Use of undeclared identifier 'FBSDKApplicationDelegate' when archiving

[aurelienshz]

🐛 Bug Report

When attempting to archive a release version of the app, the build fails with the following error:

use of undeclared identifier 'FBSDKApplicationDelegate'

The incriminating file is AppDelegate.m, in the two methods that the "Get Started" guide recommends tweaking in this file (didFinishLaunchingWithOptions and openURL).

To Reproduce

I have been able to reproduce the issue with a fresh project:

# Our main project is using TypeScript:
react-native init FBSDKErrorReproduction --template react-native-template-typescript
yarn add react-native-fbsdk
cd ios
pod install

After completing those steps and adding didFinishLaunchingWithOptions and openURL to AppDelegate.m, verify the app runs fine in the simulator. However, a production build will fail with the following error:

For searchability purposes:

/Users/aurelien/Projects/xxx/ios/yyy/AppDelegate.m:36:5: error: use of undeclared identifier 'FBSDKApplicationDelegate'
  [[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];
    ^
/Users/aurelien/Projects/xxx/ios/yyy/AppDelegate.m:66:20: error: use of undeclared identifier 'FBSDKApplicationDelegate'
  BOOL handled = [[FBSDKApplicationDelegate sharedInstance] application:application
                   ^
2 errors generated.

Expected Behavior

The production build completes with no error.

Code Example

Here is a minimal repository reproducing the issue: https://github.com/aurelienshz/fbsdk-build-error-repro

Environment

System:
    OS: macOS Mojave 10.14.6
    CPU: (4) x64 Intel(R) Core(TM) i7-7660U CPU @ 2.50GHz
    Memory: 168.85 MB / 16.00 GB
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 10.14.1 - /usr/local/bin/node
    Yarn: 1.15.2 - /usr/local/bin/yarn
    npm: 6.4.1 - /usr/local/bin/npm
    Watchman: Not Found
  Managers:
    CocoaPods: 1.6.1 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
    Android SDK:
      API Levels: 23, 25, 26, 27, 28
      Build Tools: 23.0.1, 23.0.3, 27.0.3, 28.0.3
      System Images: android-22 | Google APIs ARM EABI v7a, android-22 | Google APIs Intel x86 Atom_64, android-23 | Google APIs Intel x86 Atom, android-26 | Google Play Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: 3.6 AI-192.7142.36.36.6308749
    Xcode: 10.1/10B61 - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_192 - /usr/bin/javac
    Python: 2.7.16 - /usr/bin/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.11.0 => 16.11.0 
    react-native: 0.62.1 => 0.62.1 
  npmGlobalPackages:
    *react-native*: Not Found

[joeyscarim]

I ran into this today also.

From the FB iOS quickstart guide at https://developers.facebook.com/quickstarts/:

#import <FBSDKCoreKit/FBSDKCoreKit.h>

- (void)applicationDidBecomeActive:(UIApplication *)application {
  [FBSDKAppEvents activateApp];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  [[FBSDKApplicationDelegate sharedInstance] application:application
                           didFinishLaunchingWithOptions:launchOptions];
  return YES;
}

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
  return [[FBSDKApplicationDelegate sharedInstance] application:application
                                                         openURL:url
                                               sourceApplication:sourceApplication
                                                      annotation:annotation];
}

[aurelienshz]

Weeelllll...

One the one hand, I was missing the applicationDidBecomeActive part. But I don't think that could be the issue here.

On the other hand, now that I have added it, I have 3 build errors instead of two!

Thanks for chiming in, but it looks like we're still looking for a solution here 🙂

[aurelienshz]

After starting to question my own sanity, I realized that I had mindlessly put the #import <FBSDKCoreKit/FBSDKCoreKit.h> after the last import and before the first method definition of AppDelegate.m:

#import "AppDelegate.h"

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>

#if DEBUG
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>

#import <FBSDKCoreKit/FBSDKCoreKit.h>

static void InitializeFlipper(UIApplication *application) {
  FlipperClient *client = [FlipperClient sharedClient];
  SKDescriptorMapper *layoutDescriptorMapper = [[SKDescriptorMapper alloc] initWithDefaults];
  [client addPlugin:[[FlipperKitLayoutPlugin alloc] initWithRootNode:application withDescriptorMapper:layoutDescriptorMapper]];
  [client addPlugin:[[FKUserDefaultsPlugin alloc] initWithSuiteName:nil]];
  [client addPlugin:[FlipperKitReactPlugin new]];
  [client addPlugin:[[FlipperKitNetworkPlugin alloc] initWithNetworkAdapter:[SKIOSNetworkAdapter new]]];
  [client start];
}
#endif

...which puts #import <FBSDKCoreKit/FBSDKCoreKit.h> right in the middle of an #if DEBUG/#endif block

...which makes it perfectly normal and expected that the identifiers brought by this import aren't declared when archiving a release build.

~I will now contemplate all my life choices and consider switching careers.~

Thanks for your help!

[bradjin8]

Thanks, @aurelienshz, In my case, the import statements are in the middle of this block #ifdef FB_SONARKIT_ENABLED / #endif After taking them back from the blocks, archiving was succeeded.

Before:

#import "AppDelegate.h"

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import <RNGoogleSignin/RNGoogleSignin.h>

#ifdef FB_SONARKIT_ENABLED
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>
...
#endif

After:

#import "AppDelegate.h"

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import <RNGoogleSignin/RNGoogleSignin.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

#ifdef FB_SONARKIT_ENABLED
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>
...
#endif