openlayers打印地图的vue代码怎么写？

以下是使用OpenLayers实现地图打印的Vue代码示例：

<template>
  <div>
    <div ref="mapContainer" class="map-container"></div>
    <button @click="printMap">Print Map</button>
  </div>
</template>

<script>
import html2canvas from 'html2canvas';

export default {
  name: 'PrintMap',
  data() {
    return {
      map: null,
    };
  },
  mounted() {
    this.initMap();
  },
  methods: {
    initMap() {
      this.map = new ol.Map({
        target: this.$refs.mapContainer,
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM(),
          }),
        ],
        view: new ol.View({
          center: ol.proj.fromLonLat([120.1551, 30.2741]),
          zoom: 10,
        }),
      });
    },
    async printMap() {
      const mapContainer = this.$refs.mapContainer;
      const canvas = await html2canvas(mapContainer);
      const win = window.open();
      win.document.write(`<img src="${canvas.toDataURL('image/png')}"/>`);
      win.print();
      win.close();
    },
  },
};
</script>

<style scoped>
.map-container {
  height: 500px;
}
</style>

在上述代码中，我们通过`html2canvas`将地图容器中的内容转换成canvas，然后将canvas转换成图片，最后弹出一个新窗口并打印该图片。请注意，`html2canvas`需要进行异步处理，因此我们使用了`async/await`关键字。