面向对象02：构造器详解

<map
      id="map"
      class="map"
      :latitude="latitude"
      :longitude="longitude"
      :show-location="true"
      :markers="covers"
      :scale="18"
      @markertap="handleShowCard"
      :enable-building="true"
    >
      <cover-view slot="callout">
        <block v-for="(item, ItemIndex) in covers" :key="item.id">
          <cover-view class="markersContent" :marker-id="item.id">
          </cover-view>
        </block>
      </cover-view>
      <cover-view></cover-view>
    </map>

数据：