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wepy-redux

v1.5.9

Published

WePY bindings for Redux

Downloads

74

Readme

wepy 和 redux 结合的连接器

安装

npm install wepy-redux --save

示例

<template>
  <view class="container">
    <text class="info">{{num}}</text>
    <text class="info">{{inc}}</text>
    <button @tap="addNum" size="mini">  + num  </button>
    <button @tap="asyncInc" size="mini">  async inc </button>
  </view>
</template>

<script>
  import wepy from 'wepy'
  import { connect } from 'wepy-redux'
  import List from '../components/list'
  import Panel from '../components/panel'
  import Counter from '../components/counter'
  import Group from '../components/group'
  import Toast from 'wepy-com-toast'
  import { INCREMENT } from '../store/types/counter'
  import { asyncInc } from '../store/actions'
  import testMixin from '../mixins/test'

  @connect({
    num(state) {
      return state.counter.num
    },
    inc: 'inc'
  }, {
    addNum: INCREMENT,
    asyncInc
  })
  export default class Index extends wepy.page {
  	// ...
    methods = {
      // ...
    }
    // ...
    onLoad() {
    }
  }
</script>

使用

  1. 初始化 store
// app.wpy
import { createStore } from 'redux'
import { setStore } from 'wepy-redux'
import rootReducer from './reducers'

const store = createStore(rootReducer)
// set!!
setStore(store)
  1. 得到 store
import { getStore } from 'wepy-redux'

const store = getStore()
// 可以直接使用 store 实例了
// dispatch
store.dispatch({type: 'xx'})
// state
const state = store.getState()
  1. 连接组件,就以上边的示例来说明
// ...
  import { connect } from 'wepy-redux'
  @connect({
    num(state) {
      return state.counter.num
    },
    inc: 'inc'
  }, {
    addNum: INCREMENT,
    asyncInc
  })
  export default class Index extends wepy.page {
  	// ...
    methods = {
      // ...
    }
    // ...
    onLoad() {
    }
  }

这里主要涉及到 connect 的用法: connect(states, actions),这里解释下:

  • states: 访问 state 上的值,可以是数组或者对象,如果是对象的话,则包含的是 K-V 对,V 可以是函数还可以是字符串,如果是字符串的话则默认获取 state[V], 否则的话则是使用返回值;而对于如果是数组的话(数组中的项只能为字符串),则认为是相同的 K-V 对象结构。states 最终会附加到组件的 computed 属性值上。

  • actions: 只能传入对象,对象的 K-V 结构,如果 V 是字符串的话,则直接会 distatch 如下的结构:

    // args 就是调用传入参数
    {
    	type: val,
    	// 修正一般情况下的参数 一般支持只传一个参数
    	// 如果真的是多个参数的话 那么 payload 就是参数组成的数组
    	payload: args.length > 1 ? args : args[0]
    }

    如果是一个函数 fn,则会 dispatch(val.apply(store, args)),否则的话则直接 dispatch(V)