微信小程序实现选择地址省市区三级联动

本文实例为大家分享了微信小程序实现选择地址省市区三级联动的具体代码，供大家参考，具体内容如下

微信原生地址API，缺少省市区code，因此自己写了一个收货地址

思路：在onload预先加载全部省和第一个省的全部市和区，加载全部会导致几秒的事件阻塞。点击选择地址弹窗后，按需加载操作，滑动省加载对应的市和第一个市对应的区，滑动市加载区，滑动区只更改区的值

onLoad: function(options) {
 var that = this;
 // 此文件为全部省以及第一个省的市和区
 var cityData = districtLoad.districtLoad;
 // 存放省
 const provinces = [];
 // 存放市
 const citys = [];
 // 存放区
 const countys = [];
 for (let i = 0; i < cityData.length; i++) {
  provinces.push(cityData[i]);
 }
 for (let i = 0; i < cityData[0].sub.length; i++) {
  citys.push(cityData[0].sub[i])
 }
 for (let i = 0; i < cityData[0].sub[0].sub.length; i++) {
  countys.push(cityData[0].sub[0].sub[i])
 }
 that.setData({
  provinces,
  citys,
  countys
 })
 }

滑动省市区事件

bindChange: function(e) {
 var that = this;
 var val = e.detail.value
 var t = this.data.values;
 // 滑动省
 if (val[0] != t[0]) {
  const citys = [];
  const countys = [];
  // 保存市
  for (let i = 0; i < cityData[val[0]].sub.length; i++) {
  citys.push(cityData[val[0]].sub[i])
  }
  // 保存第一个市的全部区
  for (let i = 0; i < cityData[val[0]].sub[0].sub.length; i++) {
  countys.push(cityData[val[0]].sub[0].sub[i])
  }
  // 保存
  this.setData({
  province: cityData[val[0]].name,
  city: cityData[val[0]].sub[0].name,
  citys: citys,
  countys: countys,
  values: val,
  value: [val[0], 0, 0],
  fdeliveryProvince: this.data.provinces[val[0]].code,
  fdeliveryCity: cityData[val[0]].sub[0].code,
  })
  // 防止只有省市的情况
  if (cityData[val[0]].sub[0].sub.length!=0){
  that.setData({
   county: cityData[val[0]].sub[0].sub[0].name,
   fdeliveryArea: cityData[val[0]].sub[0].sub[0].code
  })
  }else {
  that.setData({
   county: '',
   fdeliveryArea:''
  })
  }
  return;
 }
 // 滑动市
 if (val[1] != t[1]) {
  const countys = [];
  // 保存市
  for (let i = 0; i < cityData[val[0]].sub[val[1]].sub.length; i++) {
  countys.push(cityData[val[0]].sub[val[1]].sub[i])
  }
  // 保存
  this.setData({
  city: this.data.citys[val[1]].name,
  countys: countys,
  values: val,
  value: [val[0], val[1], 0],
  fdeliveryCity: this.data.citys[val[1]].code,
  })
  // 防止只有省市的情况
  if (countys.length != 0) {
  that.setData({
   county: cityData[val[0]].sub[val[1]].sub[0].name,
   fdeliveryArea: cityData[val[0]].sub[val[1]].sub[0].code
  })
  } else {
  that.setData({
   county: '',
   fdeliveryArea: ''
  })
  }
  return;
 }
 // 滑动区
 if (val[2] != t[2]) {
  this.setData({
  county: this.data.countys[val[2]].name,
  values: val,
  fdeliveryArea: this.data.countys[val[2]].code
  })
  return;
 }
 }

html

<view class="citypicker" wx:if="{{condition}}">
 <view class="cityheader">
 <view bindtap="open" class="city-cancel">取消</view>
 <view bindtap="open" class="city-true">确定</view>
 </view>
 <picker-view indicator-style="height: 40px;" style="font-size:30rpx; width: 100%; height: 290px;" value="{{value}}" bindchange="bindChange" class="citybody">
 <picker-view-column>
  <view wx:for="{{provinces}}" wx:key="{{item.name}}" wx:code="{{item.code}}" style="line-height: 40px;padding-left:10px;">{{item.name}}</view>
 </picker-view-column>
 <picker-view-column>
  <view wx:for="{{citys}}" wx:key="{{item.name}}" wx:code="{{item.code}}" style="line-height: 40px;padding-left:10px;">{{item.name}}</view>
 </picker-view-column>
 <picker-view-column>
  <view wx:for="{{countys}}" wx:key="{{item.name}}" wx:code="{{item.code}}" style="line-height: 40px;padding-left:10px;">{{item.name}}</view>
 </picker-view-column>
 </picker-view>
</view>

效果图

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