Page({
data: {
array: ['美国','中国','巴西','日本'],index: 0,},bindPickerChange: function(e) {
console.log('picker发送选择改变，携带值为',e.detail.value)
this.setData({
index: e.detail.value
})
},})

<view class="add-lab"&gt;收货地址</view>
<view class="add-text"&gt;
  <picker class="w-3" bindchange="bindPickerProvince" value="{{provinceIndex}}" range="{{province}}" >
    <view class="picker"&gt;{{province[provinceIndex]}}</view>
  </picker> 
  <picker class="w-3" bindchange="bindPickerCity" value="{{cityIndex}}" range="{{city}}" >
    <view class="picker"&gt;{{city[cityIndex]}}</view>
  </picker>
  <picker class="w-3" bindchange="bindPickerDistrict" value="{{districtIndex}}" range="{{district}}" >
    <view class="picker"&gt;{{district[districtIndex]}}</view>
  </picker>        
</view>

city:[].
city_id: [],city_name: [],cityIndex: 0,cityId: 0,district:[],district_id: [],district_name: [],districtIndex: 0,districtId: 0,onLoad:function(options){
// 页面初始化 options为页面跳转所带来的参数
var that = this
var get_data
wx.checkSession({
success: function(){
//登录态未过期
wx.getStorage({
key: 'wcx_session',success: function(sres) {
get_data = {
m: 'api',c: 'user',a: 'edit_address',wcx_session: sres.data,}
if(options.act == 'edit'){
get_data = {
m: 'api',id: options.id,}
}
wx.request({
url: app.globalData.ajaxUrl,data: get_data,header: {
'content-type': 'application/json'
},success: function(res) {

      if(options.act == "edit"){
       that.data.provinceId = res.data.consignee.province
       that.data.cityId = res.data.consignee.city
       that.data.districtid = res.data.consignee.district
      }
      for(var i=0; i<res.data.province_list.length; i++){{
       that.data.province_id[i] = res.data.province_list[i].region_id //把region_id存入province_id
       that.data.province_name[i] = res.data.province_list[i].region_name //把region_name存入province_name
       if(res.data.consignee.province == res.data.province_list[i].region_id){
        that.data.provinceIndex = i
       }
      }}
      for(var i=0; i<res.data.city_list.length; i++){{
       that.data.city_id[i] = res.data.city_list[i].region_id
       that.data.city_name[i] = res.data.city_list[i].region_name
       if(res.data.consignee.city == res.data.city_list[i].region_id){
        that.data.cityIndex = i
       }
      }}
      for(var i=0; i<res.data.district_list.length; i++){{
       that.data.district_id[i] = res.data.district_list[i].region_id
       that.data.district_name[i] = res.data.district_list[i].region_name
       if(res.data.consignee.district == res.data.district_list[i].region_id){
        that.data.districtIndex = i
       }
      }}
      that.data.address_id = options.id
      that.setData({
       consignee: res.data.consignee,province: that.data.province_name,provinceIndex: that.data.provinceIndex,city: that.data.city_name,cityIndex: that.data.cityIndex,district: that.data.district_name,districtIndex: that.data.districtIndex
      }) 
    }
   })
   //request
 } 
})

},fail: function(){
//登录态过期
wx.login()
}
})

},bindPickerProvince: function(event){
var that = this
var getId = event.detail.value //获取到wxml选择的选项对应的下标，从0开始
that.data.provinceId = that.data.province_id[getId] //根据获取到的下标获取到region_name对应的region_id
wx.request({
url: app.globalData.ajaxUrl,data: {
m: 'api',c: 'public',a: 'region',rtype: 2,rparent: that.data.provinceId,header: {
'content-type': 'application/json'
},success: function(res){
for(var i=0; i<res.data.regions.length; i++){{
that.data.city_id[i] = res.data.regions[i].region_id
that.data.city_name[i] = res.data.regions[i].region_name
}}
that.setData({
city: that.data.city_name,provinceIndex: getId,})
},})
},bindPickerCity: function(event){
var that = this
var getId = event.detail.value
that.data.cityId = that.data.city_id[getId]
wx.request({
url: app.globalData.ajaxUrl,rtype: 3,rparent: that.data.cityId,success: function(res){
for(var i=0; i<res.data.regions.length; i++){{
that.data.district_id[i] = res.data.regions[i].region_id
that.data.district_name[i] = res.data.regions[i].region_name
}}
that.setData({
district: that.data.district_name,cityIndex: getId,bindPickerDistrict: function(event){
var that = this
var getId = event.detail.value
that.data.districtId = that.data.district_id[getId]
that.setData({
districtIndex: getId,})
},formSubmit: function(event) {
var that = this
wx.checkSession({
success: function(){
//登录态未过期
wx.getStorage({
key: 'wcx_session',success: function(sres) {
wx.request({
url: app.globalData.ajaxUrl,data: {
m: 'api',a: 'add_address',address_id: that.data.address_id,province: that.data.provinceId,// wxml页面选择的地址对应的 region_id
city: that.data.cityId,district: that.data.districtId,address: event.detail.value.address,consignee: event.detail.value.consignee,mobile: event.detail.value.mobile,zipcode: event.detail.value.zipcode,success: function(res) {
console.log(res)
wx.redirectTo({
url: 'address'
})
}
})
//request
}
})
},fail: function(){
//登录态过期
wx.login()
}
})
},})