코드 작성 Objective-c // AppDelegate.h #import // 추가 @protocol FIRMessagingDelegate; @interface AppDelegate : UIResponder @end // AppDelegate.m #import "AppDelegate.h" @import FirebaseCore; // 추가 @import FirebaseMessaging; @import UserNotifications; @interface AppDelegate () @end @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary ..