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* feat(mobx): 引入mobx * feat(mobx): 构建&编译支持mobx * feat(mobx): 文档 * feat(mobx): 解决支付宝小程序全局window或global不存在的问题 * feat(mobx)：h5 & RN componentWillUnmount调用时停止监听 * feat(mobx): 版本号与主库保持一致 * feat(mobx): 版本号与主库保持一致（1.1.7） * feat(mobx): 构建问题修复
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,190 @@ | ||
| --- | ||
| title: 使用 Mobx | ||
| --- | ||
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| [Mobx](https://mobx.js.org/) 为复杂项目中状态管理提供了一种简单高效的机制；Taro 提供了 `@tarojs/mobx` 来让开发人员在使用Mobx的过程中获得更加良好的开发体验。 | ||
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| > 下文中示例代码均在 [taro-mobx-sample](https://github.com/nanjingboy/taro-mobx-sample) | ||
| 首先请安装 `mobx` 、 `@tarojs/mobx` 、 `@tarojs/mobx-h5` 和 `@tarojs/mobx-rn` | ||
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| ```bash | ||
| $ yarn add mobx @tarojs/mobx @tarojs/mobx-h5 @tarojs/mobx-rn | ||
| # 或者使用 npm | ||
| $ npm install --save mobx @tarojs/mobx @tarojs/mobx-h5 @tarojs/mobx-rn | ||
| ``` | ||
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| 随后可以在项目 `src` 目录下新增一个 `store/counter.js` 文件 | ||
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| ```jsx | ||
| // src/store/counter.js | ||
| import { observable } from 'mobx' | ||
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| const counterStore = observable({ | ||
| counter: 0 | ||
| }) | ||
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| counterStore.increment = function () { | ||
| this.counter++ | ||
| } | ||
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| counterStore.decrement = function() { | ||
| this.counter-- | ||
| } | ||
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| counterStore.incrementAsync = function() { | ||
| setTimeout(() => { | ||
| this.counter++ | ||
| }, 1000); | ||
| } | ||
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| export default counterStore | ||
| ``` | ||
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| 接下来在项目入口文件 `app.js` 中使用 `@tarojs/mobx` 中提供的 `Provider` 组件将前面写好的 `store` 接入应用中 | ||
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| ```jsx | ||
| // src/app.jsimport Taro, { Component } from '@tarojs/taro' | ||
| import { Provider } from '@tarojs/mobx' | ||
| import Index from './pages/index' | ||
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| import counterStore from './store/counter' | ||
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| import './app.scss' | ||
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| const store = { | ||
| counterStore | ||
| } | ||
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| class App extends Component { | ||
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| config = { | ||
| pages: [ | ||
| 'pages/index/index' | ||
| ], | ||
| window: { | ||
| backgroundTextStyle: 'light', | ||
| navigationBarBackgroundColor: '#fff', | ||
| navigationBarTitleText: 'WeChat', | ||
| navigationBarTextStyle: 'black' | ||
| } | ||
| } | ||
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| componentDidMount () {} | ||
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| componentDidShow () {} | ||
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| componentDidHide () {} | ||
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| componentDidCatchError () {} | ||
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| render () { | ||
| return ( | ||
| <Provider store={store}> | ||
| <Index /> | ||
| </Provider> | ||
| ) | ||
| } | ||
| } | ||
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| Taro.render(<App />, document.getElementById('app')) | ||
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| ``` | ||
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| 然后，我们在页面中可通过 `@tarojs/mobx` 提供的 `inject` 以及 `observer` 方法将 `mobx` 与我们的页面进行关联 | ||
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| ```jsx | ||
| // src/pages/index/index.js | ||
| import Taro, { Component } from '@tarojs/taro' | ||
| import { View, Button, Text } from '@tarojs/components' | ||
| import { observer, inject } from '@tarojs/mobx' | ||
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| import './index.scss' | ||
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| @inject('counterStore') | ||
| @observer | ||
| class Index extends Component { | ||
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| config = { | ||
| navigationBarTitleText: '首页' | ||
| } | ||
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| componentWillMount () { } | ||
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| componentWillReact () { | ||
| console.log('componentWillRect') | ||
| } | ||
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| componentDidMount () { } | ||
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| componentWillUnmount () { } | ||
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| componentDidShow () { } | ||
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| componentDidHide () { } | ||
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| increment = () => { | ||
| const { counterStore } = this.props | ||
| counterStore.increment() | ||
| } | ||
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| decrement = () => { | ||
| const { counterStore } = this.props | ||
| counterStore.decrement() | ||
| } | ||
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| incrementAsync = () => { | ||
| const { counterStore } = this.props | ||
| counterStore.incrementAsync() | ||
| } | ||
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| render () { | ||
| const { counterStore } = this.props | ||
| return ( | ||
| <View className='index'> | ||
| <Button onClick={this.increment}>+</Button> | ||
| <Button onClick={this.decrement}>-</Button> | ||
| <Button onClick={this.incrementAsync}>Add Async</Button> | ||
| <Text>{counterStore.counter}</Text> | ||
| </View> | ||
| ) | ||
| } | ||
| } | ||
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| export default Index | ||
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| ``` | ||
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| 上例中 `Provider`、`inject`、 `observer`的使用方式基本上与[mobx-react](https://github.com/mobxjs/mobx-react) 保持了一致，但也有以下几点需要注意： | ||
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| * `Provider`不支持嵌套，即全局只能存在一个`Provider` | ||
| * 在 `mobx-react`中，可通过以下方式设置`store`： | ||
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| ```jsx | ||
| <Provider store1={xxxx} store2={xxxx}> | ||
| <XXX /> | ||
| </Provider> | ||
| ``` | ||
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| 而在`@tarojs/mobx`中，我们需要使用以下方式设置： | ||
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| ```jsx | ||
| const store = { | ||
| store1: xxxx, | ||
| store2: xxxx | ||
| } | ||
| <Provider store={store}> | ||
| <XXX /> | ||
| </Provider> | ||
| ``` | ||
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| * `inject`、 `observer` 不能在stateless组件上使用 | ||
| * `observer` 不支持任何参数 | ||
| * 按照以下方式使用 `inject` 时，不能省略`observer`的显式调用： | ||
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| ```jsx | ||
| @inject((stores, props) => ({ | ||
| counterStore: stores.counterStore | ||
| })) | ||
| @observer //这个不能省略 | ||
| ``` |
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