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

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Problem

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

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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. Set UNUserNotificationCenterDelegate:
   • In AppDelegate.swift, 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.
     Swift

     //7.xx
     import MoEngage
     //8.xx //9.xx
     import MoEngageSDK
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) - Bool {
       
       UNUserNotificationCenter.current().delegate = self
       
       FIRApp.configure() //Firebase configuration - syntax could differ according to versions
       //MoEngage Initializatoin - use specific version code only
       
       //7.xx version with sdkConfig
       var sdkConfig = MOSDKConfig.init(appID: "XXXXXXXXXXXXXXXX")
       sdkConfig.moeDataCenter = DATA_CENTER_0X
       sdkConfig.appGroupID = "group.com.XXXXXXXXXXXXXXXX"
       #if DEBUG
           MoEngage.sharedInstance().initializeTest(with: sdkConfig, andLaunchOptions: launchOptions)
       #else
           MoEngage.sharedInstance().initializeLive(with: sdkConfig, andLaunchOptions: launchOptions)
       #endif
       
       //8.xx version with sdkConfig
       var sdkConfig = MOSDKConfig.init(withAppID: "XXXXXXXXXXXXXXXX")
       sdkConfig.enableLogs = true
       sdkConfig.moeDataCenter = .data_center_0X 
       sdkConfig.appGroupID = "group.com.XXXXXXXXXXXXXXXX"
       #if DEBUG
         MoEngage.sharedInstance().initializeDefaultTestInstance(with: sdkConfig, andLaunchOptions: launchOptions)
       #else
         MoEngage.sharedInstance().initializeDefaultLiveInstance(with: sdkConfig, andLaunchOptions: launchOptions)
       #endif
       //9.xx version with sdkConfig
       var sdkConfig = MoEngageSDKConfig.init(appId: "XXXXXXXXXXXXXXXX", dataCenter: .data_center_0X)
       sdkConfig.enableLogs = true
       sdkConfig.appGroupID = "group.com.XXXXXXXXXXXXXXXX"
       #if DEBUG
         MoEngage.sharedInstance.initializeDefaultTestInstance(sdkConfig)
       #else
         MoEngage.sharedInstance.initializeDefaultLiveInstance(sdkConfig)
       #endif
       
       // Rest of the implementation related to developer's app
       return true
     }
     
3. Extend AppDelegate.swift:
   • Extend AppDelegate.swift to conform to UNUserNotificationCenterDelegate. Your AppDelegate.swift must resemble the following code snippets:
     Swift

     class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {
     }
     
4. Disable MoEngage Proxy:
   • Add MoEngageAppDelegateProxyEnabled key in info.plist with the value Boolean = False/NO
5. Pass Push Notification Token Manually:
   • Use the didRegisterForRemoteNotificationsWithDeviceToken function of AppDelegate.swift to pass the push notification token manually.
     Swift

     func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
       //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.swift.
     Swift

     func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) - Void) {
       //This is to only to display Alert and enable notification sound
       if #available(iOS 14.0, *) {
         completionHandler([.sound,.alert, .banner, .list])
       } else {
         completionHandler([.sound,.alert])
       }
     }
     func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () - Void) {
       //7.xx version
       MoEngage.sharedInstance().userNotificationCenter(center, didReceive: response)
       
       //8.xx version
       MOMessaging.sharedInstance.userNotificationCenter(center, didReceive: response)
       
       //9.xx version
       MoEngageSDKMessaging.sharedInstance.userNotificationCenter(center, didReceive: response)
     }