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

> Troubleshoot iOS push notification delivery, deep linking, and rich landing issues with Native iOS Objective-C and MoEngage SDK versions 7-9.x.x.

## Problem

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

## Solution

Perform the following steps:

1. **Disable Firebase Proxy**:
   * If you are not using Firebase push notifications, disable the Firebase proxy by adding the FirebaseAppDelegateProxyEnabled key in info.plist with the value Boolean = False/NO.
   * Test the push notification. If it works, no further action is needed.
   * If you are using Firebase push notifications, skip this step and proceed with the following steps.
2. **Set UNUserNotificationCenterDelegate**:
   * In AppDelegate.m, set UNUserNotificationCenterDelegate in the didFinishLaunch method.
   * If you are initializing Firebase in didFinishLaunch, do so before initializing the MoEngage SDK.
   * Ensure UNUserNotificationCenterDelegate is set at the start of this method.
     ```objective-c Objective-C wrap theme={null}
     //7.xx
     #import 
     //8.xx
     #import 
     //9.xx
     @import MoEngageSDK;
     @implementation AppDelegate
       
      - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
     {
       UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
       center.delegate = self;
       
       [FIRApp configure]; //Firebase configuration syntx could differ according to versions
       
       //MoEngage Initializatoin - use specific version code only
         
       //7.xx version with sdkConfig
       MOSDKConfig* sdkConfig = [[MOSDKConfig alloc] initWithAppID: @"XXXXXXXXXXXXXXXX"];
       sdkConfig.moeDataCenter = DATA_CENTER_0X;
       sdkConfig.appGroupID = @"group.com.XXXXXXXXXXXXXXXX";
       #ifdef DEBUG
         [[MoEngage sharedInstance] initializeTestWithConfig:sdkConfig andLaunchOptions:launchOptions];
       #else
         [[MoEngage sharedInstance] initializeLiveWithConfig:sdkConfig andLaunchOptions:launchOptions];
       #endif
       
       //8.xx version with sdkConfig
       MOSDKConfig* sdkConfig = [[MOSDKConfig alloc] initWithAppID:@"XXXXXXXXXXXXXXXX"];
       sdkConfig.enableLogs = true;
       sdkConfig.moeDataCenter = MODataCenterData_center_0X; 
       sdkConfig.appGroupID = @"group.com.XXXXXXXXXXXXXXXX";
       #ifdef DEBUG
         [[MoEngage sharedInstance] initializeDefaultTestInstanceWithConfig:sdkConfig andLaunchOptions:nil];
       #else
         [[MoEngage sharedInstance] initializeDefaultLiveInstanceWithConfig:sdkConfig andLaunchOptions:nil];
       #endif
       
       //9.xx version with sdkConfig
       MoEngageSDKConfig* sdkConfig = [[MoEngageSDKConfig alloc] initWithAppId:@"XXXXXXXXXXXXXXXX" dataCenter: MoEngageDataCenterData_center_0X];
       MoEngageConsoleLogConfig *logConfig = [[MoEngageConsoleLogConfig alloc] initWithIsLoggingEnabled:YES loglevel:MoEngageLoggerTypeVerbose];
       sdkConfig.consoleLogConfig = logConfig;
       sdkConfig.appGroupID = @"group.com.XXXXXXXXXXXXXXXX";
       #ifdef DEBUG
         [[MoEngage sharedInstance] initializeDefaultTestInstance:sdkConfig];
       #else
         [[MoEngage sharedInstance] initializeDefaultLiveInstance:sdkConfig];
       #endif
       
       // Rest of the implementation related to developer's app
       
       return YES;
     }
     ```
3. **Extend AppDelegate.h**:
   * Extend AppDelegate.h to conform to UNUserNotificationCenterDelegate. Your AppDelegate.h must resemble the following code snippets:
     ```objective-c Objective-C wrap theme={null}
     #import 
     @interface AppDelegate : UIResponder <uiapplicationdelegate, unusernotificationcenterdelegate="UNUserNotificationCenterDelegate"></uiapplicationdelegate,>
     ```
4. **Disable MoEngage Proxy**:
   * Add MoEngageAppDelegateProxyEnabled key in info.plist with the value Boolean = False/NO
     <img alt="boolean.png" src="https://mintcdn.com/moengage/2kQqTYC5RUPSd8kI/images/moengage_3e6d66.png?fit=max&auto=format&n=2kQqTYC5RUPSd8kI&q=85&s=91b4bc85514124dcd236145f0b8da18f" width="1958" height="570" data-path="images/moengage_3e6d66.png" />
5. **Pass Push Notification Token Manually**:
   * Use the didRegisterForRemoteNotificationsWithDeviceToken function of AppDelegate.m to pass the push notification token manually.
     ```objective-c Objective-C theme={null}
     - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
     {
       //7.xx version
       [[MoEngage sharedInstance] setPushToken:deviceToken];
       
       //8.xx version
       [[MOMessaging sharedInstance] setPushToken:deviceToken];
       
       //9.xx version
       [[MoEngageSDKMessaging sharedInstance] setPushToken:deviceToken];
     }
     ```
6. **Implement UNUserNotificatoinCenter Delegate Functions**:
   * Ensure UNUserNotificatoinCenter Delegate functions are implemented in AppDelegate.m.
     ```objective-c Objective-C wrap theme={null}
     -(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler
     {
       if (@available(iOS 14.0, *)) {
         completionHandler(UNNotificationPresentationOptionBadge | UNNotificationPresentationOptionSound | UNNotificationPresentationOptionList | UNNotificationPresentationOptionBanner);
       } else {
         // Fallback on earlier versions
         completionHandler(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge);
       }
     }
     - (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))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();
     }
     ```