Vue-40、Vue中TodoList案例

1、MyHeader.vue

<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add">
    </div>
</template>

<script>
    import {nanoid} from 'nanoid'
    export default {
        name: "MyHeader",
        props:['addTodo'],
        data(){
            return{
                title:''
            }
        },
        methods:{
            add(){
                if(!this.title.trim())  alert("输入不能为零") ;
                const obj = {id:nanoid(),title: this.title,done:false};
                this.addTodo(obj);
                this.title=''
            },
        }
    }
</script>

<style scoped>
    /*header*/
    .todo-header input {
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }
    .todo-header input:focus {
        outline: none;
        border-color: rgba(82, 168, 236, 0.8);
        box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
    }
</style>

2、MyList.vue

<template>
    <ul class="todo-main">
        <my-item v-for="todobj in todos" :key="todobj.id"  :todo="todobj" :changeDone="changeDone" :deleteToto="deleteToto"></my-item>
    </ul>
</template>
<script>
    import MyItem from './MyItem'
    export default {
        name: "MyList",
        components:{
            MyItem
        },
        props:['todos','changeDone','deleteToto'],
        computed:{

        }
    }
</script>

<style scoped>
    /*main*/
    .todo-main {
        margin-left: 0px;
        border: 1px solid #ddd;
        border-radius: 2px;
        padding: 0px;
    }

    .todo-empty {
        height: 40px;
        line-height: 40px;
        border: 1px solid #ddd;
        border-radius: 2px;
        padding-left: 5px;
        margin-top: 10px;
    }
</style>

3、MyItem.vue

<template>
    <li>
        <label>
            <input type="checkbox" :checked="todo.done" @change="changecheckItem(todo.id)"/>
            <span>{{todo.title}}</span>
        </label>
        <button class="btn btn-danger" @click="removeTodo(todo.id)">删除</button>
    </li>
</template>
<script>
    export default {
        name: "MyItem",
        props:['todo','changeDone','deleteToto'],
        data(){
            return{

            }
        },
        methods:{
            changecheckItem(id){
                this.changeDone(id);
            },
            removeTodo(id){
                if(confirm('是否删除')){
                    this.deleteToto(id);
                }
            }
        }
    }
</script>

<style scoped>
    /*item*/
    li {
        list-style: none;
        height: 36px;
        line-height: 36px;
        padding: 0 5px;
        border-bottom: 1px solid #ddd;
    }

    li label {
        float: left;
        cursor: pointer;
    }

    li label li input {
        vertical-align: middle;
        margin-right: 6px;
        position: relative;
        top: -1px;
    }

    li button {
        float: right;
        display: none;
        margin-top: 3px;
    }

    li:before {
        content: initial;
    }

    li:last-child {
        border-bottom: none;
    }
    li:hover button{
        display: block;
    }
</style>

4、MyFoot.vue

<template>
    <div class="todo-footer"  v-show="total" >
        <label>
            <input type="checkbox"  v-model="isAll" >
        </label>
        <span>
            <span>已完成{{totalDone}}</span> / 全部{{todos.length}}
        </span>
        <button class="btn btn-danger"  @click="removeTodoDone">清除已完成任务</button>
    </div>
</template>
<script >
    export default {
        name: "MyFooter",
        props:['todos','changeTodoDones','clearTodoDone'],
        computed:{
            total(){
                const  a = this.todos.length;
                return a>0 ? true : false;
            },
            totalDone(){
                const number = this.todos.reduce((pre,todo)=> pre + (todo.done ? 1 : 0),0);
                return number;
            },
            isAll:{
                get(){
                    return this.totalDone === this.todos.length && this.todos.length > 0;
                },
                set(value){
                    this.changeTodoDones(value);
                }
            },
        },
        methods:{
            removeTodoDone(){
                this.clearTodoDone();
            }
        }
    }
</script>

<style scoped>
    /*footer*/
    .todo-footer {
        height: 40px;
        line-height: 40px;
        padding-left: 6px;
        margin-top: 5px;
    }

    .todo-footer label {
        display: inline-block;
        margin-right: 20px;
        cursor: pointer;

    }

    .todo-footer label input {
        position: relative;
        top: -1px;
        vertical-align: middle;
        margin-right: 5px;
    }

    .todo-footer button {
        float: right;
        margin-top: 5px;
    }
</style>

5、App.vue

<template>
  <div id="app">
    <div class="todo-container">
      <div class="todo-wrap">
            <my-header :addTodo="addTodo"></my-header>
            <my-list :todos="todos" :changeDone="changeDone" :deleteToto="deleteToto"></my-list>
            <my-footer :todos="todos" :changeTodoDones="changeTodoDones" :clearTodoDone="clearTodoDone"></my-footer>
      </div>
    </div>
  </div>
</template>
<script>
import  MyHeader from './components/MyHeader'
import  MyFooter from './components/MyFooter'
import  MyList from './components/MyList'

export default {
  name: 'App',
  components: {
    MyHeader,MyList,MyFooter
  },
    data(){
      return{
          todos:[
              {id:'001',title:'吃饭',done:true},
              {id:'002',title:'睡觉',done:false},
              {id:'003',title:'喝酒',done:true}
          ]
      }
    },
    methods:{
      addTodo(obj){
          this.todos.unshift(obj);
      },
        changeDone(id){
          this.todos.forEach((p)=>{
              if(p.id === id){
                  p.done = !p.done
              }
          })
        },
        deleteToto(id){
          this.todos=
          this.todos.filter(p=>p.id !== id);
        },
        changeTodoDones(value){
          this.todos.forEach(p=>{
              p.done=value;
          });
        },
        clearTodoDone(){
         this.todos=this.todos.filter(p=>{
              return !p.done
          })
        }
    }
}
</script>
<style >
  /*base*/
  body {
    background: #fff;
  }

  .btn {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 0;
    font-size: 14px;
    line-height: 20px;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
  }
  .btn-danger {
    color: #fff;
    background-color: #da4f49;
    border: 1px solid #bd362f;
  }

  .btn-danger:hover {
    color: #fff;
    background-color: #bd362f;
  }
  .btn:focus {
    outline: none;
  }
  .todo-container {
    width: 600px;
    margin: 0 auto;
  }
  .todo-container .todo-wrap {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
</style>

6、main.js

//该文件是整个项目的入口文件
//引入Vue
import Vue from 'vue'
//引入APP组件，他是所有组件的父组件
import App from './App.vue'

//关闭Vue是生产提示
Vue.config.productionTip = false;
//应用插件

//创建Vue实例对象---vm
new Vue({
  render: h => h(App),
}).$mount('#app');

7、总结