不推荐cnpm(建议使用npm模块)创建项目
1. 创建项目
为你的项目创建一个新的空目录,然后通过运行导航到该目录mkdir new-project && cd new-project。使用初始化项目。(新建目录直接拖到vscode,然后ctrl+~打开控制台)
npm init
2. 加载ol模块
npm install ol
3. 添加运行依赖
npm install --save-dev parcel-bundler
4. 创建index.html和main.js
代码可以直接copy官网例子官网例子
- index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Draw and Modify Features</title>
<style>
.map {
width: 100%;
height:400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<form class="form-inline">
<label for="type">Geometry type </label>
<select id="type">
<option value="Point">Point</option>
<option value="LineString">LineString</option>
<option value="Polygon">Polygon</option>
<option value="Circle">Circle</option>
</select>
</form>
<script src="main.js"></script>
</body>
</html>
- main.js
import 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style';
import {Draw, Modify, Snap} from 'ol/interaction';
import {OSM, Vector as VectorSource} from 'ol/source';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer';
var raster = new TileLayer({
source: new OSM(),
});
var source = new VectorSource();
var vector = new VectorLayer({
source: source,
style: new Style({
fill: new Fill({
color: 'rgba(255, 255, 255, 0.2)',
}),
stroke: new Stroke({
color: '#ffcc33',
width: 2,
}),
image: new CircleStyle({
radius: 7,
fill: new Fill({
color: '#ffcc33',
}),
}),
}),
});
var map = new Map({
layers: [raster, vector],
target: 'map',
view: new View({
center: [-11000000, 4600000],
zoom: 4,
}),
});
var modify = new Modify({source: source});
map.addInteraction(modify);
var draw, snap; // global so we can remove them later
var typeSelect = document.getElementById('type');
function addInteractions() {
draw = new Draw({
source: source,
type: typeSelect.value,
});
map.addInteraction(draw);
snap = new Snap({source: source});
map.addInteraction(snap);
}
/**
* Handle change event.
*/
typeSelect.onchange = function () {
map.removeInteraction(draw);
map.removeInteraction(snap);
addInteractions();
};
addInteractions();
5. 修改package.json 添加运行环境
{
"name": "ol-gas",
"version": "1.0.0",
"description": "",
"main": "main.js",
"dependencies": {
"ol": "^6.5.0",
"parcel-bundler": "^1.12.5"
},
"devDependencies": {},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "parcel index.html",
"build": "parcel build --public-url . index.html"
},
"author": "",
"license": "ISC"
}
6. 运行开发环境
npm start
浏览器输入localhost:1234可查看显示结果
7. 打包生产环境
npm run build
- 将dist/文件夹复制到生产服务器