导航控件

TIP

点击按钮 E 缩放到指定范围。

代码如下:

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<template>
  <div ref="map_el" class="map"></div>
</template>

<script lang="ts" setup>
import { ref, onMounted, Ref, onBeforeUnmount } from "vue";
import { Map, View } from "ol";
import { defaults, ZoomToExtent } from "ol/control";
import { Tile as TileLayer } from "ol/layer";
import { XYZ } from "ol/source";
import { MAPURL, ATTRIBUTIONS } from "../../../constants";

const map_el: Ref<HTMLElement | null> = ref(null);
const raster = new TileLayer({
  source: new XYZ({
    attributions: ATTRIBUTIONS,
    url: MAPURL,
    maxZoom: 20,
  }),
});
let map: Map | null = null;
const initMap = () => {
  if (map_el.value === null) return;
  map = new Map({
    //初始化map
    target: map_el.value,
    controls: defaults({
      attributionOptions: {
        collapsible: true,
      },
    }).extend([
      new ZoomToExtent({
        extent: [
          // 坐标值
          813079.7791264898, 5929220.284081122, 848966.9639063801,
          5936863.986909639,
        ],
      }),
    ]),
    //地图容器中加载的图层
    layers: [
      //加载瓦片图层数据
      raster,
    ],
    view: new View({
      projection: "EPSG:4326", // 坐标系，有EPSG:4326和EPSG:3 857
      center: [114.064839, 22.548857], // 深圳坐标
      zoom: 12, // 地图缩放级别（打开页面时默认级别）
    }),
  });
};
onMounted(() => {
  initMap();
});

onBeforeUnmount(() => {
  if (map) {
    map.dispose();
    map = null;
  }
});
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.map {
  width: 100%;
  height: 650px;
}
</style>