React本机处理FCM消息的IOS权限

#import <Firebase.h>
#import <UserNotifications/UserNotifications.h>

// ...

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  // ...

  if ([UNUserNotificationCenter class] != nil) {
    [UNUserNotificationCenter currentNotificationCenter].delegate = self;
  }

  // ...

  [FIRApp configure];

  // ...

  return YES;
}

// ...

// Add the following methods to handle FCM token registration and message reception

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
  [FIRMessaging messaging].APNSToken = deviceToken;
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
  [[FIRMessaging messaging] appDidReceiveMessage:userInfo];

  // Handle your custom logic for receiving FCM messages here

  completionHandler(UIBackgroundFetchResultNoData);
}

// ...

// Add the following method to handle user's response to notifications

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler
{
  [[FIRMessaging messaging] appDidReceiveMessage:response.notification.request.content.userInfo];

  // Handle your custom logic for user's response to notifications here

  completionHandler();
}