<input type="text" v-model="thing">

<!-- 等同于 -->
<input type="text" v-bind:value="thing" 
       v-on:input="thing = $event.target.value">

<!-- reply.vue -->
<template>
  <div>
    <li>
      <div v-if="data.id != 0" @click="getfid(data.id)" :id="data.id"> {{ data.name }}</div>
      <ul v-if="data.children && data.children.length > 0">
        <Reply v-for="child in data.children" :key="child.id" :data="child"/>
      </ul>
    </li>
  </div>
</template>

<script>

  import bus from './bus.js';

  export default {

    //聲明名稱
    name: "Reply",
    props: ['data'],
    //聲明組件
    components: {},
    //聲明變量
    data() {
      return {
        fid: 0,
      }
    },
    //自定義過濾器
    filters: {
      myfilter: function (value) {
        value = value.slice(0, 3);
        return value + "********";
      }
    },
    //初始化方法
    mounted() {
    },
    //聲明方法
    methods: {
      //點選分類id
      getfid: function (fid) {
        this.fid = fid;
        //console.log(this.fid);
        bus.$emit("msg", fid);
        localStorage.setItem("fid", this.fid);

        //取消所有高亮
        var divs = document.getElementsByClassName("bg");

        //遍歷選擇器
        for (var i = divs.length - 1; i >= 0; i--) {

          //取消高亮
          divs[i].classList.remove("bg");

        }
        //首先將當前元素高亮顯示
        var mydiv = document.getElementById(fid);
        //動態(tài)添加高亮類選擇器
        mydiv.classList.add("bg");
      }
    }
  }
</script>


<style>

  ul {
    padding-left: 10rem;
    list-style: none;
  }

  .bg {
    background: orange;
    color: white;
  }
</style>

<!--bus.js-->
import Vue from 'vue'

export default new Vue();

<template>
  <div>
    <heads></heads>
    <h1>課程提交頁面</h1>
    <reply :data="mydata"/>
    <van-cell-group>
      <van-field label="課程標題" v-model="title"/>
      <van-field label="課程描述" v-model="desc" rows="5" type="textarea"/>
      <van-field label="課程價格" v-model="price"/>

      <div v-for="(value,key,index) in params">
        <van-field :label="key" v-model="info[key]"/>
      </div>

      <van-button color="gray" @click="addcourse">保存課程</van-button>
    </van-cell-group>
  </div>
</template>

<script>

  //導入其他組件
  import bus from './bus.js';
  import reply from "./reply";
  import heads from "./heads";


  export default {

    //聲明組件
    components: {
      'reply': reply,
      'heads': heads,
    },
    //構造方法
    created() {
      //監(jiān)聽
      bus.$on('msg', target => {
        console.log(target);
        this.fid = target;
        if (this.cid === 0) {
          this.get_cate(this.fid)
        } else {
          this.$toast.fail("您已經保存過課程了,無法再次選擇分類");
          return false;
        }
      });
    },
    //聲明變量
    data() {
      return {
        //數據
        mydata: {},
        //課程分類id
        fid: localStorage.getItem("fid"),
        title: "",
        price: "",
        desc: "",
        cid: 0,
        videos: [],
        videosrc: "",
        params: {},
        info: {}
      }
    },
    //初始化方法
    mounted() {
      this.get_data();
    },
    //聲明方法
    methods: {
      get_cate(fid) {
        this.axios.get('http://localhost:5000/getcate/', {params: {'fid': fid}}).then(result => {
          var myparams = result.data.params;
          if (myparams === '') {
            myparams = null
          }
          myparams = JSON.parse(myparams)
          this.params = myparams

          for (var key in this.params) {
            this.$set(this.info, key, '')
          }
          console.log(this.info)
        })
      },
      //添加課程
      addcourse: function () {
        var lists = [];
        for (var key in this.info) {
          lists.push({'key': key, 'value': this.info[key], 'label': this.params[key]})
        }

        var list_str = JSON.stringify(lists)

        var data_post = {
          fid: this.fid,
          title: this.title,
          desc: this.desc,
          price: this.price,
          id: localStorage.getItem("user_id"),
        }
        if (lists.length > 0) {
          data_post = {
            fid: this.fid,
            title: this.title,
            desc: this.desc,
            price: this.price,
            id: localStorage.getItem("user_id"),
            params:list_str
          }
        }

        this.axios.post(
          'http://localhost:5000/addcourse/',
          this.qs.stringify(data_post)).then((result) => {
          if (result.data.code === 200) {
            this.$toast.success('課程添加成功');
            this.cid = result.data.cid;
          } else {
            this.$toast.fail(result.data.msg);
          }
        });
      },
      //獲取數據
      get_data: function () {
        //發(fā)送請求
        this.axios.get(
          'http://localhost:5000/catelist/').then((result) => {
          console.log(result);
          // 聲明根節(jié)點
          var mytree = {'id': 0, name: ""};
          mytree['children'] = result.data;
          this.mydata = mytree;
          console.log(this.mydata);
        });
      }
    }
  }
</script>


<style scoped>

  ul {
    padding-left: 10rem;
    list-style: none;
  }

</style>