一、功能：定位；精准定位；拖拽选点；编辑遮罩物；工具条

二、实现过程：

1、申请Key，我申请的是Web端（JS API），不同的API效果可能不一样

2、在index.html中引入：

<script type="text/javascript" src="https://webapi.amap.com/maps?v=1.4.8&key = 你自己的Key"></script>

3、在webpack.base.conf.js加入(预防Eslint的报错：AMap是undefined，在vue-cli3,vue-cli4配置不尽相同，可以忽略这个Eslint错误)

externals: {

    'AMap': 'AMap',

    'AMapUI': 'AMapUI'

}

4、创建一个文件：map.vue

<style scoped>
  .amap-wrapper {
    width: 500px;
    height: 500px;
  }
</style>
<template>
  <div>
    <div id="container-map" style="width:500px; height:500px"></div>
    <button @click="addTool">加载</button>
    <button @click="addCircle">画圆</button>
    <button @click="thisLocation">定位</button>
    <button @click="cancelLocation">取消圆</button>
    <button @click="getMaker">获取覆盖物信息</button>
    <input type="text" id="input_id">
    <span>{{chosePosition}}</span>
    <span>圆的长度{{myCircle.radius}}</span>
  </div>
</template>

<script>

import AMap from 'AMap'
import AMapUI from 'AMapUI'
export default {
  name: 'map',
  data () {
    return {
      map: null,
      /* 当前位置 */
      thisPosition: {
        location: '',
        lng: '',
        lat: ''
      },
      /* 选取的位置 */
      chosePosition: {
        location: '',
        lng: '',
        lat: ''
      },
      /* 范围圆的数据 */
      myCircle: {},
      /* 签到圆对象 */
      circle: {},
      /* 编辑器对象 */
      circleEditor: null,
      /* 拖拽对象 */
      positionPickerObj: {},
      /* 当前城市编码 */
      citycode: '020'
    }
  },
  methods: {
    /* 添加工具条 */
    addTool () {
      AMap.plugin(['AMap.ToolBar', 'AMap.Driving'], () => {
        let toolbar = new AMap.ToolBar()
        this.map.addControl(toolbar)
      })
    },
    /* 定位具体位置 */
    thisLocation () {
      this.map.plugin('AMap.Geolocation', () => {
        let geolocation = new AMap.Geolocation({
          // 是否使用高精度定位，默认：true
          enableHighAccuracy: true,
          // 设置定位超时时间，默认：无穷大
          timeout: 10000,
          // 定位按钮的停靠位置的偏移量，默认：Pixel(10, 20)
          buttonOffset: new AMap.Pixel(10, 20),
          //  定位成功后调整地图视野范围使定位位置及精度范围视野内可见，默认：false
          zoomToAccuracy: false,
          //  定位按钮的排放位置,  RB表示右下
          buttonPosition: 'RB'
        })
        this.map.addControl(geolocation)
        geolocation.getCurrentPosition()
        AMap.event.addListener(geolocation, 'complete', (data) => {
          console.log(data)
          this.citycode = data.addressComponent.cityCode
          this.thisPosition = data.position
          this.thisPosition.message = data.formattedAddress
          this.chosePosition = this.thisPosition
          /* 画圆 */
          this.cancelLocation()
          this.addCircle()
          /* 拖拽选址 */
          this.positionPicker()
        })
        AMap.event.addListener(geolocation, 'error', function (data) {
          alert('定位失败')
        })
      })
    },
    /* 画图 */
    addCircle () {
      this.myCircle = {
        center: [this.chosePosition.lng, this.chosePosition.lat], // 圆心位置
        radius: 300, // 半径
        strokeColor: '#FFFF00', // 线颜色
        strokeOpacity: 0.2, // 线透明度
        strokeWeight: 1, // 线粗细度
        fillColor: '#222222', // 填充颜色
        fillOpacity: 0.2// 填充透明度
      }
      this.circle = new AMap.Circle(this.myCircle)
      this.circle.setMap(this.map)
      // 引入多边形编辑器插件
      this.map.plugin(['AMap.CircleEditor'], () => {
        // 实例化多边形编辑器，传入地图实例和要进行编辑的多边形实例
        this.circleEditor = new AMap.CircleEditor(this.map, this.circle)
        // 开启编辑模式
        this.circleEditor.open()
        this.myCircle.radius = this.circle.Mg.radius
        this.circleEditor.on('adjust', (data) => {
          this.myCircle.radius = data.radius
        })
        this.circleEditor.on('move', (data) => {
          console.log('移动')
          this.chosePosition.lng = data.lnglat.lng
          this.chosePosition.lat = data.lnglat.lat
        })
      })
    },
    /* 取消圆 */
    cancelLocation () {
      this.map.remove(this.circle)
      if (this.circleEditor) {
        this.circleEditor.close()
      }
    },
    /* 搜索 */
    search () {
      let vm = this
      AMap.plugin(['AMap.PlaceSearch', 'AMap.Autocomplete'], () => {
        var autoOptions = {
          city: this.citycode,
          input: 'input_id'
        }
        // eslint-disable-next-line no-unused-vars
        let autoComplete = new AMap.Autocomplete(autoOptions)
        // eslint-disable-next-line no-unused-vars
        let placeSearch = new AMap.PlaceSearch({
          city: this.citycode,
          map: vm.map
        })
        AMap.event.addListener(autoComplete, 'select', e => {
          // TODO 针对选中的poi实现自己的功能
          placeSearch.setCity(e.poi.adcode)
          // placeSearch.search(e.poi.name)
          this.chosePosition = e.poi.location
          if (this.chosePosition) {
            /* 画圆 */
            this.cancelLocation()
            this.addCircle()
            /* 拖拽选址 */
            this.positionPickerObj.stop()
            this.positionPicker()
            this.createWindow()
          }
        })
      })
    },
    /* 获取覆盖物信息 */
    getMaker () {
      var overlaysList = this.map.getAllOverlays('circle')
      console.log(overlaysList)
      // 可选参数有:‘marker’、‘circle’、‘polyline’、‘polygon
    },
    /* 拖拽选址 */
    positionPicker () {
      AMapUI.loadUI(['misc/PositionPicker'], (PositionPicker) => {
        this.positionPickerObj = new PositionPicker({
          mode: 'dragMarker', // 设定为拖拽地图模式，可选'dragMap'、'dragMarker'，默认为'dragMap'
          map: this.map // 依赖地图对象
        })
        this.positionPickerObj.on('success', (positionResult) => {
          this.chosePosition = positionResult.position
          /* 画圆 */
          this.cancelLocation()
          this.addCircle()
        })
        this.positionPickerObj.start([this.chosePosition.lng, this.chosePosition.lat])
      })
    },
    /* 创建信息窗体 */
    createWindow () {
      // 信息窗体的内容
      var content = [
        '<div style="width: 100%;>',
        '<div class="fs-16">范围: 200米</div>',
        '<div class="fs-14">位置不准确？试试拖拽鼠标或者输入地点</div></div>'
      ]
      // 创建 infoWindow 实例
      var infoWindow = new AMap.InfoWindow({
        content: content.join('<br>'),  // 传入 dom 对象，或者 html 字符串
        offset: new AMap.Pixel(0, -50)
      })
      // 打开信息窗体
      infoWindow.open(this.map, this.chosePosition)
    }
  },
  activated () {
  },
  mounted () {
    this.map = new AMap.Map('container-map', {
      resizeEnable: true,
      zoom: 15,
      viewMode: '2D',
      zooms: [4, 18]
    })
    /* 添加工具条 */
    this.addTool()
    /* 获取当前位置 */
    this.thisLocation()
    /* 添加搜索功能 */
    this.search()
  }
}
</script>

4、效果图

进行过优化的效果图：具有搜索选址、拖拽选址、范围选址、经纬度转换为地点名称等功能：