FCM for iOS HowTo

fcm-ios-react-native.txt

# Extra info:
# https://firebase.google.com/docs/ios/setup

react-native init Twins
cd Twins

react-native run-ios

yarn add react-native-fcm
react-native link react-native-fcm

cd ios
pod init

Add the following line inside the Podfile
>> pod 'Firebase/Messaging'

pod install


open ios/Twins.xcworkspace
Build Settings > Header search path > add:
>>  '$(SRCROOT)/../node_modules/react-native-fcm/ios'

AppDelegate.h   (update)
@import UserNotifications;

@interface AppDelegate : UIResponder <UIApplicationDelegate,UNUserNotificationCenterDelegate>

AppDelegats.m  (update)
#import "RNFIRMessaging.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  //...
  
  [FIRApp configure];
  [[UNUserNotificationCenter currentNotificationCenter] setDelegate:self];
  
  // ...
}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler
{
  [RNFIRMessaging willPresentNotification:notification withCompletionHandler:completionHandler];
}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler
{
  [RNFIRMessaging didReceiveNotificationResponse:response withCompletionHandler:completionHandler];
}

//You can skip this method if you don't want to use local notification
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
  [RNFIRMessaging didReceiveLocalNotification:notification];
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(nonnull NSDictionary *)userInfo fetchCompletionHandler:(nonnull void (^)(UIBackgroundFetchResult))completionHandler{
  [RNFIRMessaging didReceiveRemoteNotification:userInfo fetchCompletionHandler:completionHandler];
}

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XCode

Select your project Capabilities and enable Keychan Sharing and Background Modes > Remote notifications.

In Xcode menu bar, select Product > Scheme > Manage schemes. 
Select your project name Scheme then click on the minus sign ― in the bottom left corner, then click on the plus sign + and rebuild your project scheme.

Twins scheme > Build > 
- Uncheck "Parallelize Builds"
- Add "React" and put it first
- Uncheck Analyze in Twins and React

# https://twitter.com/skellock/status/818813810781908992

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- Inside your project in the Firebase console, select the gear icon, select Project Settings, and then select the Cloud Messaging tab.
- Select the Upload Certificate button for your development certificate, your production certificate, or both. At least one is required.
- For each certificate, select the .p12 file, and provide the password, if any. Make sure the bundle ID for this certificate matches the bundle ID of your app. Select Save.

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