Openlayers WMS-getGetFeatureInfoUrl不是函数

如何解决Openlayers WMS-getGetFeatureInfoUrl不是函数

我有一个wms图层，它在地图上显示得很好，但是当我尝试单击该图层时从该图层获取对象时，出现错误getgetfeatureinfoUrl不是函数

    var wmsSource = new TileWMS({
      url: 'http://1.1.1.1:8080/geoserver/wms',params: {'LAYERS': 'workspace:feature','TILED': true},serverType: 'geoserver',transition: 0,});
    var wmsLayer = new TileLayer({
      source: wmsSource
    })
    var view = new View({
      center: [0,0],zoom: 1,});
    if (checked) {
        map.addLayer(wmsLayer);
  }
    else {
      map.removeLayer(wmsLayer)
  }

  map.on('singleclick',function (evt) {
    var viewResolution = /** @type {number} */ (view.getResolution());
    var feature = wmsSource.getgetfeatureinfoUrl(
      evt['coordinate'],viewResolution,'epsg:3857',{'INFO_FORMAT': 'text/html'}
    );
    if (feature) {
      fetch(feature)
        .then(function (response) { return response.text(); })
        .then(function (info) {
         console.log(info);
          
        });
    }

我该怎么办？

解决方法

解决方案是从类似以下的层获取源：

map.on('singleclick',function (evt) {
    var viewResolution = /** @type {number} */ (view.getResolution());
    var feature = wmsLayer.getSource().getFeatureInfoUrl(
      evt['coordinate'],viewResolution,'EPSG:3857',{'INFO_FORMAT': 'text/html'}
    );
    if (feature) {
      fetch(feature)
        .then(function (response) { return response.text(); })
        .then(function (info) {
         console.log(info);
          
        });
    }