ios - Duplicate interface definition for class 'GTMHTTPUploadFetcher'

Question

I plan to use Google Drive API in my Swift project. I'm trying to add the Drive SDK via CocoaPods (v0.39.0). Below is my Podfile.

platform :ios, '8.0'
use_frameworks!

pod 'Google-API-Client/Drive'

I have the use_frameworks! flag added so that CocoaPods can convert Objective-C pods to Swift frameworks instead of static libraries.

Pod installation is successful. However when I build the project, I get the following error.

Duplicate interface definition for class 'GTMHTTPUploadFetcher'

Deleting DerivedData folder and cleaning the project didn't work.

I also tried without adding the use_frameworks! and then adding the library via a bridging header way. That works without an issue. The thing is all my other dependencies work with it turned on. And unfortunately CocoaPods doesn't support turning that flag for certain pods only.

Is there a workaround to resolve this issue?

---

As stated in Google's docs, Google engineers supposedly monitor questions tagged with google-drive-sdk so I hope at least they'll see this and fix it soon.

Answer 1

According to Google this error is caused by using a cocoapod by a third party, but they now have an official pod in the project (https://github.com/google/google-api-objectivec-client/blob/master/GoogleAPIClient.podspec) and the problem should be fixed.

See: https://github.com/google/google-api-objectivec-client/issues/103

Use:

pod 'GoogleAPIClient/Drive', '~> 1.0'

and probably also:

pod 'GTMOAuth2' or pod 'Google/SignIn'