Question

我在用mobx / mobx-react-lite挣扎并做出反应。

我想从一个类中更新一个商店中的属性，但是以某种方式我无法使它工作。以下是一些示例，这些示例说明了如何合并我的商店，以及我想从中调用我的商店的组件和类。我正在使用Context从react获取要存储在我的钩子组件中，并且效果很好。

// FooStore

import { observable, action } from "mobx";
import ExampleClass from "app/services/exampleClass";

export class FooStore {
    @observable
    public foo: string = "";

    @action
    public doSomething() {
        this.foo = ExampleClass.doSomething()
    }
}

export default FooStore;

// BarStore

import { observable, action } from "mobx";

export class BarStore {
    @observable
    public bar: number = 0;

    @action
    public setBar(value: number) {
        this.bar
    }
}

export default BarStore;

// Store（将商店合并为一个，并使用createContext（）导出）

import { FooStore } from "./FooStore";
import { BarStore } from "./BarStore";
import { createContext } from "react";

class Store {
    public fooStore: FooStore;
    public barStore: BarStore;
    constructor(){
        this.fooStore = new FooStore();
        this.barStore = new BarStore();
    }
}

const stores = new Store()

export default createContext(stores);

这是我希望能够调用我的barStore的类。（注意，不是组件类）

// ExampleClass

export default class ExampleClass {
    public static doSomething(): string {
        // ...

        // Call BarStore.setBar(1000)

        return "Some string"
    }
}

有人可以为此推我正确的方向吗？

Answer 1

上下文是一个React概念。通过Context导出商店是不好的。（可能是您应该需要在其他环境中使用它！）您应该导出存储本身，并通过上下文将其包装在最高级别的组件中。

//您的商店：

DELETE FROM STATE;
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('AL','Alabama ');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('AK','Alaska');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('AZ','Arizona');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('AR','Arkansas');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('CA','California');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('CO','Colorado');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('CT','Connecticut');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('DE','Delaware');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('FL','Florida');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('GA','Georgia');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('HI','Hawaii');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('ID','Idaho');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('IL','Illinois');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('IN','Indiana');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('IA','Iowa');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('KS','Kansas');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('KY','Kentucky');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('LA','Louisiana');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('ME','Maine');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MD','Maryland');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MA','Massachusetts');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MI','Michigan');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MN','Minnesota');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MS','Mississippi');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MO','Missouri');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('MT','Montana');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NE','Nebraska');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NV','Nevada');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NH','New Hampshire');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NJ','New Jersey');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NM','New Mexico');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NY','New York');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('NC','North Carolina');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('ND','North Dakota');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('OH','Ohio');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('OK','Oklahoma');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('OR','Oregon');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('PA','Pennsylvania');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('RI','Rhode Island');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('SC','South Carolina');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('SD','South Dakota');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('TN','Tennessee');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('TX','Texas');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('UT','Utah');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('VT','Vermont');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('VA','Virginia');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('WA','Washington');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('WV','West Virginia');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('WI','Wisconsin');
INSERT INTO STATE (STATE_CD,STATE_NAME) VALUES ('WY','Wyoming');
COMMIT;

// App.js ...

import { FooStore } from "./FooStore";
import { BarStore } from "./BarStore";

class Store {
    public fooStore: FooStore;
    public barStore: BarStore;
    constructor(){
        this.fooStore = new FooStore();
        this.barStore = new BarStore();
    }
}

const stores = new Store()

export default stores;

//其他任何js文件

import store from './yourStore';
import { createContext } from "react";

const GlobalStore = createContext(store);

export default () => {
    <GlobalStore.Provider>
       <Main />
    </GlobalStore.Provider>
}

使用mobX从类访问存储并作出反应

1 个答案: