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# How to Avoid Common Push Notification Issues on iOS Devices Using Flutter, Objective-C, and MoEngage-iOS-SDK (Versions 7.x.x , 8.x.x, 9.x.x)?

> Resolve push notification issues on iOS with Flutter and Objective-C. Covers Firebase proxy settings, deep linking, and MoEngage SDK configuration.

## Problem

Common issues with Push notifications, including failed delivery, screen navigation, deep linking, and rich landing, are occurring on iOS devices using Flutter, Objective-C, and MoEngage-iOS-SDK (Versions 7.x.x, 8.x.x, 9.x.x).

## Solution

Perform the following steps:

1. **Firebase Proxy**:
   * If you are not using Firebase push notifications, then disable the Firebase proxy by adding the FirebaseAppDelegateProxyEnabled key in info.plist with the value Boolean = False/NO.
   * Test the push notification. If successful, no further action is required. Otherwise, follow the steps below.
   * If you are using Firebase push notifications, skip this step and proceed with the following steps.
2. **Disable MoEngage Proxy**:
   * Add MoEngageAppDelegateProxyEnabled key in info.plist with the value Boolean = false/NO
     <img alt="boolean.png" src="https://mintcdn.com/moengage/2FjM3dGfEH1CYo8k/images/moengage_6550ce.png?fit=max&auto=format&n=2FjM3dGfEH1CYo8k&q=85&s=240add700575e9c1980eb55215eda271" width="1958" height="570" data-path="images/moengage_6550ce.png" />
3. **Override didRegisterForRemoteNotificationsWithDeviceToken Function**:
   * Override the didRegisterForRemoteNotificationsWithDeviceToken function of the AppDelegate.m file.
     ```swift Objective-C theme={null}
     - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
     { 
       [super application: application didRegisterForRemoteNotificationsWithDeviceToken: deviceToken]; 
       
       //7.xx version
       [[MoEngage sharedInstance] setPushToken:deviceToken];
       
       //8.xx version
       [[MOMessaging sharedInstance] setPushToken:deviceToken];
       
       //9.xx version
       [[MoEngageSDKMessaging sharedInstance] setPushToken:deviceToken];
     }
     ```
4. **Override UNUserNotificatoinCenterDelegate Functions**:
   * Override the UNUserNotificatoinCenterDelegate functions in the AppDelegate.m file.
     ```objective-c Objective-C wrap theme={null}
     //Try without willPresent if it works good to go! else override it
     - (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
       if (notification.request.content.userInfo != nil) {
         NSDictionary *dictionary = notification.request.content.userInfo;
         if (dictionary[@"moengage"] != nil) {
           completionHandler(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge);
         } else {
           [super userNotificationCenter: center willPresentNotification: notification withCompletionHandler:completionHandler];
         }
     }
     - (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler
     {
       [super userNotificationCenter: center didReceiveNotificationResponse: response withCompletionHandler: completionHandler];
       
       //7.xx version
       [[MoEngage sharedInstance] userNotificationCenter:center didReceiveNotificationResponse:response];
       //8.xx version
       [[MOMessaging sharedInstance] userNotificationCenter:center didReceive:response];
       
       //9.xx version
       [[MoEngageSDKMessaging sharedInstance] userNotificationCenter:center didReceive:response];
       
       completionHandler();
     }
     ```