Question

function getCoords(position) 
{
    var longitude = position.coords.latitude;
    var latitude = position.coords.longitude;
    var coords = new google.maps.LatLng(latitude, longitude);
    alert(coords);  
    });
}

这是初始化函数，我首次需要变量coords：

function initMap() 
{ 
    map = new google.maps.Map(document.getElementById('map'), { 
        center: {lat: 22.5726, lng: 88.3639}, 
        zoom: 13 
    });  

    infoWindow = new google.maps.InfoWindow; 

    // Try HTML5 geolocation. 
    if (navigator.geolocation) { 
        navigator.geolocation.getCurrentPosition(function(position) 
        {   
            var marker = new google.maps.Marker({
                position: coords,
                map: map,
                title: "You're here Bro!",
                draggable: true,
                animation: google.maps.Animation.DROP,
            });

            infoWindow.setPosition(coords); 
            infoWindow.setContent("You're here Bro!"); 

            infoWindow.open(map , marker); 
            map.setCenter(coords); 
        }, function() { 
            handleLocationError(true, infoWindow, map.getCenter()); 
        }); 
    } else { 
        // Browser doesn't support Geolocation 
        handleLocationError(false, infoWindow, map.getCenter()); 
    } 

    new AutocompleteDirectionsHandler(map);  
}

这是初始化函数，我需要第二次变量coords

AutocompleteDirectionsHandler.prototype.route = function() {
    if (!this.destinationPlaceId) {
        return;
    }

    var me = this;

    this.directionsService.route({
        origin: coords,
        destination: {'placeId': this.destinationPlaceId},
        travelMode: this.travelMode
    }, function(response, status) {
        if (status === 'OK') {
            me.directionsDisplay.setDirections(response);
        } else {
            window.alert('Directions request failed due to ' + status);
        }
    });
};

此代码无法将coords变量传递给函数。第一个函数用于映射启动，第一个函数用于路由。

Answer 1

您正尝试在不同的范围内访问“coords”变量。也许尝试在getCoords函数之外声明它，并将其设置在其中。如下所示：

var coords = null;
function getCoords(position) 
{
var longitude = position.coords.latitude;
var latitude = position.coords.longitude;
coords = new google.maps.LatLng(latitude, longitude);
alert(coords);  
});
}

在初始化函数中无法传递lat lng

1 个答案: