js树形、、、

<template>
  <view class="aaa">
    <br />
    <view class="f1"> 请选择服务人员服务区域 </view>

    <view class=""> 四川 </view>
    <view class=""> 已认证8个城市 </view>

    <br />

    <view class="">
      <my-tree
        :tree-data="testJson"
        @xuanzhong="xuanzhong"
        @bindPickerChange="bindPickerChange"
      ></my-tree>
    </view>
  </view>
</template>

<script>
import myTree from "./myTree.vue";

export default {
  components: {
    myTree,
  },
  data() {
    return {
      testJson: "",
    };
  },
  onLoad() {
    this.aaa();
    this.testJson = require("./data.json");
    this.testJson = [
      {
        code: "51",
        name: "四川省",
        show: true,
        children: [
          {
            code: "5101",
            name: "成都市",
            show: false,
            children: [
              {
                code: "510107",
                name: "武侯区",
                show: true,
              },
              {
                code: "510116",
                name: "双流区",
                show: true,
              },
            ],
          },
        ],
      },
    ];
  },
  methods: {
    aaa() {
      this.$post(
        "/Public/GetAreaList",
        {},
        {
          isLoading: true,
        }
      ).then((res) => {});
    },
  },
};
</script>

<style lang="scss" scoped>
.aaa {
}
.f1 {
  text-align: center;
  color: rgba(16, 16, 16, 1);
  font-size: 24px;
}
</style>

<template>
  <div class="tree-item">
    <div v-for="item in treeData" :key="item.id">
      <div class="item-title" @click="nodeClick(item)">
        <span :class="item.show ? 'active' : ''">{{ item.name }}</span>
        <span v-if="item.children && item.children.length">
          [{{ isOpen(item.id) ? "-" : "+" }}]
        </span>
      </div>
      <div
        v-if="item.children && item.children.length"
        v-show="isOpen(item.id)"
        class="item-childen"
      >
        <my-tree
          :treeData="item.children"
          @node-click="$emit('node-click', $event)"
        ></my-tree>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "myTree",
  props: {
    treeData: {
      type: Array,
      default: () => [],
    },
  },
  data() {
    return {
      expandedKeys: [], // 当前展开的节点id组成的数组
    };
  },
  methods: {
    nodeClick(item) {
      this.$emit("node-click", item);
      if (item.children && item.children.length) {
        let index = this.expandedKeys.indexOf(item.id);
        if (index > -1) {
          // 如果当前节点id存在数组中，则删除
          this.expandedKeys.splice(index, 1);
        } else {
          // 如果当前节点id不存在数组中，则添加
          this.expandedKeys.push(item.id);
        }
      }
    },
    isOpen(id) {
      // 判断节点id在不在数组中，在则显示，不在则隐藏
      return this.expandedKeys.includes(id);
    },
  },
};
</script>

<style lang="scss" scoped>
.active {
  color: red;
}
.tree-item {
  cursor: pointer;
  .item-title {
    padding: 4px 8px;
    &:hover {
      background: #eee;
    }
  }
  .item-childen {
    padding-left: 20px;
  }
}
</style>