封面图,基于创客贴在线制作
目录结构
这是《基于nuxt和iview搭建OM后台管理系统实践》这一个系列文章的目录,大致思路如下:
自行封装的公共组件,富文本quill[已完成]、地图、上传组件(阿里oss、七牛上传组件已经完成)的封装过程
项目上线流程,自动化打包(Jenkins)
项目总结,总结开发过程中的坑点,避免以后再掉坑
前言
上几篇记录了几个功能比较简单的组件,本篇的高德地图封装遇到了蛮多坑,在此记录一下,避免后面再踩坑。
说到地图组件,其实是其他项目组需要地图数据展示,然后我被借调到其他项目组,最终翻阅高德地图众多api后终于完成了。
直接看东西
高德地图组件展示
本地数据原因,没有完整的展示地图组件功能,待去公司再截取动态图
核心代码
// 文件componets/amap-weather.vue<template> <div> <Form :model="searchForm" :label-width="190" inline> <FormItem label="地区"> <Select v-model="searchForm.crop" @on-change="changeImage"> <Option v-for="item in crops" :value="item.title" :key="item.id">{{item.title}}</Option> </Select> </FormItem> </Form> <div :id="id" :></div> </div></template><script> // import VeAmap from 'v-charts/lib/amap'; import axios from "../plugins/axios"; export default { name: "VAmap", data() { return { weaherData: [], weatherVoList: [], arr: [], polygons: [], searchForm: { crop: '' }, crops: [], latID: 124.298158, lngID: 43.223817 }; }, props: { id: { default: "container" }, width: { default: "100%" }, zoom: { default: 15 }, height: { default: "800px" }, getlandRequestURL: { default: "" }, getgeoJsonURL: { default: "" }, getWeatherJsonURL: { default: "" }, getAreaData: { default: "" } }, head() { return { script: [ { src: "http://webapi.amap.com/maps?v=1.4.5&key=key自行去高德地图开发者中心申请&&plugin=AMap.ToolBar" } ] }; }, created: function () { }, mounted() { var _this = this; if (process.browser) { _this.initMap(); _this.getData(); } }, methods: { getData() { var _this = this axios.get(_this.getAreaData).then(res => { this.crops = res.data.area }).catch(error => { console.log(error); }); }, changeImage(e) { var _this = this; this.polygons = []; axios.get(_this.getAreaData).then(res => { var changeData = res.data.area changeData.forEach(el => { if (el.title == e) { this.latID = el.point.lat; this.lngID = el.point.lng var _this = this; this.initMap() } }) }).catch(error => { console.log(error); }); }, initMap() { //地图初始化 var _this = this; var googleLayer = new AMap.TileLayer({ getTileUrl: "http://mt{1,2,3,0}.google.cn/vt/lyrs=s&hl=zh-CN&gl=cn&x=[x]&y=[y]&z=[z]&s=Galile" }); //定义谷歌卫星切片图层 var roadNetLayer = new AMap.TileLayer.RoadNet(); //定义一个路网图层 var map = new AMap.Map(this.id, { resizeEnable: true, center: [_this.latID, _this.lngID], zoom: _this.zoom, layers: [googleLayer, roadNetLayer] //设置图层 }); var toolBar = new AMap.ToolBar({ visible: true }); map.addControl(toolBar); // debugger; // 初始化 var bounds = map.getBounds(); var northeast = bounds.Kb.lng + ',' + bounds.Kb.lat; var northwest = bounds.Nb.lng + "," + bounds.Kb.lat; var southwest = bounds.Nb.lng + ',' + bounds.Nb.lat; var southeast = bounds.Kb.lng + ',' + bounds.Nb.lat; var area = northeast + ";" + northwest + ";" + southwest + ";" + southeast + ";" + northeast _this.loadLandData(area, map); //加载可视范围内的地块 map.on("moveend", function (e) { //监听页面变化 //获取可视区域的经纬度 var getBounds = map.getBounds() var bounds = map.getBounds(); var northeast = bounds.Kb.lng + ',' + bounds.Kb.lat; var northwest = bounds.Nb.lng + "," + bounds.Kb.lat; var southwest = bounds.Nb.lng + ',' + bounds.Nb.lat; var southeast = bounds.Kb.lng + ',' + bounds.Nb.lat; var area = northeast + ";" + northwest + ";" + southwest + ";" + southeast + ";" + northeast _this.loadLandData(area, map); //加载可视范围内的地块 }); }, loadLandData(area, map) { //根据当前区域经纬度获取地图区域的地块 let _this = this; axios // .get(_this.getlandRequestURL+"?area[]="+area) .get(_this.getlandRequestURL + "?area[]=" + area) .then(res => { let list = res.data.data; list.forEach(els => { let obj = []; let points = els.geometry.coordinates[0].points; //重新组装接口来的数据 points.forEach(el => { obj.push(el.coordinates); }); _this.polygonShow(els.id, map, obj); //遍历经纬度并渲染到地图上 }); }) .catch(error => { console.log(error); }); }, polygonShow(id, map, obj) { //渲染多边形和网格 判断地块是否是重新加载的 if (!this.polygons.find(p => p.toString() === id.toString())) { //渲染多边形和网格 let polygonOpt = { path: obj, //设置多边形边界路径 strokeColor: "#FF33FF", //线颜色 strokeOpacity: 0.2, //线透明度 strokeWeight: 3, //线宽 fillColor: "red", //填充色 fillOpacity: 0.4, //填充透明度 id: id, points: obj }; let polygon = new AMap.Polygon(polygonOpt); polygon.setMap(map); this.polygons.push(id); this.polygonClick(map, polygon); } }, polygonClick(map, polygon) { //点击地块获得格点数据 var _this = this; polygon.on("click", function (e) { let list = e.target.Ch.points; let areas = ""; list.forEach(el => { areas += el + ";"; }); _this.gridPolygonData(map, _this.removeLastCode(areas)); //加载geoJson }); }, gridPolygonData(map, areas) { //加载网格的数据并添加上点击事件 var _this = this; axios .get(_this.getWeatherJsonURL + "?point[]=" + areas) .then(res => { _this.weaherData = res.data.data;//获取所有天气信息 let list = res.data.data; let obj = []; list.forEach(els => { let points = els.gridPolygon.points; //重新组装接口来的数据 points.forEach(el => { obj.push(el.coordinates); }); _this.gridPolygonShow(els.id, map, obj); //遍历经纬度并渲染到地图上 }); }) .catch(error => { console.log(error); }); }, // 地图上加载天气轨迹 gridPolygonShow(id, map, obj) { var polygon = new AMap.Polygon({ path: obj, //设置多边形边界路径 strokeColor: "#FF33FF", //线颜色 strokeOpacity: 0.2, //线透明度 strokeWeight: 3, //线宽 fillColor: "#ccc", //填充色 fillOpacity: 0.2, //填充透明度 id: id, points: obj }); polygon.setMap(map);//绘制地图 map.setZoomAndCenter(this.zoom, obj[0]); //重新设置地图中心点 this.gridPolygonClick(polygon); }, // 点击地块触发的事件 gridPolygonClick(polygon) { var _this = this; polygon.on("click", function (e) { _this.loadWeatherData(e.target.Ch.id); //通过id得到当前的数据 }); }, loadWeatherData(id) { // 点击格点获取天气数据 // alert(id); var _this = this; let weatherVoList = []; let weaherData2 =[]; weaherData2.push(_this.weaherData[0]); weaherData2.forEach(els => { if (els.id == id) { weatherVoList=els.weatherForecastVoList; } }); _this.$emit('loadWeather',weatherVoList);//把得到的天气数据暴露给父组件引用 // _this.dataEmpty = false; }, removeLastCode(str) { //去掉字符串最后一位 if (str == null || str == "" || str.length < 1) { return str; } return str.substring(0, str.length - 1); } } };</script><style scoped> .v-charts-data-empty { position: absolute; top: 0; left: 40%; font-size: 16px; top: 10%; }</style>
使用方法:按照vue标准引用局部组件的方式引入即可,分别传入getlandRequestURL,getgeoJsonURL,getWeatherJsonURL,getAreaData地址。
<template> <div class="body"> <amap-weather getlandRequestURL="/data/getLand.json" getgeoJsonURL="/data/getLand.json" getWeatherJsonURL="/data/getweatherforgeo.json" getAreaData="/data/area.json" ></amap-weather> </div></template><script>import amapWeather from '../../components/amap-weather';export default { layout:'nav', components: { amapWeather }, head() { return { title: "高德地图插件" }; }, }</script><style></style>
总结
在封装高德地图组件过程中遇到最大的一个坑:nuxt路由跳转到地图页面报错,最终的解决方案是在left-nav.vue跳转方法里做判断,如果路由路径为map就刷新页面,同时利用:active-name="menuName"属性展开左侧菜单;
路由跳转报错展示
另外一个坑就是服务端渲染带来的问题,最终在mounted生命周期函数中根据process做判断是浏览器端还是服务端并做相应的处理,如代码所示
mounted() { var _this = this; if (process.browser) { _this.initMap(); _this.getData(); } }
展示的气象数据需要用到echart图表展示,这一块时间限制并没有做很好的封装,导致代码太乱,后续有时间会做优化;
乱得一批的代码
另外对于组件命名也不规范,官方推荐用amap-weather.vue这种,在做这一块的总结的时候可以看到上面的代码改过来了;
组件命名规范
作者:愿爱无忧dk_
链接:https://www.jianshu.com/p/184d67402f67