vue学习(六)项目基础(3)-Vuex

╰半橙微兮° 2023-06-17 15:58 1阅读 0赞

Vuex

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 1][]

单页面状态管理

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 3][]

多界面状态管理

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 4][]

App.vue

<template>
      <div id="app">
        <h2>{
       {$store.state.counter}}</h2>
        <button @click = "$store.state.counter++">+</button>
        <button @click = "$store.state.counter--">-</button>
        <hello-world/>
      </div>
    </template>
    
    <script>
    import HelloWorld from './components/HelloWorld'
    export default {
      name: 'App',
      data(){
        return{
          message: '我是APP组件',
        }
      },
      components:{
        HelloWorld
      }
    }
    </script>
    
    <style>
    
    </style>

store/index.js

import Vue from 'vue'
    import Vuex from 'vuex'
    
    Vue.use(Vuex)
    
    const store = new Vuex.Store({
        state:{
            counter: 1000
        },
        mutations:{
    
        },
        actions:{
    
        },
        getters:{
    
        },
        modules:{
    
        }
    })
    
    export default store

main.js

import Vue from 'vue'
    import App from './App'
    import router from './router'
    import store from './store'
    
    Vue.config.productionTip = false
    
    
    /* eslint-disable no-new */
    new Vue({
      el: '#app',
      router,
      store,
      render: h => h(App)
    })

HelloWorld.vue

<template>
      <div class="hello-world">
          <h2>{
       {$store.state.counter}}</h2>
      </div>
    </template>
    
    <script>
    export default {
      name: 'HelloWorld',
      data() { 
        return {
    
        }
      }
     }
    </script>
    
    <style lang="" scoped>
    </style>

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 5][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 7][]

Vuex 单一状态树

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 8][]

Getters

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 10][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 11][]

store/index.js

import Vue from 'vue'
    import Vuex from 'vuex'
    
    Vue.use(Vuex)
    
    const store = new Vuex.Store({
        state:{
            counter: 1000,
            students:[
                {id:110, name:'why', age:18},
                {id:111, name:'kobe', age:24},
                {id:112, name:'james', age:30},
                {id:113, name:'curry', age:8},
            ]
        },
        mutations:{
            //方法
            increment(state){
                state.counter++
            },
            decrement(state){
                state.counter--
            }
        },
        actions:{
    
        },
        getters:{
            powerCounter(state){
                return state.counter * state.counter
            },
            more20stu(state){
                return state.students.filter(s => s.age >= 20)
            },
            more20stuLength(state, getters){
                return getters.more20stu.length
            },
            moreAgeStu(state){
                // return function(age){
                //     return state.students.filter(s => s.age >= age)
                // }
                return age =>{
                    return state.students.filter(s => s.age > age)
                }
            }
        },
        modules:{
    
        }
    })
    
    export default store

App.vue

<template>
      <div id="app">
        <h2>--------App内容----------</h2>
        <h2>{
       {$store.state.counter}}</h2>
        <button @click = "addition">+</button>
        <button @click = "subtraction">-</button>
        
    
        <h2>--------App内容:getters相关信息----------</h2>
        <h2>{
       {$store.getters.powerCounter}}</h2>
        <h2>{
       {$store.getters.more20stu}}</h2>
        <h2>{
       {$store.getters.more20stuLength}}</h2>
        <h2>{
       {$store.getters.moreAgeStu(20)}}</h2>
        <h2>--------Hello Vuex 内容----------</h2>
        <hello-world/>
      </div>
    </template>
    
    <script>
    import HelloWorld from './components/HelloWorld'
    export default {
      name: 'App',
      data(){
        return{
          message: '我是APP组件',
        }
      },
      components:{
        HelloWorld
      },
      computed:{
        more20stu(){
            return this.$store.state.students.filter(s => s.age >= 20)
        }
      },
      methods:{
        addition(){
       {
          this.$store.commit('increment')
        }},
        subtraction(){
       {
          this.$store.commit('decrement')
        }}
      }
    }
    </script>
    
    <style>
    
    </style>

Mutation状态更新

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 12][]

Mutation 传递参数

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 13][]

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Mutation 响应规则

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 16][]

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Mutation 的同步函数

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 18][]

Mutation 常量类型

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 19][]

Action

![20191129222010813.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 20][]

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 22][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 23][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 24][]

Modules

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 26][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 27][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 28][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 29][]

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项目结构

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXhpbnU_size_16_color_FFFFFF_t_70 31][]

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[20191129222010813.png]: https://img-blog.csdnimg.cn/20191129222010813.png
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