interface AppDelegate ()
  
  @end
  
  @implementation AppDelegate
  
  NSString *const kGCMMessageIDKey = @"gcm.message_id";
  
  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
      // [START configure_firebase]
      [FIRApp configure];
      // [END configure_firebase]
  
      // [START set_messaging_delegate]
      [FIRMessaging messaging].delegate = self;
      // [END set_messaging_delegate]
  
      // Register for remote notifications. This shows a permission dialog on first run, to
      // show the dialog at a more appropriate time move this registration accordingly.
      if (floor(NSFoundationVersionNumber) &lt;= NSFoundationVersionNumber_iOS_7_1) {
          // iOS 7.1 or earlier. Disable the deprecation warnings.
  #pragma clang diagnostic push
  #pragma clang diagnostic ignored "-Wdeprecated-declarations"
          UIRemoteNotificationType allNotificationTypes =
          (UIRemoteNotificationTypeSound |
           UIRemoteNotificationTypeAlert |
           UIRemoteNotificationTypeBadge);
          [application registerForRemoteNotificationTypes:allNotificationTypes];
  #pragma clang diagnostic pop
      } else {
          // iOS 8 or later
          // [START register_for_notifications]
          if (floor(NSFoundationVersionNumber) &lt;= NSFoundationVersionNumber_iOS_9_x_Max) {
              UIUserNotificationType allNotificationTypes =
              (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
              UIUserNotificationSettings *settings =
              [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
              [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
          } else {
              // iOS 10 or later
  #if defined(__IPHONE_10_0) &amp;&amp; __IPHONE_OS_VERSION_MAX_ALLOWED &gt;= __IPHONE_10_0
              // For iOS 10 display notification (sent via APNS)
              [UNUserNotificationCenter currentNotificationCenter].delegate = self;
              UNAuthorizationOptions authOptions =
              UNAuthorizationOptionAlert
              | UNAuthorizationOptionSound
              | UNAuthorizationOptionBadge;
              [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:authOptions completionHandler:^(BOOL granted, NSError * _Nullable error) {
              }];
  #endif
          }
  
          [[UIApplication sharedApplication] registerForRemoteNotifications];
          // [END register_for_notifications]
      }
      return YES;
  }
  
  
  - (void)applicationWillResignActive:(UIApplication *)application {
      // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
      // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
  }
  
  
  - (void)applicationDidEnterBackground:(UIApplication *)application {
      // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
      // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
  }
  
  
  - (void)applicationWillEnterForeground:(UIApplication *)application {
      // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
  }
  
  
  - (void)applicationDidBecomeActive:(UIApplication *)application {
      // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
  }
  
  
  - (void)applicationWillTerminate:(UIApplication *)application {
      // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
  }
  
  
  
  
  
  // [START receive_message]
  - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
      // If you are receiving a notification message while your app is in the background,
      // this callback will not be fired till the user taps on the notification launching the application.
      // TODO: Handle data of notification
  
      // With swizzling disabled you must let Messaging know about the message, for Analytics
      // [[FIRMessaging messaging] appDidReceiveMessage:userInfo];
  
      // Print message ID.
      if (userInfo[kGCMMessageIDKey]) {
          NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
      }
  
      // Print full message.
      NSLog(@"%@", userInfo);
  }
  
  - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
  fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
      // If you are receiving a notification message while your app is in the background,
      // this callback will not be fired till the user taps on the notification launching the application.
      // TODO: Handle data of notification
  
      // With swizzling disabled you must let Messaging know about the message, for Analytics
      // [[FIRMessaging messaging] appDidReceiveMessage:userInfo];
  
      // Print message ID.
      if (userInfo[kGCMMessageIDKey]) {
          NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
      }
  
      // Print full message.
      NSLog(@"%@", userInfo);
  
      completionHandler(UIBackgroundFetchResultNewData);
  }
  // [END receive_message]
  
  // [START ios_10_message_handling]
  // Receive displayed notifications for iOS 10 devices.
  #if defined(__IPHONE_10_0) &amp;&amp; __IPHONE_OS_VERSION_MAX_ALLOWED &gt;= __IPHONE_10_0
  // Handle incoming notification messages while app is in the foreground.
  - (void)userNotificationCenter:(UNUserNotificationCenter *)center
         willPresentNotification:(UNNotification *)notification
           withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
      NSDictionary *userInfo = notification.request.content.userInfo;
  
      // With swizzling disabled you must let Messaging know about the message, for Analytics
      // [[FIRMessaging messaging] appDidReceiveMessage:userInfo];
  
      // Print message ID.
      if (userInfo[kGCMMessageIDKey]) {
          NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
      }
  
      // Print full message.
      NSLog(@"%@", userInfo);
  
      // Change this to your preferred presentation option
      completionHandler(UNNotificationPresentationOptionNone);
  }
  
  // Handle notification messages after display notification is tapped by the user.
  - (void)userNotificationCenter:(UNUserNotificationCenter *)center
  didReceiveNotificationResponse:(UNNotificationResponse *)response
           withCompletionHandler:(void (^)())completionHandler {
      NSDictionary *userInfo = response.notification.request.content.userInfo;
      if (userInfo[kGCMMessageIDKey]) {
          NSLog(@"Message ID: %@", userInfo[kGCMMessageIDKey]);
      }
  
      // Print full message.
      NSLog(@"%@", userInfo);
  
      completionHandler();
  }
  #endif
  // [END ios_10_message_handling]
  
  // [START refresh_token]
  - (void)messaging:(nonnull FIRMessaging *)messaging didRefreshRegistrationToken:(nonnull NSString *)fcmToken {
      // Note that this callback will be fired everytime a new token is generated, including the first
      // time. So if you need to retrieve the token as soon as it is available this is where that
      // should be done.
      NSLog(@"FCM registration token: %@", fcmToken);
  
      // TODO: If necessary send token to application server.
  }
  // [END refresh_token]
  
  // [START ios_10_data_message]
  // Receive data messages on iOS 10+ directly from FCM (bypassing APNs) when the app is in the foreground.
  // To enable direct data messages, you can set [Messaging messaging].shouldEstablishDirectChannel to YES.
  - (void)messaging:(FIRMessaging *)messaging didReceiveMessage:(FIRMessagingRemoteMessage *)remoteMessage {
      NSLog(@"Received data message: %@", remoteMessage.appData);
  }
  // [END ios_10_data_message]
  
  - (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
      NSLog(@"Unable to register for remote notifications: %@", error);
  }
  
  // This function is added here only for debugging purposes, and can be removed if swizzling is enabled.
  // If swizzling is disabled then this function must be implemented so that the APNs device token can be paired to
  // the FCM registration token.
  - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
      NSLog(@"APNs device token retrieved: %@", deviceToken);
  
      // With swizzling disabled you must set the APNs device token here.
      // [FIRMessaging messaging].APNSToken = deviceToken;
  }
  
  
  @end
  </code></pre>
  
  <p>I have just created this IOS project for testing purpose.</p>