Ionic iOS build error with google-plus plugin

Question

How to resolve the following error? I'm not sure where to start...When trying to build my Ionic project for iOS, I get the following error:

$ ionic cordova build ios
....
/Plugins/cordova-plugin-googleplus/GooglePlus.h:2:9: fatal error: 'GoogleSignIn/GoogleSignIn.h' file not found
#import <GoogleSignIn/GoogleSignIn.h>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

It works great on Android! But I'm not sure what to do about this iOS build error. My current version of the plugin is: 5.3.0 "Google SignIn"

With the following info:

cli packages:

@ionic/cli-utils  : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : 8.0.0

local packages:

@ionic/app-scripts : 3.1.9
Cordova Platforms  : android 7.0.0 browser 5.0.3 ios 4.1.1
Ionic Framework    : ionic-angular 3.9.2

System:

Android SDK Tools : 26.1.1
ios-deploy        : 1.9.0
ios-sim           : 5.0.11
Node              : v8.11.1
npm               : 6.0.0
OS                : macOS Sierra
Xcode             : Xcode 9.2 Build version 9C40b

---

UPDATE: It does seem like a dependency error in xcode. I am trying to manually add the GoogleSignin SDK using the instructions here: https://developers.google.com/identity/sign-in/ios/sdk/

---

Resolved:

In xcode, I dragged and dropped the following 3 files (GoogleSignIn.bundle, GoogleSignIn.framework, GoogleSignInDependencies.framework) from the Google Sign-In SDK - making sure to check the “Copy items into destination group’s folder (if needed)” option.

Now when I build, the dependency to SignIn is resolved.

Answer 1

Went to: https://developers.google.com/+/mobile/ios/getting-started

Downloaded Google+ iOS SDK and added GoogleOpenSource.framework manually.