宣传单:未找到地图容器

时间:2017-03-07 11:58:20

标签: javascript reactjs leaflet react-leaflet

我有以下反应类,它通过浏览器获取地理位置。

我正在映射传单地图。我想将地理定位作为setView的输入,以便地图"缩放"进入客户端浏览器位置的区域。

这里是反应类:

    import React from 'react';
    import L from 'leaflet';
    import countries from './countries.js'; 

    var Worldmap = React.createClass({

        render: function() {

            let geolocation = [];

            navigator.geolocation.getCurrentPosition(function(position) {
                let lat = position.coords.latitude;
                let lon = position.coords.longitude;
                geolocation.push(lat, lon);
                locationCode()
            });

            function locationCode() {
                if(geolocation.length <= 0)
                    geolocation.push(0, 0);
            }


            let map = L.map('leafletmap').setView(geolocation, 3);

            L.geoJSON(countries, {
                style: function(feature) {
                    return {
                        fillColor: "#FFBB78",
                        fillOpacity: 0.6,
                        stroke: true,
                        color: "black",
                        weight: 2
                    };
                }
            }).bindPopup(function(layer) {
                return layer.feature.properties.name;
            }).addTo(map);

            return (
                <div id="leafletmap" style={{width: "100%", height: "800px" }}/>
            )
        }
    });

    export default Worldmap

在主文件中调用它,其中HTML呈现为<WorldMap />

加载页面时出现错误Uncaught Error: Map container not found.。环顾四周,通常是因为地图试图在提供值之前显示在div中(在这种情况下为(gelocation,3))。但是,在从下面的渲染函数返回之前,它不应该显示它。

问题是什么?

正确打印控制台中的geolocation获取坐标,这似乎不是问题所在。

5 个答案:

答案 0 :(得分:42)

<div id="leafletmap">必须添加到dom 之前调用L.map('leafletmap')

答案 1 :(得分:4)

除了@ IvanSanchez的回复,您可以将地理位置和L.map(...)代码添加到componentDidMount()React生命周期方法(取决于您希望实现的其他目标)。您还可以为找到的位置创建和绑定事件处理程序。

必须添加这种方式,dom和传单可以找到它。

如果目前还不清楚,请尽快为此提供帮助。

答案 2 :(得分:1)

如果您使用Angular,希望对您有所帮助:

const container = document.getElementById('map')
if(container) {
    // code to render map here...
}

答案 3 :(得分:1)

我在反应上遇到了同样的问题我通过在 useEeffect 的顶部初始化解决了它 这是我的 React 代码。

  const  mapContainerRef = useRef(null), 
  useEffect( async () => {
  const res =await Axios.get(BASE_PATH + 'fetchProperty')

  const container = L.DomUtil.get(mapContainerRef.current); if(container != null){ container._leaflet_id = null; }

  if(container) {


  const mapView = L.map( mapContainerRef.current, {
    zoom: 13,
    center: [19.059984, 72.889999]
    //  maxZoom: 13
    // minZoom: 15
  });
  // const canvas = mapView.getCanvasContainer();
  mapView.zoomControl.setPosition("bottomright");
  mapView.attributionControl.addAttribution(
    "<a href='https://mascots.pro'>Mascots. pro</a>"
  );
  L.tileLayer(
    // "https://api.mapbox.com/styles/v1/mapbox/dark-v9/tiles/{z}/{x}/{y}?access_token=" + https://api.mapbox.com/styles/v1/anonymousmw/cko1eb1r20mdu18qqtps8i03p/tiles/{z}/{x}/{y}?access_token=
    "https://api.mapbox.com/styles/v1/mapbox/dark-v9/tiles/{z}/{x}/{y}?access_token=" +
      access_token,
    {
      attribution: '<a href="http://mascots.work">Mascots</a>'
    }
  ).addTo(mapView);

  const mask = L.tileLayer.mask(
    "https://api.mapbox.com/styles/v1/anonymousmw/cko1eb1r20mdu18qqtps8i03p/tiles/{z}/{x}/{y}?access_token=" +
      access_token,
    {
      attribution: '<a href="https://mascots.pro">Mascots pro</a>',
      maskSize: 300
      // maxZoom: 18,
      // maxNativeZoom: 16
      // tms: true
    }
  )
  .addTo(mapView);

  mapView.on("mousemove", function (e) {
    mask.setCenter(e.containerPoint);
  });
  res.data.map((marker) => {
  
    const innerHtmlContent = `<div id='popup-container' class='popup-container'> <h3> Property Details</h3>
    <div class='popup-label'>Building Name :<p>${marker.Building}</p></div>
    <div class='popup-address-label'> Address : <p>${marker.Landmark}, ${marker.Location}</p></div>
    <div class='popup-rent-label'>Monthly Rent : <p> ₹ ${marker.Price}</p></div>
    </div>`;
    const divElement = document.createElement("div");
    const assignBtn = document.createElement("div");
    assignBtn.className = "map-link";
    assignBtn.innerHTML = `<button class="view-btn">View Property</button>`;
    divElement.innerHTML = innerHtmlContent;
    divElement.appendChild(assignBtn);
    assignBtn.addEventListener("click", (e) => {
      console.log("dsvsdvb");
    });
    var iconOptions = {
      iconUrl: "/images/location_pin2.svg",
      iconSize: [25, 25]
    };
    var customIcon = L.icon(iconOptions);

    // create popup contents
    var customPopup = divElement;

    // specify popup options
    var customOptions = {
      maxWidth: "500",
      className: "custom"
    };

    const markerOptions = {
      // title: "MyLocation",
      //    draggable: true
      clickable: true,
      icon: customIcon
    };
    const mark = L.marker([marker.Latitude,marker.Longitude], markerOptions);
    mark.bindPopup(customPopup, customOptions);
    mark.addTo(mapView);
    // return mapView.off();
   
  });
  return () => mapView.remove();
}
}, [])

return (
  <div className="map-box">
        <div className="map-container" ref={mapContainerRef}></div>
    </div>
);

}

答案 4 :(得分:0)

在 Angular 中,我必须将它放在 ngAfterViewInit 中,如下所示:

ngAfterViewInit() {
    this.mymap = L.map('mapid').setView([51.505, -0.09], 13);
}

在我的“view.component.ts”导出类中是这个