为Leaflet解析Foursquare API JSON

Posted 2021-05-03

我正在尝试在Foursquare上提取的传单上映射JSON，但是我很难将它显示出来。

这是一个使用来自纽约开放数据的JSON的工作脚本。

fetch('complaintdata.json')
          .then(function (response) {
            // Read data as JSON
            return response.json();
          })
          .then(function (data) {
            // Create the Leaflet layer for the data
            var complaintData = L.geoJson(data, {
              pointToLayer: function (feature, latlng) {
                return L.marker(latlng, {icon: myIcon});
              },

              onEachFeature: function (feature, layer) {
                layer.on('click', function () {
                  // This function is called whenever a feature on the layer is clicked
                  console.log(layer.feature.properties);

                  // Render the template with all of the properties. Mustache ignores properties
                  // that aren't used in the template, so this is fine.
                  var sidebarContentArea = document.querySelector('.sidebar-content');
                  console.log(sidebarContentArea);
                  sidebarContentArea.innerhtml = Mustache.render(popupTemplate, layer.feature.properties);
                });
              }
            });

            // Add data to the map
            complaintData.addTo(map);

          });

这是使用谷歌地图的working example，但我很难将其转移到Leaflet。

这是JSON我想复制这个过程：

答案

首先需要获取数据然后迭代对象以构建标记和弹出内容。

您的geojson似乎不符合内置的L.geoJSON内置方法，因此迭代对象就像处理常规javascript对象一样。

也只是告诉你我用axios来获取响应。

import axios from "axios";

const url =
  "https://api.foursquare.com/v2/venues/search?near=London&categoryId=4bf58dd8d48988d14c941735&client_id=BOCHQZ4NF0D2NNFP2HM0INIKPUESPUX3RMRDUX02MPWIYSM2&client_secret=EDNX150PKLS4SMRHWL21Q0KLBAQXYQUQV5RAZI0HZSA1IYGG&v=20161111";

let geoJson = {};

axios.get(url).then(response => {
  geoJson = { ...response.data.response.venues };
  // console.log(geoJson);
  for (let key in geoJson) {
    let restaurant = geoJson[key];
    // console.log(restaurant);
    const { lat, lng, address } = restaurant.location;
    const { name } = restaurant;
    const popupContent = `<b>Name</b>: ${name} 
                          <br> <b>Address</b>: ${address}
                          <br> <b>Lat</b>: ${lat}, 
                          <br> <b>Lon</b>: ${lng} 
    `;
    L.marker([lat, lng], { icon: customMarker })
      .bindPopup(popupContent)
      .addTo(map);
  }
});

Demo