<!--pages/index/index.wxml-->
<view class='container'>
 <view bindtap='onChangeAddress'>
  <input value="{{address}}" name="address" placeholder="选择地点">
 </view>
</view>

// pages/index/index.js
Page({
 data: {
  address: ''
 },
 onChangeAddress() {
  var _page = this;
  wx.chooseLocation({
   success: (res) => {
    _page.setData({
     address: res.name
    });
   },
   fail: (err) => {
    console.log(err);
   }
  });
 }
})

<!--pages/map/map.wxml-->
<view class="container">
 <map
  id="myMap"
  style="width: 100%; height: 100%;"
  latitude="{{latitude}}"
  longitude="{{longitude}}"
  markers="{{markers}}"
  show-location
 ></map>
</view>

// pages/map/map.js
Page({
 data: {
  latitude: 31.22786,
  longitude: 121.46658,
  markers: [{
   id: 1,
   latitude: 31.22786,
   longitude: 121.46658,
   name: '上海招商局广场'
  }]
 },
 onReady(e) {
  this.mapCtx = wx.createMapContext('myMap')
 }
})