Use of undeclared identifier 'FIRMessaging' - ios

Question

I am trying to follow the guide here: https://firebase.google.com/docs/cloud-messaging/ios/send-image
I create a new project In Xcode and with my app project open, navigate to File > Add Packages and then I enter https://github.com/firebase/firebase-ios-sdk. After I went to New > Target > Notification Service Extension (embedded this new target into the original target) and pasted in NotificationService.m:
#interface NotificationService ()
#property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);
#property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;
#end
#implementation NotificationService
- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
self.contentHandler = contentHandler;
self.bestAttemptContent = [request.content mutableCopy];
// Modify the notification content here...
self.bestAttemptContent.title = [NSString stringWithFormat:#"%# [modified]", self.bestAttemptContent.title];
// Call FIRMessaging extension helper API.
[[FIRMessaging extensionHelper] populateNotificationContent:self.bestAttemptContent
withContentHandler:contentHandler];
self.contentHandler(self.bestAttemptContent);
}
- (void)serviceExtensionTimeWillExpire {
// Called just before the extension will be terminated by the system.
// Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
self.contentHandler(self.bestAttemptContent);
}
#end
I am now getting Use of undeclared identifier 'FIRMessaging' in NotificationService.m.
What did I forget?

Answer 1

In Podfile, use code for pod file
platform :ios, '11.0'
def same_pods
pod 'Firebase/Messaging'
end
target 'Project' do
use_frameworks!
pod 'Firebase', "~> 7.0"
target 'NotificationServiceExt' do
inherit! :search_paths
end
post_install do |installer|
installer.pods_project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64 i386"
end
end
installer.generated_projects.each do |project|
project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['CODE_SIGNING_ALLOWED'] = 'NO'
end
end
end
end
end
Install the pod file and, in NotificationService file
#import "NotificationService.h"
#import Firebase;
#interface NotificationService ()
#property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);
#property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;
#end
#implementation NotificationService
- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
self.contentHandler = contentHandler;
self.bestAttemptContent = [request.content mutableCopy];
// Modify the notification content here as you wish
self.bestAttemptContent.title = [NSString stringWithFormat:#"%#",
self.bestAttemptContent.title];
// Call FIRMessaging extension helper API.
[[FIRMessaging extensionHelper] populateNotificationContent:self.bestAttemptContent withContentHandler:contentHandler];
}
- (void)serviceExtensionTimeWillExpire {
// Called just before the extension will be terminated by the system.
// Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
self.contentHandler(self.bestAttemptContent);
}
#end