Upgrading Amplify packages

Common Issues

Below are common problems that can occur when upgrading Amplify and suggestions on how to resolve the issues.

CocoaPods could not find compatible versions for pod "Amplify"

When does this occur?

On the first iOS build after upgrading the version of the Amplify packages in your pubspec.yaml.

Example

Below is an example of what the error will look like:

1[!] CocoaPods could not find compatible versions for pod "Amplify":
2  In snapshot (Podfile.lock):
3    Amplify (= 1.6.0)
4  In Podfile:
5    amplify_auth_cognito (from `.symlinks/plugins/amplify_auth_cognito/ios`) was resolved to 0.0.1, which depends on
6      Amplify (> 1.9.2)
7You have either:
8 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
9 * changed the constraints of dependency `Amplify` inside your development pod `amplify_auth_cognito`.
10   You should run `pod update Amplify` to apply changes you've made.

Why does this occur?

The flutter Amplify packages depend on native iOS Amplify libraries when targeting iOS. New versions of the flutter Amplify packages will often depend on new versions of the native iOS Amplify libraries. Your project will likely have a Podfile.lock file that locks all pods to a specific version. The error message that you see is telling you that the version in your Podfile.lock and the version required by the new version of the amplify flutter packages are conflicting.

Suggested resolution

Option 1 (recommended): Run pod update Amplify AWSPluginsCore AmplifyPlugins from the ios dir. This will update the pods that are used by the amplify flutter packages.
Option 2: Delete the Podfile.lock (in the ios dir) and rebuild. A new Podfile.lock will be generated. Please note, this may cause other non amplify related dependencies to be updated as well.
Option 3: Run pod update from the ios dir. This should update your Podfile.lock file. Please note, this may cause other non amplify related dependencies to be updated as well.