vue每日一学：学习下vue-amap的使用

vue每日一学：学习下vue-amap的使用。

vue-amap是饿了么开源的一套基于 Vue 2.0 和高德地图的地图组件。 数据状态与地图状态单向绑定，开发者无需关心地图的具体操作。

官方文档：https://elemefe.github.io/vue-amap/

步骤如下：

1.npm 安装

npm install vue-amap --save

如果是CDN方式，目前可通过unpkg.com/vue-amap获取最新版本的资源。

<script src="https://unpkg.com/vue-amap/dist/index.js"></script>

2.使用实例

实例需求描述：搜索并选择地址，选中后地图定位到该地址，并获取经纬度自动填入下方的输入框中。

注：实例中使用的框架是ElementUI，其表单组件使用比较方便。

实现步骤：

（1）安装后在main.js中设置以下内容：

import VueAMap from "vue-amap";
Vue.use(VueAMap);
// 初始化vue-amap
VueAMap.initAMapApiLoader({
  key: "your key", // 这里写你申请的高德地图的key
  plugin: ["AMap.Autocomplete", "AMap.Geocoder", "AMap.Geolocation"],
  v: "1.4.15",
  uiVersion: "1.1"
});

（2）定义地图搜索组件 base/mapSearch/baseMapSearch.vue

<template>
  <div>
    <div>
      <el-input
        v-model="searchKey"
        type="search"
        id="search"
        placeholder="请输入详细地址"
      ></el-input>
      <!--<button @click="searchByHand">搜索</button>-->
      <div id="searchTip"></div>
    </div>
    <!--
      amap-manager： 地图管理对象
      vid：地图容器节点的ID
      zooms： 地图显示的缩放级别范围，在PC上，默认范围[3,18]，取值范围[3-18]；在移动设备上，默认范围[3-19]，取值范围[3-19]
      center： 地图中心点坐标值
      plugin：地图使用的插件
      events： 事件
    -->
    <div>
      <el-amap
        :amap-manager="amapManager"
        :vid="'amap-vue'"
        :zoom="zoom"
        :plugin="plugin"
        :center="center"
        :events="events"
      >
        <!-- 标记 -->
        <el-amap-marker
          v-for="(marker, index) in markers"
          :position="marker"
          :key="index"
        ></el-amap-marker>
      </el-amap>
    </div>
  </div>
</template>
<script>
import { AMapManager, lazyAMapApiLoaderInstance } from "vue-amap";
let amapManager = new AMapManager();
export default {
  props: ["city", "value", "longitude", "latitude", "isEdit"],
  data() {
    let self = this;
    return {
      address: null,
      searchKey: "",
      amapManager,
      markers: [],
      searchOption: {
        city: this.city ? this.city : "全国",
        citylimit: true
      },
      center: [121.329402, 31.228667],
      zoom: 17,
      lng: 0,
      lat: 0,
      loaded: false,
      events: {
        init() {
          lazyAMapApiLoaderInstance.load().then(() => {
            self.initSearch();
          });
        },
        // 点击获取地址的数据
        click(e) {
          self.markers = [];
          let { lng, lat } = e.lnglat;
          self.lng = lng;
          self.lat = lat;
          self.center = [lng, lat];
          self.markers.push([lng, lat]);
          // 这里通过高德 SDK 完成。
          let geocoder = new AMap.Geocoder({
            radius: 1000,
            extensions: "all"
          });
          geocoder.getAddress([lng, lat], function(status, result) {
            if (status === "complete" && result.info === "OK") {
              if (result && result.regeocode) {
                self.address = result.regeocode.formattedAddress;
                self.searchKey = result.regeocode.formattedAddress;
                self.$emit("updateLocation", lng, lat, self.searchKey);
                self.$nextTick();
              }
            }
          });
        }
      },
      // 一些工具插件
      plugin: [
        {
          // 定位
          pName: "Geolocation",
          events: {
            init(o) {
              // o是高德地图定位插件实例
              o.getCurrentPosition((status, result) => {
                if (result && result.position) {
                  if (self.isEdit) {
                    // 设置经度
                    self.lng = self.longitude;
                    // 设置维度
                    self.lat = self.latitude;
                    // 设置坐标
                    self.center = [self.longitude, self.latitude];
                    self.markers.push([self.longitude, self.latitude]);
                  } else {
                    // 设置经度
                    self.lng = result.position.lng;
                    // 设置维度
                    self.lat = result.position.lat;
                    // 设置坐标
                    self.center = [self.lng, self.lat];
                    self.markers.push([self.lng, self.lat]);
                  }
                  // load
                  self.loaded = true;
                  // 页面渲染好后
                  self.$nextTick();
                }
              });
            }
          }
        }
      ]
    };
  },
  created() {
    if (this.value) {
      this.searchKey = this.value;
      this.address = this.value;
    }
    if (this.longitude && this.latitude) {
      this.lng = this.longitude;
      this.lat = this.latitude;
      this.center = [this.longitude, this.latitude];
      this.markers.push([this.longitude, this.latitude]);
    }
  },
  methods: {
    // 选择地址后自动定位到当前地址附近
    updateAddress(value, longitude, latitude) {
      this.searchKey = value;
      this.address = value;
      this.lng = longitude;
      this.lat = latitude;
      this.center = [longitude, latitude];
      this.markers.push([longitude, latitude]);
    },
    initSearch() {
      let vm = this;
      let map = this.amapManager.getMap();
      AMapUI.loadUI(["misc/PoiPicker"], function(PoiPicker) {
        let poiPicker = new PoiPicker({
          input: "search",
          placeSearchOptions: {
            map: map,
            pageSize: 10
          },
          suggestContainer: "searchTip",
          searchResultsContainer: "searchTip"
        });
        vm.poiPicker = poiPicker;
        // 监听poi选中信息
        poiPicker.on("poiPicked", function(poiResult) {
          let source = poiResult.source;
          let poi = poiResult.item;
          if (source !== "search") {
            poiPicker.searchByKeyword(poi.name);
          } else {
            poiPicker.clearSearchResults();
            vm.markers = [];
            let lng = poi.location.lng;
            let lat = poi.location.lat;
            let address = poi.name; // poi.cityname + poi.adname + poi.name
            vm.center = [lng, lat];
            vm.markers.push([lng, lat]);
            vm.lng = lng;
            vm.lat = lat;
            vm.address = address;
            vm.searchKey = address;
            vm.$emit("updateLocation", lng, lat, vm.searchKey);
          }
        });
      });
    },
    searchByHand() {
      if (this.searchKey !== "" && this.poiPicker) {
        this.poiPicker.searchByKeyword(this.searchKey);
      }
    }
  }
};
</script>
<style>
.search-box {
  margin-top: 6px;
  width: 100%;
}
.search-box input {
  padding: 0 15px;
  width: 100%;
  height: 32px;
  line-height: 32px;
  color: #606266;
  border: 1px solid #dcdfe6;
  border-radius: 4px;
}
.search-box input:focus {
  border-color: #409eff;
  outline: 0;
}
.search-box input::-webkit-input-placeholder {
  color: #c0c4cc;
}
.tip-box {
  width: 100%;
  max-height:280px;
  position: absolute;
  top: 72px;
  z-index: 10000;
  overflow-y: auto;
  background-color: #fff;
}
</style>
<style>
.amap-ui-poi-picker-sugg,
.amap_lib_placeSearch {
  border: 1px solid #eee;
  border-radius: 4px;
}
.amap-box {
  height: 200px;
}
</style>

这里样式使用了stylus，可自行转换其他样式。

（3）在组件中使用地图搜索组件，这里以弹窗为例

<template>
  <el-dialog
    :title="title"
    :visible.sync="visible"
    :before-close="handleClose"
    width="600px"
    append-to-body
    :close-on-click-modal="false"
    :close-on-press-escape="false"
  >
    <div class="form-info">
      <el-form
        :model="form"
        ref="form"
        :rules="rules"
        size="small"
        label-width="110px"
      >
        <el-form-item label="选择地址" prop="address">
          <base-map-search
            ref="mapSearch"
            :city="form.city"
            :value="form.address"
            :longitude="form.addLon"
            :latitude="form.addLat"
            :isEdit="isEdit"
            @updateLocation="updateLocation"
          />
        </el-form-item>
        <el-row>
          <el-col :span="12">
            <el-form-item prop="addLon" label="经度">
              <el-input
                v-model.number="form.addLon"
                :maxlength="15"
                placeholder="请输入经度"
              ></el-input>
            </el-form-item>
          </el-col>
          <el-col :span="12" class="right-label-form-item">
            <el-form-item prop="addLat" label="纬度">
              <el-input
                v-model.number="form.addLat"
                :maxlength="15"
                placeholder="请输入纬度"
              ></el-input>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
    </div>
  </el-dialog>
</template>
<script>
import BaseMapSearch from "../base/mapSearch/baseMapSearch";
export default {
    props: ["visible", "isEdit", "detail"],
    components: {
      BaseMapSearch
    },
    data() {
        return {
            title: "添加地址",
            form: {
                address: "",
                addLon: "",
                addLat: ""
            },
            rules: {
                address: [
                  {
                    required: true,
                    message: "请输入地址",
                    trigger: ["blur", "change"]
                  }
                ],
                addLat: [
                  {
                    required: true,
                    message: "请输入纬度",
                    trigger: ["blur", "change"]
                  }
                ],
                addLon: [
                  {
                    required: true,
                    message: "请输入经度",
                    trigger: ["blur", "change"]
                  }
                ],
            }
        };
    },
    created() {
      if (this.isEdit) {
        this.initForm();
      }
    },
    methods: {
        // 初始化表单
        initForm() {
          this.title = "修改地址";
          if (this.detail) {
            this.form = { ...this.detail };
          }
        },
        // 地图搜索选址
        updateLocation(lng, lat, address) {
          this.form.addLon = lng;
          this.form.addLat = lat;
          this.form.address = address;
        },
        handleClose() {
          this.$emit("update:visible", false);
        }
    }
};
</script>

（4）这时，如果项目中使用了ESlint，会报AMap、AMapUI未定义的错误，我们需要在.eslintrc.js文件中定义globals属性：

module.exports = {
    // ...
    globals: {
      AMap: false,
      AMapUI: false
    }
};

大家可以放到开发软件里去测试下！！！