Vue各方法求和案例

1.纯Vue求和案例

Count.vue

<template>
	<div>
		<h1>当前求和为：{{sum}}</h1>
		<select v-model.number="n">
                //将value中的n转化为数字，还可以用v-bind绑定value做到
			<option value="1">1</option>
			<option value="2">2</option>
			<option value="3">3</option>
		</select>
		<button @click="increment">+</button>
		<button @click="decrement">-</button>
		<button @click="incrementOdd">当前求和为奇数再加</button>
		<button @click="incrementWait">等一等再加</button>
	</div>
</template>

<script>
	export default {
		name:'Count',
		data() {
			return {
				n:1, //用户选择的数字
				sum:0 //当前的和
			}
		},
		methods: {
			increment(){
				this.sum += this.n
			},
			decrement(){
				this.sum -= this.n
			},
			incrementOdd(){
				if(this.sum % 2){
					this.sum += this.n
				}
			},
			incrementWait(){
				setTimeout(()=>{
					this.sum += this.n
				},500)
			},
		},
	}
</script>

<style lang="css">
	button{
		margin-left: 5px;
	}
</style>

App.vue

<template>
	<div>
		<Count/>
	</div>
</template>

<script>
	import Count from './components/Count'
	export default {
		name:'App',
		components:{Count},
	}
</script>

2.Vuex求和案例

main.js

//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//引入store
import store from './store/index'
//关闭Vue的生产提示
Vue.config.productionTip = false


//创建vm
new Vue({
	el: '#app',
	render: h => h(App),
	store
})

index.js

//该文件用于创建Vuex中最为核心的store
import Vue from 'vue'
//引入Vuex
import Vuex from 'vuex'
//应用Vuex插件
Vue.use(Vuex)
//准备actions——用于响应组件中的动作
const actions = {
    /*jia: function (context, value) {
        // console.log(context, value);
        context.commit('JIA', value)
    },
    */
    // 简写
    jian(context, value) {
        context.commit('JIAN', value)
    },
    jiaOdd: function (context, value) {
        if (context.state.sum % 2) {
            context.commit('JIA', value)
        }
    },
    // 简写
    jiaWait(context, value) {
        setTimeout(() => {
            context.commit('JIA', value)
        }, 500)
    }
}
//准备mutations——用于操作数据（state）
const mutations = {
    JIA(state, value) {
        // console.log(state, value);
        state.sum += value
    },
    JIAN(state, value) {
        state.sum -= value
    },
}
//准备state——用于存储数据
const state = {
    sum: 0, //当前的和
}
//准备getters——用于将state中的数据进行加工
const getters = {
    bigSum(state) {
        return state.sum * 10
    }
}
//创建并暴露store
export default new Vuex.Store({
    actions: actions,
    mutations: mutations,
    state: state,
    getters,
    /* 前后一致可简写
      actions,
      mutations,
      state,
  */
})

Count.vue

<template>
  <div>
    <h1>当前求和为：{{ $store.state.sum }}</h1>
    <h3>当前求和放大10倍为：{{$store.getters.bigSum}}</h3>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
export default {
  name: "Count",
  data() {
    return {
      n: 1, //用户选择的数字
    };
  },
  methods: {
    increment() {
      this.$store.commit("JIA", this.n);
    },
    // 上下两个直接加减没有业务逻辑，可以直接commit，注意对比
    decrement() {
      this.$store.dispatch("jian", this.n);
   //   this.$store.dispatch(回调函数名, 参数);

    },
    incrementOdd() {
      this.$store.dispatch("jiaOdd", this.n);
    },
    incrementWait() {
      this.$store.dispatch("jiaWait", this.n);
    },
  },
};
</script>

<style lang="css">
button {
  margin-left: 5px;
}
</style>

App.vue

<template>
	<div>
		<Count/>
	</div>
</template>

<script>
	import Count from './components/Count'
	export default {
		name:'App',
		components:{Count},
	}
</script>

3. vuex求和案例 mapState与mapGetters

Count.vue

<template>
  <div>
         //模板应尽量简洁
    <h1>当前求和为：{{ sum }}</h1>
    <h3>当前求和放大10倍为：{{ bigSum }}</h3>
    <h3>我在{{ school }}，学习{{ subject }}</h3>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
// 先从vuex导入
import { mapState, mapGetters } from "vuex";
export default {
  name: "Count",
  data() {
    return {
      n: 1, //用户选择的数字
    };
  },
  computed: {
    //靠程序员自己亲自去写计算属性
    /*      sum(){
				return this.$store.state.sum
			},
			school(){
				return this.$store.state.school
			},
			subject(){
				return this.$store.state.subject
			}, */

    //借助mapState生成计算属性，从state中读取数据。（对象写法）
    // ...mapState({计算属性函数名，'state存储的数据名'}),
    
    // ...mapState({sum:'sum',school:'school',subject:'subject'}),前后如果一致可采用数组写法
    
    //借助mapState生成计算属性，从state中读取数据。（数组写法）
    ...mapState(["sum", "school", "subject"]),

    /* ******************************************************************** */

    /*      bigSum(){
				return this.$store.getters.bigSum
			}, */

    //借助mapGetters生成计算属性，从getters中读取数据。（对象写法）
    // ...mapGetters({bigSum:'bigSum'})

    //借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
    ...mapGetters(["bigSum"]),
  },
  methods: {
    increment() {
      this.$store.commit("JIA", this.n);
    },
    decrement() {
      this.$store.commit("JIAN", this.n);
    },
    incrementOdd() {
      this.$store.dispatch("jiaOdd", this.n);
    },
    incrementWait() {
      this.$store.dispatch("jiaWait", this.n);
    },
  },
  mounted() {
    const x = mapState({ he: "sum", xuexiao: "school", xueke: "subject" });
    console.log(x);
  },
};
</script>

<style lang="css">
button {
  margin-left: 5px;
}
</style>

index.js(与上面的index.js几乎一致，就是多添加了两个属性)

//该文件用于创建Vuex中最为核心的store
import Vue from 'vue'
//引入Vuex
import Vuex from 'vuex'
//应用Vuex插件
Vue.use(Vuex)
//准备actions——用于响应组件中的动作
const actions = {
    /*jia: function (context, value) {
        // console.log(context, value);
        context.commit('JIA', value)
    },
    */
    // 简写
    jian(context, value) {
        context.commit('JIAN', value)
    },
    jiaOdd: function (context, value) {
        if (context.state.sum % 2) {
            context.commit('JIA', value)
        }
    },
    // 简写
    jiaWait(context, value) {
        setTimeout(() => {
            context.commit('JIA', value)
        }, 500)
    }
}
//准备mutations——用于操作数据（state）
const mutations = {
    JIA(state, value) {
        // console.log(state, value);
        state.sum += value
    },
    JIAN(state, value) {
        state.sum -= value
    },
}
//准备state——用于存储数据
const state = {
    sum: 0, //当前的和
    school: '尚硅谷',
    subject: '前端'
}
//准备getters——用于将state中的数据进行加工
const getters = {
    bigSum(state) {
        return state.sum * 10
    }
}
//创建并暴露store
export default new Vuex.Store({
    actions: actions,
    mutations: mutations,
    state: state,
    getters,
    /* 前后一致可简写
      actions,
      mutations,
      state,
  */
})

其余文件与上面一致

4.vuex求和案例 mapMutations与mapActions

Count.vue

注意:mapActions与mapMutations使用时，若需要传递参数需要：在模板中绑定事件时传递好参数，否则参数是事件对象。

<template>
	<div>
		<h1>当前求和为：{{sum}}</h1>
		<h3>当前求和放大10倍为：{{bigSum}}</h3>
		<h3>我在{{school}}，学习{{subject}}</h3>
		<select v-model.number="n">
			<option value="1">1</option>
			<option value="2">2</option>
			<option value="3">3</option>
		</select>
                //别忘了带参数
		<button @click="increment(n)">+</button>
		<button @click="decrement(n)">-</button>
		<button @click="incrementOdd(n)">当前求和为奇数再加</button>
		<button @click="incrementWait(n)">等一等再加</button>
	</div>
</template>

<script>
	import {mapState,mapGetters,mapMutations,mapActions} from 'vuex'
	export default {
		name:'Count',
		data() {
			return {
				n:1, //用户选择的数字
			}
		},
		computed:{
			//借助mapState生成计算属性，从state中读取数据。（对象写法）
			// ...mapState({he:'sum',xuexiao:'school',xueke:'subject'}),

			//借助mapState生成计算属性，从state中读取数据。（数组写法）
			...mapState(['sum','school','subject']),

			/* ******************************************************************** */

			//借助mapGetters生成计算属性，从getters中读取数据。（对象写法）
			// ...mapGetters({bigSum:'bigSum'})
			
			//借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
			...mapGetters(['bigSum'])

		},
		methods: {
			//程序员亲自写方法
			/* increment(){
				this.$store.commit('JIA',this.n)
			},
			decrement(){
				this.$store.commit('JIAN',this.n)
			}, */

			//借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(对象写法)
                   //注意：这里不需要带参数，参数在模板中绑定事件时放入
			...mapMutations({increment:'JIA',decrement:'JIAN'}),

			//借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(数组写法)
                  // 注意：模板中事件名与Mutations中的方法名一致时可以使用
			// ...mapMutations(['JIA','JIAN']),

			/* ************************************************* */

			//程序员亲自写方法
			/* incrementOdd(){
				this.$store.dispatch('jiaOdd',this.n)
			},
			incrementWait(){
				this.$store.dispatch('jiaWait',this.n)
			}, */

			//借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(对象写法)
			...mapActions({incrementOdd:'jiaOdd',incrementWait:'jiaWait'})

			//借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(数组写法)
			// ...mapActions(['jiaOdd','jiaWait'])
		},
		mounted() {
			const x = mapState({he:'sum',xuexiao:'school',xueke:'subject'})
			console.log(x)
		},
	}
</script>

<style lang="css">
	button{
		margin-left: 5px;
	}
</style>

其余文件与上面一致

5.求和案例_多组件共享数据

Count.vue(在计算属性中用了map方法)

<template>
	<div>
		<h1>当前求和为：{{sum}}</h1>
		<h3>当前求和放大10倍为：{{bigSum}}</h3>
		<h3>我在{{school}}，学习{{subject}}</h3>
		<h3 style="color:red">Person组件的总人数是：{{personList.length}}</h3>
		<select v-model.number="n">
			<option value="1">1</option>
			<option value="2">2</option>
			<option value="3">3</option>
		</select>
		<button @click="increment(n)">+</button>
		<button @click="decrement(n)">-</button>
		<button @click="incrementOdd(n)">当前求和为奇数再加</button>
		<button @click="incrementWait(n)">等一等再加</button>
	</div>
</template>

<script>
	import {mapState,mapGetters,mapMutations,mapActions} from 'vuex'
	export default {
		name:'Count',
		data() {
			return {
				n:1, //用户选择的数字
			}
		},
		computed:{
			//借助mapState生成计算属性，从state中读取数据。（数组写法）
			...mapState(['sum','school','subject','personList']),
			//借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
			...mapGetters(['bigSum'])
		},
		methods: {
			//借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(对象写法)
			...mapMutations({increment:'JIA',decrement:'JIAN'}),
			//借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(对象写法)
			...mapActions({incrementOdd:'jiaOdd',incrementWait:'jiaWait'})
		},
		mounted() {
			// const x = mapState({he:'sum',xuexiao:'school',xueke:'subject'})
			// console.log(x)
		},
	}
</script>

<style lang="css">
	button{
		margin-left: 5px;
	}
</style>

Person.vue（没在计算属性中用map方法，直接书写）

<template>
	<div>
		<h1>人员列表</h1>
		<h3 style="color:red">Count组件求和为：{{sum}}</h3>
		<input type="text" placeholder="请输入名字" v-model="name">
		<button @click="add">添加</button>
		<ul>
			<li v-for="p in personList" :key="p.id">{{p.name}}</li>
		</ul>
	</div>
</template>

<script>
	import {nanoid} from 'nanoid'
	export default {
		name:'Person',
		data() {
			return {
				name:''
			}
		},
		computed:{
			personList(){
				return this.$store.state.personList
			},
			sum(){
				return this.$store.state.sum
			}
		},
		methods: {
			add(){
				const personObj = {id:nanoid(),name:this.name}
				this.$store.commit('ADD_PERSON',personObj)
				this.name = ''
			}
		},
	}
</script>

index.js

//该文件用于创建Vuex中最为核心的store
import Vue from 'vue'
//引入Vuex
import Vuex from 'vuex'
//应用Vuex插件
Vue.use(Vuex)

//准备actions——用于响应组件中的动作
const actions = {
	/* jia(context,value){
		console.log('actions中的jia被调用了')
		context.commit('JIA',value)
	},
	jian(context,value){
		console.log('actions中的jian被调用了')
		context.commit('JIAN',value)
	}, */
	jiaOdd(context,value){
		console.log('actions中的jiaOdd被调用了')
		if(context.state.sum % 2){
			context.commit('JIA',value)
		}
	},
	jiaWait(context,value){
		console.log('actions中的jiaWait被调用了')
		setTimeout(()=>{
			context.commit('JIA',value)
		},500)
	}
}
//准备mutations——用于操作数据（state）
const mutations = {
	JIA(state,value){
		console.log('mutations中的JIA被调用了')
		state.sum += value
	},
	JIAN(state,value){
		console.log('mutations中的JIAN被调用了')
		state.sum -= value
	},
	ADD_PERSON(state,value){
		console.log('mutations中的ADD_PERSON被调用了')
		state.personList.unshift(value)
	}
}
//准备state——用于存储数据
const state = {
	sum:0, //当前的和
	school:'尚硅谷',
	subject:'前端',
	personList:[
		{id:'001',name:'张三'}
	]
}
//准备getters——用于将state中的数据进行加工
const getters = {
	bigSum(state){
		return state.sum*10
	}
}

//创建并暴露store
export default new Vuex.Store({
	actions,
	mutations,
	state,
	getters
})

App.vue

<template>
	<div>
		<Count/>
		<hr>
		<Person/>
	</div>
</template>

<script>
	import Count from './components/Count'
	import Person from './components/Person'

	export default {
		name:'App',
		components:{Count,Person},
		mounted() {
			// console.log('App',this)
		},
	}
</script>

main.js

//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//引入store
import store from './store/index'
//关闭Vue的生产提示
Vue.config.productionTip = false


//创建vm
new Vue({
	el: '#app',
	render: h => h(App),
	store
})

6.求和案例_模块化

Github仓库

Count.vue

<template>
  <div>
    <h1>当前求和为：{{ sum }}</h1>
    <h3>当前求和放大10倍为：{{ bigSum }}</h3>
    <h3>我在{{ school }}，学习{{ subject }}</h3>
    <h3 style="color: red">Person组件的总人数是：{{ personList.length }}</h3>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment(n)">+</button>
    <button @click="decrement(n)">-</button>
    <button @click="incrementOdd(n)">当前求和为奇数再加</button>
    <button @click="incrementWait(n)">等一等再加</button>
  </div>
</template>

<script>
import { mapState, mapGetters, mapMutations, mapActions } from "vuex";
export default {
  name: "Count",
  data() {
    return {
      n: 1, //用户选择的数字
    };
  },
  computed: {
    //借助mapState生成计算属性，从state中读取数据。（数组写法）
    ...mapState("countAbout", ["sum", "school", "subject"]),
    ...mapState("personAbout", ["personList"]),
    //借助mapGetters生成计算属性，从getters中读取数据。（数组写法）
    ...mapGetters("countAbout", ["bigSum"]),
  },
  methods: {
    //借助mapMutations生成对应的方法，方法中会调用commit去联系mutations(对象写法)
    ...mapMutations("countAbout", { increment: "JIA", decrement: "JIAN" }),
    //借助mapActions生成对应的方法，方法中会调用dispatch去联系actions(对象写法)
    ...mapActions("countAbout", {
      incrementOdd: "jiaOdd",
      incrementWait: "jiaWait",
    }),
  },
  mounted() {
    // console.log(this.$store);
  },
};
</script>

<style lang="css">
button {
  margin-left: 5px;
}
</style>

count.js

// 求和相关配置
const countOptions = {
    namespaced: true,
    // 添加命名空间
    actions: {
        jiaOdd(context, value) {
            if (context.state.sum % 2) {
                context.commit('JIA', value)
            }
        },
        jiaWait(context, value) {
            setTimeout(() => {
                context.commit('JIA', value)
            }, 500)
        }
    },
    mutations: {
        JIA(state, value) {
            state.sum += value
        },
        JIAN(state, value) {
            state.sum -= value
        },
    },
    state: {
        sum: 0,
        school: '尚硅谷',
        subject: '前端',
    },
    getters: {
        bigSum(state) {
            return state.sum * 10
        }
    },
}
export default countOptions

Person.vue

<template>
  <div>
    <h1>人员列表</h1>
    <h3 style="color: red">Count组件求和为：{{ sum }}</h3>
    <h3 style="color: red">列表中第一个人的名字是：{{ firstPersonName }}</h3>
    <input type="text" placeholder="请输入名字" v-model="name" />
    <button @click="add">添加</button>
    <button @click="addWang">添加一个姓王的人</button>
    <button @click="addServer">随机添加一个名字奇怪的人</button>
    <ul>
      <li v-for="p in personList" :key="p.id">{{ p.name }}</li>
    </ul>
  </div>
</template>

<script>
import { nanoid } from "nanoid";
export default {
  name: "Person",
  data() {
    return {
      name: "",
    };
  },
  computed: {
    personList() {
      // 这里和之前相比代码改变了
      return this.$store.state.personAbout.personList;
    },
    sum() {
      return this.$store.state.countAbout.sum;
    },
    firstPersonName() {
      return this.$store.getters["personAbout/firstPersonName"];
    },
  },
  methods: {
    add() {
      const personObj = { id: nanoid(), name: this.name };
      // 这里和之前相比代码改变了
      this.$store.commit("personAbout/ADD_PERSON", personObj);
      //   this.$store.commit("分类名/ADD_PERSON", personObj);
      this.name = "";
    },
    addWang() {
      const personObj = { id: nanoid(), name: this.name };
      this.$store.dispatch("personAbout/addPersonWang", personObj);
      this.name = "";
    },
    addServer() {
      this.$store.dispatch("personAbout/addPersonServer");
    },
  },
};
</script>

person.js

import axios from 'axios'
import { nanoid } from 'nanoid'
// 人员管理相关配置
const personOption = {
    namespaced: true,
    // 添加命名空间
    actions: {
        addPersonWang(context, value) {
            if (value.name.indexOf('王') === 0) {
                context.commit('ADD_PERSON', value)
            } else {
                alert("添加的人必须姓王")
            }
        },
        addPersonServer(context) {
            axios.get('https://api.uixsj.cn/hitokoto/get?type=social').then(
                response => {
                    context.commit('ADD_PERSON', { id: nanoid(), name: response.data })
                },
                error => {
                    alert(error.message)
                }
            )
        }
    },
    mutations: {
        ADD_PERSON(state, value) {
            state.personList.unshift(value)
        }
    },
    state: {
        personList: [
            { id: '001', name: '张三' }
        ]
    },
    getters: {
        firstPersonName(state) {
            return state.personList[0].name
        }
    },
}
export default personOption

App.vue

<template>
  <div>
    <Count />
    <hr />
    <Person />
  </div>
</template>

<script>
import Count from "./components/Count";
import Person from "./components/Person";

export default {
  name: "App",
  components: { Count, Person },
  mounted() {
    // console.log('App',this)
  },
};
</script>

index.js

//该文件用于创建Vuex中最为核心的store
import Vue from 'vue'
//引入Vuex
import Vuex from 'vuex'
//应用Vuex插件
Vue.use(Vuex)

import countOptions from './count'
import personOption from './person'
//创建并暴露store
export default new Vuex.Store({
	modules: {
		countAbout: countOptions,
		personAbout: personOption
	}
})