尝试从钥匙串(keychain)中获取保存的数据时，react-native-sensitive-info 给出 undefined

Question

感谢这个伟大的图书馆。
我在我的一个 react-native 项目中使用这个库，但是每当我试图获取存储在 keychain 中的值时，都会在 iOS 中返回 undefined 。

Here is what is my use case
1-We have an existing "Native iOS App", which is already present in AppStore to download.
2-Now my client is redeveloping the same app in React-Native, and want to provide this new app as an update to existing users.
3-So we are keeping "Bundle ID" of our new (react-native app) same as that of older app (iOS native app), with higher version number ,so that our new will be downloaded as an updated.
4-Let's suppose, an existing user is already logged in the older app, so we want to maintain this logged status , whenever user update app with newer one.
5-In older app (iOS native app), we are saving "Access Token" in keychain, so based on whether "Access Token" is present in keychain, we decide the logged in status of user
6-Now, in newer app (react-native), we have to get that same "Access Token" from keychain, so that we can decide the logged in status of user and can navigate the user to appropriate screen.

I hope that makes sense!

Now when I am using this library, and try to get "Access Token" from keychain, its returning "undefined" in iOS.

Here may be I am doing something wrong, which only you guys can figure out.
This is how I am trying to get saved "Access Token".


    SInfo.getItem("AccessToken", {}).then(value => {
     alert(value);
    console.log("access token is", value); // value1
   });

Answer 1

我面临着类似的问题，我弄清楚发生了什么，我敢打赌我们在同一条船上。

我正在使用 react-native-sensitive-info为了存储 JWT，不是像您这样简单的 key ，而是来自 reducer (redux)，因此路径是 authentication.jwt我期待按原样查询它，但它返回 undefined
经过一番调查，我发现 getItem的key，指的是你在配置store的时候给的key。

例如，我正在这样配置它:

const persistConfig = {
  key: 'root',
  transforms: [saveJwtOnly],
  whitelist: ['authentication'],
  storage
}
const persistedReducer = persistReducer(persistConfig, rootReducer)

关注 key: 'root' .现在， react-native-sensitive-info在它前面加上 persist:这样就我而言，唯一可用的 key 是 getItem就能返回是 persist:root ，它返回我存储的 authentication.jwt 的 JSON和 _persist包中的 key 。