react-native 与 mobx 抛出错误

Question

我用 mobx 实现了本机反应，但我得到了这个错误

[mobx] Encountered an uncaught exception that was thrown by a reaction or observer component, in: 'Reaction[Reaction@1] Error: [serializr] Failed to find default schema for undefined

根组件

    import React, { Component } from 'react';
import {
    View,
    AsyncStorage,
    Text,
} from 'react-native';
import { StackNavigator } from 'react-navigation';

import { observer, Provider } from 'mobx-react/native'
import { create } from 'mobx-persist'
import { AppStore,UserStore } from '../stores'
const stores = { UserStore, AppStore };

import {
    Walkthrough
} from '../screens'

const hydrate = create({
    storage: AsyncStorage
})

let Main = null;

hydrate('appStore', AppStore).then((a) => {
    console.log(a);
    AppStore.done();   
    }
)

hydrate('userStore',UserStore).then((a)=>{
    console.log(a)
    Main = StackNavigator(
        {
            Walkthrough: { screen: Walkthrough },

        }, {
            headerMode: 'none',
            lazy: true,
            initialRouteName: 'Walkthrough',
        }
    )
})



@observer
class Root extends Component {
    constructor(props){
        super(props);
        this.state = {

        }
    }


    render(){
        // const ready =  UserStore.storeHydrated &&  AppStore.storeHydrated;
        const ready = false;
        return (
            <View>
            {!ready &&  
                <View><Text>Splash screen component</Text></View>}

            </View>

        )  
    }
}

export default Root;

应用商店

    import { observable, action, computed } from 'mobx'
import { persist } from 'mobx-persist'

class AppStore {
    @observable storeHydrated = false
    @observable requesting = false

    constructor(){
        console.log("AppStore")
    }

    @action setRequesting(){
        this.requesting = !this.requesting;
    }

    @action done(){
        //this.storeHydrated = true
    }


}


const appStore = new AppStore();
export default appStore;

用户商店

    import { observable, action, computed } from 'mobx'
import { persist } from 'mobx-persist'

class UserStore {
    @persist @observable first_name;
    @persist @observable last_name;
    @persist @observable email;
    @persist @observable tasks;
    @persist @observable storeHydrated = false;
    @persist @observable alreadyRegister = false;

    constructor(){
        this.setUser = this.setUser.bind(this);
        console.log("userStore")
    }

    @action setUser(data){
        this.first_name = data.first_name
        this.last_name = data.last_name;
        this.email = data.email;
        this.tasks = data.tasks;
    }

    @action done(){
        //this.storeHydrated = true;
        // if(this.alreadyRegister){
        //     this.getUserDetails();
        // }
    }

    @action setIsFirstTimeInApp(firstTIme){
        this.firstTimeInApp = firstTIme;
    }


}


const user = new UserStore();
export default user;

我已经尝试做的是删除应用程序并再次运行，但仍然没有任何改变，它抛出同样的错误。

Answer 1

问题是

@persist @observable storeHydrated = false;

UserStore 内部不应保留，因为它是每次加载应用程序时都会重新启动的值。

因为它是持久化的，所以 true 的值在第一个运行之后保存在存储中。

所以使用：

@observable storeHydrated = false;

然后 StackNavigator Main 在您定义它之前呈现。

额外提示：

当使用 @persist @observable varName 时，你应该总是初始化一个值，甚至是 null，因为 'undefined' 的序列化不被正确支持所以它应该看起来像这样： @persist @observable varName = null（或任何适合空字符串、0、真、假等的东西）对于特殊方案，它应该是：

@persist('list') @observable varName = [] 
@persist('object') @observable varName = null
@persist('map') @observable varName = new Map()

react-native 与 mobx 抛出错误

react-native with mobx throw error

react-native

mobx

mobx-react

mobx-persist