微信小程序地图(map)组件点击(tap)获取经纬度

做个变通，适用性有限，请大家参考。基本思路就是在地图上铺满一层marker，从而通过点击marker获得经纬度。

<map id="map" longitude="102.324520" latitude="40.099994" scale="4"  bindcontroltap="controltap"  polygons="{
          
   {polygons}}" bindregionchange="regionchange" markers="{
          
   {markers}}" bindmarkertap="markertap" show-location style="width: 100%; height: 700px;"></map>

const app = getApp()

const markersize = 30

function range(start, edge, step) {
  for (var ret = [];
    (edge - start) * step > 0; start += step) {
    ret.push(start);
  }
  return ret;
}

function markers(northeast, southwest, scale, width, height) {

  const markerslng = (northeast.longitude - southwest.longitude) * markersize / width
  const markerslat = (northeast.latitude - southwest.latitude) * markersize / height

  const maxlon = northeast.longitude
  const minlon = southwest.longitude
  const maxlat = northeast.latitude
  const minlat = southwest.latitude

  const lons = range(minlon, maxlon, markerslng)
  const lats = range(minlat, maxlat, markerslat)

  let _markers = []
  lons.forEach((lon, i) => {
    lats.forEach((lat, j) => {
      _markers.push({
        id: lon + , + lat,
        latitude: lat,
        longitude: lon,
        iconPath: /marker.png,
        alpha: 0.1, //将图片设置为透明,通过开发者工具看不出效果,但真机是有效果的
        width: markersize,
        height: markersize
      })
    })
  })
  return _markers
}

Page({
  data: {
    polygons: [],
    controls: [{
      id: 1,
      position: {
        left: 0,
        top: 300 - 50,
        width: 50,
        height: 50
      },
      clickable: true
    }],
    markers: []
  },
  createMarkers() {

    this.mapCtx = wx.createMapContext(map)
    const query = wx.createSelectorQuery()
    const map = query.select(#map).boundingClientRect()

    let that = this

    that.mapCtx.getRegion({
      success(res1) {
        that.mapCtx.getScale({
          success(res2) {
            query.exec((res) => {
              let width = res[0].width;
              let height = res[0].height;
              let _markers = markers(res1.northeast, res1.southwest, res2.scale, width, height)
              that.data.markers = _markers
              that.setData(that.data)
            })
          }
        })
      }
    })
  },
  regionchange(e) {
    this.createMarkers()
  },
  markertap(e) {
    console.log(e.markerId)
  },
  controltap(e) {
    console.log(e.controlId)
  },
  onReady(e) {
    this.createMarkers()
  }
})

效果如图

做个变通，适用性有限，请大家参考。基本思路就是在地图上铺满一层marker，从而通过点击marker获得经纬度。 const app = getApp() const markersize = 30 function range(start, edge, step) { for (var ret = []; (edge - start) * step > 0; start += step) { ret.push(start); } return ret; } function markers(northeast, southwest, scale, width, height) { const markerslng = (northeast.longitude - southwest.longitude) * markersize / width const markerslat = (northeast.latitude - southwest.latitude) * markersize / height const maxlon = northeast.longitude const minlon = southwest.longitude const maxlat = northeast.latitude const minlat = southwest.latitude const lons = range(minlon, maxlon, markerslng) const lats = range(minlat, maxlat, markerslat) let _markers = [] lons.forEach((lon, i) => { lats.forEach((lat, j) => { _markers.push({ id: lon + , + lat, latitude: lat, longitude: lon, iconPath: /marker.png, alpha: 0.1, //将图片设置为透明,通过开发者工具看不出效果,但真机是有效果的 width: markersize, height: markersize }) }) }) return _markers } Page({ data: { polygons: [], controls: [{ id: 1, position: { left: 0, top: 300 - 50, width: 50, height: 50 }, clickable: true }], markers: [] }, createMarkers() { this.mapCtx = wx.createMapContext(map) const query = wx.createSelectorQuery() const map = query.select(#map).boundingClientRect() let that = this that.mapCtx.getRegion({ success(res1) { that.mapCtx.getScale({ success(res2) { query.exec((res) => { let width = res[0].width; let height = res[0].height; let _markers = markers(res1.northeast, res1.southwest, res2.scale, width, height) that.data.markers = _markers that.setData(that.data) }) } }) } }) }, regionchange(e) { this.createMarkers() }, markertap(e) { console.log(e.markerId) }, controltap(e) { console.log(e.controlId) }, onReady(e) { this.createMarkers() } }) 效果如图