2018-09-12 vue第二课(v-model(双向数据绑定

2018-09-13  本文已影响0人  LYH2312

1.v-model(双向数据绑定)=>主要用于表单元素

<div id="id">
        百度<input v-model="msg"></input>
        <P>小度{{msg}}</P>
    </div>
    <script src="vue.js"></script>
    <script>
        new Vue({
            el:'#id',
            data:{
                msg:''//双向数据绑定,可为空值
            }
        })
    </script>

2.v-on绑定事件

v-on:事件=“函数名”
methods:{//存放函数(是一个方法)}

<div id='itany'>
    <button v-on:click='alt'>点击</button>
    <p>{{msg}}</p>
</div>


    <script src="vue.js"></script>
    <script>
        var vm=new Vue({
            el:'#itany',
            data:{
                msg:'hello vue',
                mas:'HELLO WORD'
            },
            methods:{//存放函数(方法)
                alt:function(){
//                  console.log(this.msg)
                    console.log(vm.msg)//打印
                    this.msg=this.mas
                }
            }
        })

    </script>

3.添加和删除

push()给数组末尾添加新元素;

pop()始终删除数组最后一个元素;

unshift()给数组开头添加一个元素;

shift()始终删除数组开头的元素;

splice()从数组中删除元素;

splice(index,n)=>(下标,个数)

     <div id="new">
        <input v-model="a">
        <button v-on:click="fun">添加</button>
        <ul>
            <Li v-for="(val,index) in arr">{{val}}<button v-on:click="fun1(index)">删除</button></Li>
        </ul>
    </div>
    <script src="vue.js"></script>


<script>
    new Vue({
        el:"#new",
        data:{
            arr:["啥","玩","意"],
            a:""

        },
        methods:{
            fun:function(){
            this.arr.push(this.a)
            },
            fun1:function(ind){
                this.arr.splice(ind,1)
            }
        }
    })
</script>

4.添加删除用户

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .form-group{
            margin: 0 auto;
            margin-top: 20px;
            text-align: center;
        }
        .form-group input {
            width: 800px;
            height: 50px;
        }
        .btn-success{
            margin-top: 20px;
            margin-left:400px ;
            width: 100px;
            height: 60px;
            border-radius:5px ;
        }
        .btn-new{
            margin-top: 20px;
            margin-left:400px ;
            width: 100px;
            height: 60px;
            border-radius:5px ;
        }
        .table-bordered{
            margin-left: 600px;
            text-align: center;
        }
        .border{
            width: 400px;
            height: 200px;
        }
    </style>
</head>

<body>
<script src="vue.js"></script>

    <div id="app">
                     <div class="form-group">
                         <label for="group">姓名</label>
                         <input type="text" placeholder="你的姓名" v-model="person1.name">
                    </div>
                     <div class="form-group">
                         <label for="author">年龄</label>
                         <input type="text"  placeholder="你的年龄" v-model="person1.num">
                     </div>
                     <div class="form-group">
                         <label for="price">邮箱</label>
                         <input type="text" placeholder="你的邮箱"  v-model="person1.score">
                     </div>
                        <button class="btn btn-success" v-on:click="addPerson()">添加</button>
                         <button class="btn btn-new" ><a href="">重置</a></button>
                    <table class="table table-bordered" border="1">
                         <thead class="border">
                             <tr>
                                 <th>编号</th>
                                 <th>姓名</th>
                                 <th>年龄</th>
                                 <th>邮箱</th>
                                 <th>操作</th>
                           </tr>
                         </thead>
                        <tbody>
                            <tr  v-for="(person,index) in people">
                                <td>{{index+1}}</td>
                                <td>{{person.name}}</td>
                                <td>{{person.num}}</td>
                                <td>{{person.score}}</td>
                                <td><buton  class="btn btn-warning" @click="delPerson(person)">删除</buton></td>
                            </tr>
                         </tbody>
                     </table>
                 </div>


<script>
             var vm=new Vue({
                 el:'#app',
                       data:{
                         person1:{

                                   name: '',
                                          num: '',
                                          score: ''
                            },
                      people:[{
                                name: '张三',
                                   num: '12',
                                    score: 'tom@126.com'
                       },
                         {
                                 name: '李四',
                                     num: '15',
                                       score: 'tom@126.com7'
                         },
                         {
                                name: '王二',
                        num: '18',
                                        score: 'tom@126.com'
                           },
                         ]
                    },
                //在methods中定义方法
               methods:{
                        //新增成员信息
                       addPerson: function () {
                                  this.person1.id=this.people.length+1;
                               this.people.push(this.person1);
                               this.person1={};
                            },
                        //删除成员信息
                     delPerson: function(person){
                                this.people.splice(this.people.indexOf(person),1);
                            }
                     }
            })

</script>
</body>
</html>
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