地图框架之mapbox——（五）
今天主要学习mapbox中如何使用画笔！
一、导入画笔依赖
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.js"></script>
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.css" type="text/css">二、代码实现
默认情况下所有类型画笔全部加载
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><!-- 导入依赖 --><script src='https://api.mapbox.com/mapbox-gl-js/v2.12.0/mapbox-gl.js'></script><link href='https://api.mapbox.com/mapbox-gl-js/v2.12.0/mapbox-gl.css' rel='stylesheet' /><!-- 导入依赖 --><script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.js"></script><link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.css"type="text/css"><style>* {margin: 0;padding: 0}#map {width: 100vw;height: 100vh;}</style>
</head><body><div id="map"></div><script>//tokenmapboxgl.accessToken = '你的token';const gaode = {"version": 8,"sources": {"raster-tiles": {"type": "raster","tiles": ["http://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}"],"tileSize": 256}},"layers": [{"id": "simple-tiles","type": "raster","source": "raster-tiles","minzoom": 0,"maxzoom": 22}]}const map = new mapboxgl.Map({container: 'map', // container IDstyle: gaode, // style URLcenter: [114.30, 30.50], // starting position [lng, lat]zoom: 9, // starting zoom});/* 实例化画笔 */const draw = new MapboxDraw({})/* 将画笔作为控件添加给map */map.addControl(draw, 'top-left')/* 监听画笔 */map.on("draw.create", handleDraw)function handleDraw(evt) {console.log(evt.features[0])}</script>
</body></html> const draw = new MapboxDraw({controls: {// point: false,line_string: true,polygon: false,trash: false,combine_features: false,uncombine_features: false}})通过true或false决定是否显示该画笔
三、设置画笔的模式
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><!-- 导入依赖 --><script src='https://api.mapbox.com/mapbox-gl-js/v2.12.0/mapbox-gl.js'></script><link href='https://api.mapbox.com/mapbox-gl-js/v2.12.0/mapbox-gl.css' rel='stylesheet' /><!-- 导入依赖 --><script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.js"></script><link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.2.2/mapbox-gl-draw.css"type="text/css"><style>* {margin: 0;padding: 0}#map {width: 100vw;height: 100vh;}#btn {width: 200px;height: 50px;position: fixed;top: 20px;left: 60px;z-index: 100;}#clear {width: 200px;height: 50px;position: fixed;top: 20px;left: 260px;z-index: 100;}</style>
</head><body><button id="btn" onclick="activeDraw()">激活画笔</button><button id="clear" onclick="clearDraw()">清空数据</button><div id="map"></div><script>//tokenmapboxgl.accessToken = '你的token';const gaode = {"version": 8,"sources": {"raster-tiles": {"type": "raster","tiles": ["http://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}"],"tileSize": 256}},"layers": [{"id": "simple-tiles","type": "raster","source": "raster-tiles","minzoom": 0,"maxzoom": 22}]}const map = new mapboxgl.Map({container: 'map', // container IDstyle: gaode, // style URLcenter: [114.30, 30.50], // starting position [lng, lat]zoom: 9, // starting zoom});/* 实例化画笔 */const draw = new MapboxDraw({/* 如果设置false 可以将画笔全部隐藏 */displayControlsDefault: false})/* 将画笔作为控件添加给map */map.addControl(draw, 'top-left')/* 监听画笔 */map.on("draw.create", handleDraw)function handleDraw(evt) {console.log(evt.features[0])}function activeDraw() {/* draw changeModel *//* draw_point *//* draw_line_string *//* draw_polygon */draw.changeMode("draw_polygon")}function clearDraw() {/* 删除画笔的图形 */// console.log(draw);draw.deleteAll();}</script>
</body></html>具体的有关画笔的其他内容可以参考官方文档，下面是画笔的github地址，其实掌握上面的内容基本就足够了。
GitHub - mapbox/mapbox-gl-draw: Draw tools for mapbox-gl-js
工作中一般来说需要结合turf.js使用，下面是turf.js的地址，后面有时间的话，也会给大家出一些文章讲一讲。
Turf.js中文网 | Turf.js中文网