添加默认Marker

import { Marker, Popup, Scene } from '@antv/l7';
import { GaodeMap } from '@antv/l7-maps';
const scene = new Scene({
  id: 'map',
  map: new GaodeMap({
    style: 'light',
    center: [121.4316962, 31.26082325],
    zoom: 12.056,
  }),
});
scene.on('loaded', () => {
  // 创建默认 marker
  const popup = new Popup({
    offsets: [0, 20],
  }).setText('hello');

  const marker = new Marker().setLnglat([121.4316962, 31.26082325]).setPopup(popup);

  scene.addMarker(marker);
});