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vue引入百度地图BMapGL,以及辅助工具BMapGLLib

vue引入百度地图BMapGL,以及辅助工具BMapGLLib

作者: andcen | 来源:发表于2020-12-11 09:18 被阅读0次
BMapGL画图工具的引入.jpg
写在前面

前面有篇文章【vue引入百度地图BMapGL,或者其他个性化地图】写了一个关于vue百度地图BMapGL的引入,有人问怎么引入BMapGLLib ,因为我在项目只用了其中的一点点简单的,所以关于绘制的是自己撸的没有引入BMapGLLib 。既然有人问,那么就弄了一下。

文件结构

BMapGLLib.vue是文件,bmpgl_lib.js是调用方法


文件结构.jpg

在src里面创建一个bmpgl_lib.js

其实建立在哪看你自己的意愿啦。(小声逼逼)
如果只用BMapGL那么只用loadBaiDuMap() 这个方法就好了。(再次小声逼逼)

const ak = 'XXXXXX' // 百度的地图密钥
/**
 * 异步加载百度地图
 * @returns {Promise}
 * @constructor
 */
function loadBaiDuMap() {
  return new Promise(function (resolve, reject) {
    try {
      console.log('BMap is defined:', BMapGL === undefined || BMapGL)
      resolve(BMapGL)
    } catch (err) {
      window.init = function () {
        resolve(BMapGL)
      }
      let script = document.createElement('script')
      script.type = 'text/javascript'
      script.src = `http://api.map.baidu.com/api?v=1.0&type=webgl&ak=${ak}&callback=init`
      script.onerror = reject
      document.body.appendChild(script)
    }
  })
}
export { loadBaiDuMap }
/**
 * 异步加载百度地图,以及绘制工具
 * @returns {Promise}
 * @constructor
 */
function loadBaiDuDrawMap() {
  return loadBaiDuMap().then(BMapGL => {
    let loaded = false
    try {
      loaded = (BMapGLLib && BMapGLLib.DrawingManager)
    } catch (err) {
      loaded = false
    }
    if (!loaded) {
      console.log('BMapLib.DrawingManager loading!')
      let script = document.createElement('script')
      script.type = 'text/javascript'
      script.src = 'http://mapopen.cdn.bcebos.com/github/BMapGLLib/DrawingManager/src/DrawingManager.min.js'
      document.body.appendChild(script)
      let link = document.createElement('link')
      link.rel = 'stylesheet'
      link.href = 'http://mapopen.cdn.bcebos.com/github/BMapGLLib/DrawingManager/src/DrawingManager.min.css'
      document.body.appendChild(link)
    } else {
      console.log('BMapLib.DrawingManager is loaded!')
    }
    return BMapGL
  })
}
export { loadBaiDuDrawMap }

vue页面里面引入

<template>
  <div class="home">
    <!-- BMapGLLib 控件,这里自己去优化一下吧,写成循环吧 ,,懒得写了 -->
    <ul class="drawing-panel">
      <li class="bmap-btn bmap-marker" @click="draw('marker')" :style="{ 'background-position-y': actNav === 'marker' ? '-52px' : '0px'}"></li>
      <li class="bmap-btn bmap-polyline" @click="draw('polyline')" :style="{ 'background-position-y': actNav === 'polyline' ? '-52px' : '0px' }"></li>
      <li class="bmap-btn bmap-rectangle" @click="draw('rectangle')" :style="{ 'background-position-y': actNav === 'rectangle' ? '-52px' : '0px' }"></li>
      <li class="bmap-btn bmap-polygon" @click="draw('polygon')" :style="{'background-position-y': actNav === 'polygon' ? '-52px' : '0px'}"></li>
      <li class="bmap-btn bmap-circle" @click="draw('circle')" :style="{'background-position-y': actNav === 'circle' ? '-52px' : '0px'}"></li>
    </ul>
    <!-- 地图容器 -->
    <div id="container" class="allmap"></div>
  </div>
</template>

<script>
// 引入异步引入地图的方法
import { loadBaiDuDrawMap } from "@/bmpgl_lib.js";
export default {
  name: "home",
  data() {
    return {
      map: null,
      actNav: "",
    };
  },
  mounted() {
    this.initMap();
  },
  methods: {
    initMap() {
      // 初始化地图
      loadBaiDuDrawMap().then((BMapGL) => {
        // 创建地图实例
        let map = new BMapGL.Map("container");
        // 添加比例尺控件
        map.addControl(
          new BMapGL.ScaleControl({
            anchor: BMAP_ANCHOR_BOTTOM_LEFT,
            offset: new BMapGL.Size(10, 10),
          })
        );
        // 添加缩放控件
        map.addControl(
          new BMapGL.ZoomControl({
            anchor: BMAP_ANCHOR_BOTTOM_RIGHT,
            offset: new BMapGL.Size(10, 10),
          })
        );
        // 保存地图
        this.map = map
        // 创建点坐标 axios => res 获取的初始化定位坐标
        const point = new BMapGL.Point(114.031761, 22.542826);
        // 初始化地图,设置中心点坐标和地图级别
        map.centerAndZoom(point, 19);
        //开启鼠标滚轮缩放
        map.enableScrollWheelZoom(true);
        map.setHeading(64.5);
        map.setTilt(73);
      });
    },
    draw(type) {
      this.actNav = type
      const styleOptions = {
        strokeColor: "#5E87DB", // 边线颜色
        fillColor: "#5E87DB", // 填充颜色。当参数为空时,圆形没有填充颜色
        strokeWeight: 2, // 边线宽度,以像素为单位
        strokeOpacity: 1, // 边线透明度,取值范围0-1
        fillOpacity: 0.2, // 填充透明度,取值范围0-1
      };
      const labelOptions = {
        borderRadius: "2px",
        background: "#FFFBCC",
        border: "1px solid #E1E1E1",
        color: "#703A04",
        fontSize: "12px",
        letterSpacing: "0",
        padding: "5px",
      };
      // 实例化鼠标绘制工具
      const drawingManager = new BMapGLLib.DrawingManager(this.map, {
        // isOpen: true,        // 是否开启绘制模式
        enableCalculate: false, // 绘制是否进行测距测面
        enableSorption: true, // 是否开启边界吸附功能
        sorptiondistance: 20, // 边界吸附距离
        rectangleOptions: styleOptions, // 矩形的样式
      });
      if (drawingManager.isOpen_ && drawingManager.getDrawingMode() === type) {
        drawingManager.close();
      } else {
        drawingManager.setDrawingMode(type);
        drawingManager.open();
      }
    },
  },
};
</script>
<style lang="scss">
// 隐藏版权信息
.BMap_cpyCtrl {
  display: none;
}
// 隐藏版权图标
.anchorBL img {
  display: none;
}
</style>
<style lang="scss" scoped>
.allmap {
  width: 100%;
  height: 100vh;
  position: relative;
  z-index: 1;
}
.change-map-type {
  position: absolute;
  right: 50px;
  bottom: 10px;
  z-index: 2;
}
ul li {
  list-style: none;
}
.info {
  z-index: 999;
  width: auto;
  min-width: 22rem;
  padding: 0.75rem 1.25rem;
  margin-left: 1.25rem;
  position: fixed;
  top: 1rem;
  background-color: #fff;
  border-radius: 0.25rem;
  font-size: 14px;
  color: #666;
  box-shadow: 0 2px 6px 0 rgba(27, 142, 236, 0.5);
}
.drawing-panel {
  z-index: 999;
  position: fixed;
  top: 20px;
  right: 20px;
  border-radius: 0.25rem;
  height: 47px;
  box-shadow: 0 2px 6px 0 rgba(27, 142, 236, 0.5);
}
.bmap-btn {
  border-right: 1px solid #d2d2d2;
  float: left;
  width: 64px;
  height: 100%;
  background-image: url(http://api.map.baidu.com/library/DrawingManager/1.4/src/bg_drawing_tool.png);
  cursor: pointer;
}
.drawing-panel .bmap-marker {
  background-position: -65px 0;
}
.drawing-panel .bmap-polyline {
  background-position: -195px 0;
}
.drawing-panel .bmap-rectangle {
  background-position: -325px 0;
}
.drawing-panel .bmap-polygon {
  background-position: -260px 0;
}
.drawing-panel .bmap-circle {
  background-position: -130px 0;
}
</style>

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