这是我在我的网页上构建谷歌地图的方式:
var initialize = function(latitude, longitude, boundaries) {
// Uses the selected lat, long as starting point
var myLatLng = {lat: selectedLat, lng: selectedLong};
// If map has not been created...
if (!map){
// Create a new map and place in the index.html page
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 12,
center: myLatLng
});
}
if(boundaries.length > 0){
//we don't have a permission for using real GPS of the user
var bounds = new google.maps.LatLngBounds(
new google.maps.LatLng(boundaries[0], boundaries[1]),
new google.maps.LatLng(boundaries[2], boundaries[3]) );
map.fitBounds(bounds);
}else{
//we have a permission, let's mark his location with a marker
// Set initial location as a bouncing red marker
var initialLocation = new google.maps.LatLng(latitude, longitude);
var marker = new google.maps.Marker({
position: initialLocation,
animation: google.maps.Animation.BOUNCE,
map: map,
icon: 'http://www.google.com/mapfiles/dd-start.png'//'http://maps.google.com/mapfiles/ms/icons/red-dot.png'
});
//lastMarker = marker;
}
refreshDataOnMap(longitude, latitude, map);
正如您所见,我尝试将创建的地图传递给refreshDataOnMap
方法:
var refreshDataOnMap = function(long, lat, mymap) {
console.log("refresh!!");
var calculatedDistance = calculateRadiusInMiles(mymap);
}
此方法调用calculateRadiusInMiles
:
// get the viewable map radius
var calculateRadiusInMiles = function(map){
var bounds = map.getBounds();
var center = bounds.getCenter();
var ne = bounds.getNorthEast();
// r = radius of the earth in statute miles
var r = 3963.0;
// Convert lat or lng from decimal degrees into radians (divide by 57.2958)
var lat1 = center.lat() / 57.2958;
var lon1 = center.lng() / 57.2958;
var lat2 = ne.lat() / 57.2958;
var lon2 = ne.lng() / 57.2958;
// distance = circle radius from center to Northeast corner of bounds
var dis = r * Math.acos(Math.sin(lat1) * Math.sin(lat2) +
Math.cos(lat1) * Math.cos(lat2) * Math.cos(lon2 - lon1));
return dis;
};
我的控制台中的结果显示:
刷新!!
angular.js:12520 TypeError:无法读取属性'getCenter' 未定义 在calculateRadiusInMiles(gservice.js:112) 在refreshDataOnMap(gservice.js:48) 初始化时(gservice.js:214) 在Object.googleMapService.refresh(gservice.js:36) 在对象。 (gservice.js:225) at Object.invoke(angular.js:4523) at Object.enforcedReturnValue [as $ get](angular.js:4375) at Object.invoke(angular.js:4523) 在angular.js:4340 在getService(angular.js:4482)(匿名函数)@ angular.js:12520(匿名函数)@ angular.js:9292Scope。$ apply @ angular.js:16157bootstrapApply @ angular.js:1679invoke @ angular.js:4523doBootstrap @ angular.js:1677bootstrap @ angular.js:1697angularInit @ angular.js:1591(匿名函数)@ angular.js:29013fire @ jquery.js:3182self.fireWith @ jquery.js:3312jQuery.extend.ready @ jquery.js:3531completed @ 的jquery.js:3547
刷新!!
因此我无法正确使用我页面上的地图。我不知道这里可能有什么问题,对我而言,在我尝试调用其属性之后看起来地图加载了,但是 - 如果这是正确的 - 我该如何防止它?
由于
EDIT ===========
这里有一个细节,因为它可能有助于调试此问题:
我加载谷歌地图并根据用户的IP地址居中,但是当浏览器检测到gps数据时,地图会重新加载并指向特定的gps点。这就是为什么在我的console.log中你可以看到refresh!!!
两次
答案 0 :(得分:0)
必须是bounds
未定义,因此map
尚未生效。您是否已将map
传递给calculateRadiusInMiles()
?你检查过bounds
了吗?地图已经加载了吗?
Google Maps Api v3 - getBounds is undefined
编辑勺子:
看起来v3中的事件确实如此:
`google.maps.event.addListener(map, 'bounds_changed', function() {
alert(map.getBounds());
});
或
`google.maps.event.addListener(map, 'idle', function() {
alert(map.getBounds());
});