<template>
 <div id="app">
 <!--第一部分-->
 <fieldset>
  <legend>学生录入系统</legend>
  <div>
  <span>姓名:</span>
  <input type="text" placeholder="请输入姓名" v-model="newStudent.name">
  </div>
  <div>
  <span>年龄:</span>
  <input type="text" placeholder="请输入年龄" v-model="newStudent.age">
  </div>
  <div>
  <span>性别:</span>
  <select v-model="newStudent.sex">
   <option value="男">男</option>
   <option value="女">女</option>
  </select>
  </div>
  <div>
  <span>手机:</span>
  <input type="text" placeholder="请输入手机号码" v-model="newStudent.phone">
  </div>
  <button @click="createNewStudent()">创建新用户</button>
 </fieldset>
 <!--第二部分-->
 <table>
  <thead>
  <tr>
  <td>姓名</td>
  <td>性别</td>
  <td>年龄</td>
  <td>手机</td>
  <td>删除</td>
  </tr>
  </thead>
  <tbody>
  <tr v-for="(p, index) in persons">
  <td>{{p.name}}</td>
  <td>{{p.sex}}</td>
  <td>{{p.age}}</td>
  <td>{{p.phone}}</td>
  <td>
   <button @click="deleteStudentMsg(index)">删除</button>
  </td>
  </tr>
  </tbody>
 </table>
 </div>
</template>
 
<script>
 export default {
  name: "todolist2",
  data(){
   return{
   persons: [
    {name: '张三', age: 20, sex: '男', phone: '18932323232'},
    {name: '李四', age: 30, sex: '男', phone: '18921212122'},
    {name: '王五', age: 20, sex: '男', phone: '18932223232'},
    {name: '赵六', age: 25, sex: '女', phone: '18932322232'},
   ],
   newStudent: {name: '', age: 0, sex: '男', phone: ''}
   }
  },
  methods: {
  // 创建一条新纪录
  createNewStudent(){
   // 姓名不能为空
   if(this.newStudent.name === ''){
   alert('姓名不能为空');
   return;
   }
 
   // 年龄不能小于0
   if(this.newStudent.age <= 0){
   alert('请输入正确的年龄');
   return;
   }
 
   // 手机号码
   if(this.newStudent.phone === ''){
   alert('手机号码不正确');
   return;
   }
 
   // 往数组中添加一条新纪录
   this.persons.unshift(this.newStudent);
   // 清空数据
   this.newStudent = {name: '', age: 0, sex: '男', phone: ''}
  },
 
  // 删除一条学生纪录
  deleteStudentMsg(index){
   this.persons.splice(index,1);
  }
  },
 }
</script>
 
<style scoped>
 #app{
 margin: 50px auto;
 width: 600px;
 }
 
 fieldset{
 border: 1px solid orangered;
 margin-bottom: 20px;
 }
 
 fieldset input{
 width: 200px;
 height: 30px;
 margin: 10px 0;
 }
 
 table{
 width: 600px;
 border: 2px solid orangered;
 text-align: center;
 }
 
 thead{
 background-color: orangered;
 }
</style>