Question

我正在尝试将商店注入我的React组件但是我收到以下错误：

Undefined不是一个函数（评估＆＃39;装饰器（目标，属性，desc）＆＃39;）

在 App.js 中，我有：

import React, { Component } from 'react';
import PoolComponent from './app/Components/PoolComponent';
import MeasurementsStore from './app/Stores/MeasurementsStore';

export default class PoolApp extends Component {

render() {
    return (
      <PoolComponent store="MeasurementsStore"/>
    );
}

}

在我的 PoolComponent.js

中

import React, { Component } from 'react';
import { observer, inject } from 'mobx-react';
import { AppRegistry, Text, View, TextInput , Picker, Button} from 'react-native';

@observer
export default class PoolComponent extends Component {
saveItems() {
    console.log('Pressed save');
}
render() {
    const store = this.props.store;
    return (
        <View>
            <Text>Selecteer Pool</Text>
            <Picker>
                <Picker.Item label="Big" value="big"/>
                <Picker.Item label="Small" value="small"/>
            </Picker>
            <Text>PH</Text>
            <TextInput/>

            <Text>Totaal Chloor</Text>
            <TextInput/>

            <Text>Vrij Chloor</Text>
            <TextInput/>
            <Button
                title="Learn More"
                color="#841584"
                accessibilityLabel="Opslaan"
                onPress={this.saveItems}
            />
        </View>
    );
}
}

在 MeasurementsStore.js 我有

import {observable, action, computed} from 'mobx-react';

export default class MeasurementsStore {
    @observable phValue = 0;
    @observable freeChlorine = 0;
    @observable totalChlorine = 0;
    @observable totalAlkalinity = 0;

    @action data(data: Object) {
        if (data.phValue) {
            this.phValue = data.phValue;
        }
        if (data.freeChlorine) {
            this.freeChlorine = data.freeChlorine;
        }
        if (data.totalChlorine) {
            this.totalChlorine = data.totalChlorine;
        }
        if (data.totalAlkalinity) {
            this.totalAlkalinity = data.totalAlkalinity;
        }
    }
}

Answer 1

在这种情况下你不需要注射。您将商店直接传递到PoolComponent，因此不需要它。但是你需要改变一些事情：

在App.js：

中传递实际商店，而不仅仅是商店名称作为字符串

import React, { Component } from 'react';
import PoolComponent from './app/Components/PoolComponent';
import measurementsStore from './app/Stores/MeasurementsStore';

export default class PoolApp extends Component {

render() {
    return (
      <PoolComponent store={measurementsStore}/>
    );
}

从mobx导入并在MeasurementsStore中导出MeasurementsStore.js的实例：

import {observable, action, computed} from 'mobx';

class MeasurementsStore {
    @observable phValue = 0;
    @observable freeChlorine = 0;
    @observable totalChlorine = 0;
    @observable totalAlkalinity = 0;

    @action data(data: Object) {
        if (data.phValue) {
            this.phValue = data.phValue;
        }
        if (data.freeChlorine) {
            this.freeChlorine = data.freeChlorine;
        }
        if (data.totalChlorine) {
            this.totalChlorine = data.totalChlorine;
        }
        if (data.totalAlkalinity) {
            this.totalAlkalinity = data.totalAlkalinity;
        }
    }
}

const measurementsStore = new MeasurementsStore();

export default measurementsStore;

在React组件中注入Store会导致Error

1 个答案: