facebook - flutter_facebook_login CocoaPods依赖错误

Question

我尝试将Facebook登录名添加到Flutter应用中。我正在使用flutter_facebook_login。但是当我尝试为iOS构建时给出错误:

    Resolving dependencies of `Podfile`
    [!] CocoaPods could not find compatible versions for pod "FBSDKLoginKit":
      In Podfile:
        flutter_facebook_login (from `.symlinks/plugins/flutter_facebook_login/ios`) was resolved to 0.0.1, which depends on
          FBSDKLoginKit (= 4.39.1)

    None of your spec sources contain a spec satisfying the dependency: `FBSDKLoginKit (= 4.39.1)`.

    You have either:
     * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
     * mistyped the name or version.
     * not added the source repo that hosts the Podspec to your Podfile.




Error: CocoaPods's specs repository is too out-of-date to satisfy dependencies.
To update the CocoaPods specs, run:
  pod repo update

Error running pod install
Error launching application on iPhone X.

我没有手动安装pod，因为flutter_facebook_login自述文件说:

(Note: you can skip "Step 2: Set up Your Development Environment").

有人帮忙吗？
谢谢!

Answer 1

根据这个diegoveloper的回答flutter_facebook_login github问题。
https://github.com/roughike/flutter_facebook_login/issues/201

flutter clean

删除ios/Podfile.lock文件

转到Podfile文件，从platform :ios, '9.0'更改为platform :ios, '11.0'(就我而言，某些库不支持11.0，我使用
平台:ios，'9.0
然后将runner.xcsworkspace中的部署目标设置为9.0，它就可以工作。)

转到终端ios目录并运行pod install

再次运行项目。