微信小程序-实现省市区三级联动

.wxml

<view class="section">
  <picker mode="region" bindchange="bindRegionChange" value="{{region}}" custom-item="{{customItem}}">
    <view class="picker">
      当前选择：{{region[0]}}{{region[1]}}{{region[2]}}
    view>
  picker>
view>

.js

Page({
  data: {
    region: ['上海市', '上海市', '黄浦区'],
    customItem: ''
  },
  bindRegionChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      region: e.detail.value
    })
  }
})