CocoaPods could not find compatible versions for pod "FirebaseCore" : error on running pod install for flutter iOS build

Question

I am getting this error below on running "pod install" with the latest firebase_core sdk, on flutter for iOS. I cleared the Pod, symlinks folders and deleted the Podfile.lock file, and ran pod install, but the result is the same as below. What is the issue here?

Analyzing dependencies
cloud_firestore: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
firebase_auth: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
firebase_core: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
Warning: firebase_app_id_file.json file does not exist. This may cause issues in upload-symbols. If this error is unexpected, try running flutterfire configure again.
firebase_crashlytics: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
firebase_dynamic_links: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
firebase_messaging: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
firebase_storage: Using Firebase SDK version '9.2.0' defined in 'firebase_core'
**[!] CocoaPods could not find compatible versions for pod "FirebaseCore":
  In Podfile:
    firebase_core (from `.symlinks/plugins/firebase_core/ios`) was resolved to 1.19.2, which depends on
      Firebase/CoreOnly (= 9.2.0) was resolved to 9.2.0, which depends on
        FirebaseCore (= 9.2.0)

    firebase_storage (from `.symlinks/plugins/firebase_storage/ios`) was resolved to 10.3.2, which depends on
      Firebase/Storage (= 9.2.0) was resolved to 9.2.0, which depends on
        FirebaseStorage (~> 9.2.0) was resolved to 9.2.0, which depends on
          FirebaseCore (~> 9.0)

    google_ml_kit (from `.symlinks/plugins/google_ml_kit/ios`) was resolved to 0.6.0, which depends on
      GoogleMLKit/LinkFirebase (~> 2.2.0) was resolved to 2.2.0, which depends on
        MLKitLinkFirebase (~> 1.3.0) was resolved to 1.3.0, which depends on
          FirebaseCore (~> 8.0)

CocoaPods could not find compatible versions for pod "MLKitVision":
  In Podfile:
    google_ml_kit (from `.symlinks/plugins/google_ml_kit/ios`) was resolved to 0.6.0, which depends on
      GoogleMLKit/ImageLabeling (~> 2.2.0) was resolved to 2.2.0, which depends on
        MLKitImageLabeling (~> 1.3.0) was resolved to 1.3.0, which depends on
          MLKitVision (~> 1.3)

    google_ml_kit (from `.symlinks/plugins/google_ml_kit/ios`) was resolved to 0.6.0, which depends on
      GoogleMLKit/PoseDetection (~> 2.2.0) was resolved to 2.2.0, which depends on
        MLKitPoseDetection (~> 1.0.0-beta4) was resolved to 1.0.0-beta6, which depends on
          MLKitXenoCommon (= 1.0.0-beta6) was resolved to 1.0.0-beta6, which depends on
            MLKitVision (~> 2.0)**

Answer 1

Delete Pods folder, .symlinks folder and Podfile.lock. Then run pod install and try again

Answer 2

Install clean:

sudo gem install cocoapods-clean

Run deintegrate in the folder of the project:

pod deintegrate

Modify your podfile (delete the lines with the pods you don't want to use anymore) and run:

pod install

pod update

Answer 3

去做就对了：

pod repo update && pod install --repo-update

Answer 4

You can reference these link: https://github.com/googleads/googleads-mobile-flutter/issues/594 https://github.com/firebase/flutterfire/issues/9152

I changed this in file pubspec.yaml and resolve my problem

google_mobile_ads:
git:
  url: https://github.com/googleads/googleads-mobile-flutter
  ref: 356875362ddb2ac2e0056385d2729c093722fb8d
  path: packages/google_mobile_ads

Here is my final file

#  google_mobile_ads: ^1.3.0
  google_mobile_ads:
    git:
      url: https://github.com/googleads/googleads-mobile-flutter
      ref: 356875362ddb2ac2e0056385d2729c093722fb8d
      path: packages/google_mobile_ads
#  firebase_core:  ^1.20.0
  firebase_core:  ^1.18.0
#  firebase_analytics: ^9.3.0
  firebase_analytics: ^9.1.10