如何在JavaScript上显示警报，当GoogleMaps/StreetView它不适用于某个位置时 - How to show an alert on JavaScript , when GoogleMaps/StreetView it's not available for a location?

How to show an alert on JavaScript , when GoogleMaps/StreetView it's not available for a location?

我正在为我的网页使用Google地图/街景选项。但是当街景在某些位置不可用时，它只是变灰 .

我想在 JavaScript 的街景不可用时显示警报。

 function initialize(imei) {
  $.ajax(
{
               dataType: "json",
url: "index.php/application/getcordinatesgoogle/" + imei,

}).done(function( response ) {
   var cafe = new google.maps.LatLng(response.y,response.x);
   var panoramaOptions = {
     position: cafe,
     pov: {
       heading: 270,
       pitch: 0
     },
     visible: true
   };

   var panorama = new google.maps.StreetViewPanorama(document.getElementById('pano'), panoramaOptions);


});

当没有可用数据时，它不会显示任何警报。

您可以使用

街景服务类的getPanoramaByLocation方法。

panoramaService = new google.maps.StreetViewService();
runPanoramaService(new google.maps.LatLng(0, 0), 1000);
function runPanoramaService(location, radius) {
    panoramaService.getPanoramaByLocation(location,
    radius,
    function (streetViewPanoramaData, streetViewStatus) {
        if (streetViewStatus == "OK") {      
            alertPanoAvailable(true);
        } else {
            alertPanoAvailable(false);
        }
    });
}
function alertPanoAvailable(val) {
    // Do what you want here val will be either true or false
    console.log('panorama available?', val);
}