Question

我将项目升级到本机版本0.64后，awsmplify无法正常工作。主要是，我正在尝试进行身份验证工作流，但是即使注册功能工作得很好，登录功能也会抛出“无法读取未定义的属性'computeModPow'”。

深入研究问题之后，我发现“ aws-cognito-identity-js”是主要问题。如果我尝试链接库，则捆绑程序会引发错误，表明“ aws-cognito-identity-js”已经链接，或者我无法覆盖它。

有什么建议吗？

Package.json

"react": "16.8.6",
"react-native": "0.60.4",
"aws-amplify": "^1.1.32",
"aws-amplify-react-native": "^2.1.15",

实施：

export const loginUser = (credentials: any) => async (dispatch: any) => {
  dispatch({ type: LOGIN_USER });

  try {
    const data = await Auth.signIn(credentials.email, credentials.password);
    return loginUserSuccess(dispatch, data);
  } catch (error) {
    return loginUserFail(dispatch, error);
  }
};

const loginUserSuccess = (dispatch: any, data: any) => {
  console.log({ data });
  dispatch({ type: LOGIN_USER_SUCCESS, attributes: {} });
};

const loginUserFail = (dispatch: any, error: any) => {
  console.log({ error });
  dispatch({ type: LOGIN_USER_FAILED });
};

错误：

"TypeError: Cannot read property 'computeModPow' of undefined
    at BigInteger.nativeModPow [as modPow] (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:217690:17)
    at AuthenticationHelper.calculateA (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:217990:16)
    at AuthenticationHelper.getLargeAValue (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:217928:16)
    at new AuthenticationHelper (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:217910:12)
    at CognitoUser.authenticateUserDefaultAuth (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:219720:36)
    at CognitoUser.authenticateUser (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:219710:23)
    at blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:185525:14
    at tryCallTwo (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:24791:7)
    at doResolve (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:24955:15)
    at new Promise (blob:file:///6e426a68-ddf4-48ca-86cf-ba3536cb9a13:24814:5)"

Answer 1

我遇到了同样的问题，并尝试根据https://aws-amplify.github.io/docs/js/react#add-auth运行react-native link amazon-cognito-identity-js。

然而，即使清理了构建，重新启动了打包程序等，Cannot read property 'computeModPow' of undefined错误仍然存在。

问题在于该软件包从未与react-native link amazon-cognito-identity-js正确链接。这需要我们手动链接，这很容易做到！

假设使用XCode（查找here来找到用于Android的类似过程），请转到Project Navigator，然后右键单击包含所有第三方.xcodeproj的Libraries文件夹。选择Add Files...，然后从RNAWSCognito.xcodeproj目录中添加${projectDir}/node_modules/amazon-cognito-identity-js/ios/。打开RNAWSCognito.xcodeproj和Products文件夹，并将libRNAWSCognito.a拖到“常规”选项卡下的Linked Frameworks and Libraries。重新运行该项目，应该很好。可能需要清理，重新启动打包程序等。

Answer 2

您可以通过以下操作解决此问题：

yarn add amazon-cognito-identity-js
react-native link amazon-cognito-identity-js
cd ios ; pod update ; cd ..

干杯！

Answer 3

我不知道谁需要这个，但是在我确认了amazon-cognito-identity-js之后： 1）在settings.gradle中 2）在app / build.gradle

中

我必须确保在MainApplication.java

中包含以下内容

import com.amazonaws.RNAWSCognitoPackage;

    protected List<ReactPackage> getPackages() {
        return Arrays.<ReactPackage>asList(
                // eg. new VectorIconsPackage()
                new NetInfoPackage(),
                new AsyncStoragePackage(),
                new RNAWSCognitoPackage()
        );
    }

祝你好运。

无法读取未定义的属性'computeModPow'

3 个答案: