vue3.x 中使用 ol （openlayer）地图

# 安装依赖

npm install ol --save

# 简单引用

import Map from 'ol/Map';
import View from 'ol/View';
import TileLayer from 'ol/layer/Tile';
import XYZ from 'ol/source/XYZ';
new Map({
  target: 'map',
  layers: [
    new TileLayer({
      source: new XYZ({
        url: 'https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'
      })
    })
  ],
  view: new View({
    center: [0, 0],
    zoom: 2
  })
});

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# 示例代码

<template>
  <div id="map"></div>
</template>
<script setup>
import {
  defineExpose,
  ref,
  getCurrentInstance,
  nextTick,
  onMounted,
  reactive,
} from "vue";
import "ol/ol.css";
import { Feature, View, Map } from "ol";
import Circle from "ol/geom/Circle";
import Polygon from "ol/geom/Polygon";
import { Circle as CircleStyle, Fill, Stroke, Style, Text } from "ol/style";
import { Cluster, OSM, Vector as VectorSource } from "ol/source";
import { Tile as TileLayer, Vector as VectorLayer } from "ol/layer";
import { boundingExtent } from "ol/extent";
import { fromLonLat } from "ol/proj";

// console.log(geom);
const circleFeature = new Feature({
  geometry: new Circle([12127398.797692968, 4063894.123105166], 50),
});

circleFeature.setStyle(
  new Style({
    fill: new Fill({
      color: "#000",
    }),
    // renderer(coordinates, state) {
    //   console.log(coordinates, state);
    //   const [[x, y], [x1, y1]] = coordinates;
    //   const ctx = state.context;
    //   const dx = x1 - x;
    //   const dy = y1 - y;
    //   const radius = Math.sqrt(dx * dx + dy * dy);

    //   const innerRadius = 0;
    //   const outerRadius = radius * 1.4;
    //   const gradient = ctx.createRadialGradient(
    //     x,
    //     y,
    //     innerRadius,
    //     x,
    //     y,
    //     outerRadius
    //   );
    //   gradient.addColorStop(0, "rgba(255,0,0,0)");
    //   gradient.addColorStop(0.6, "rgba(255,0,0,0.2)");
    //   gradient.addColorStop(1, "rgba(255,0,0,0.8)");
    //   ctx.beginPath();
    //   ctx.arc(x, y, radius, 0, 2 * Math.PI, true);
    //   ctx.fillStyle = gradient;
    //   ctx.fill();

    //   ctx.arc(x, y, radius, 0, 2 * Math.PI, true);
    //   ctx.strokeStyle = "rgba(255,0,0,1)";
    //   ctx.stroke();
    // },
  })
);

circleFeature.on("click", (e) => {
  console.log(e);
});

// 交互层
const clusters = new VectorLayer({
  source: new VectorSource({
    features: [circleFeature],
  }),
});

// 地图层
const raster = new TileLayer({
  background: "#fff",
  source: new OSM(),
});

const initMap = () => {
  const map = new Map({
    target: "map",
    layers: [raster, clusters],
    view: new View({
      center: [12127398.797692968, 4063894.123105166],
      zoom: 16,
    }),
  });
  map.on("click", (evt) => {
    clusters.getFeatures(evt.pixel).then(function (features) {
      const feature = features.length ? features[0] : undefined;
      console.log(feature);
    });
  });
  map.on("pointermove", function (evt) {
    if (evt.dragging) {
      return;
    }
    // const pixel = clusters.getEventPixel(evt.originalEvent);
  });
};

onMounted(() => {
  initMap();
});
</script>

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# 参考地址

GitHub：https://github.com/openlayers/openlayers
官网：https://openlayers.org

#Vue

上次更新: 2024/01/30, 00:35:17

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