基于VUE实现简易学生信息管理

实现以下需求： 需求1: 铺设页面, 准备初始的数据(自己手写数据结构) 需求2: 当输入框没有值, 要给用户一个提示, 必须都有值才能增加新数据 需求3: 添加功能 - 想好数据结构统一对象的key 需求4: 点击编辑功能, 把值赋予到输入框上(不要操作dom, 数据驱动页面) 需求5: 用户修改后, 点击相同按钮 - 实现编辑后更新页面效果 需求6: 点击删除, 删除这行数据

<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(obj, index) in arr" :key="obj.id">
          <td>{
          
   {
          
    index + 1 }}</td>
          <td>{
          
   {
          
    obj.name }}</td>
          <td>{
          
   {
          
    obj.age }}</td>
          <td>{
          
   {
          
    obj.gender }}</td>
          <td>
            <button @click="delFn(index)">删除</button>
            <button @click="editFn(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
          
   
  data() {
          
   
    return {
          
   
      name: "",
      age: 0,
      sex: "",
      arr: [
        {
          
    id: 1, name: "Tom", age: 19, gender: "男" },
        {
          
    id: 2, name: "Jone", age: 21, gender: "女" },
      ],
      selectIndex: "",
      flag: false,
    };
  },
  methods: {
          
   
    addFn() {
          
   
      if (this.name.length === 0 || this.age.length === 0) {
          
   
        alert("内容不能为空");
        return;
      }
      // let id = this.arr.length > 0 ? this.arr[this.arr.length - 1].id + 1 : 1;

      if (!this.flag) {
          
   
        this.arr.push({
          
   
          // id: id,
          name: this.name,
          age: this.age,
          gender: this.sex,
        });
      } else {
          
   
        this.arr.splice(this.selectIndex, 1, {
          
   
          name: this.name,
          age: this.age,
          gender: this.sex,
        });
        this.flag = false;
      }

      this.name = "";
      this.age = 0;
      this.sex = "";
    },
    editFn(i) {
          
   
      this.name = this.arr[i].name;
      this.age = this.arr[i].age;
      this.sex = this.arr[i].gender;
      this.selectIndex = this.arr.findIndex((obj) => obj.id === i + 1);
      this.flag = true;
    },
    delFn(ind) {
          
   
      this.arr.splice(ind, 1);
    },
  },
};
</script>