javascript - 如何在 Google map 中添加我的位置按钮？

Question

我想知道是否可以将我的位置按钮添加为默认控件选项。

有什么方法可以将其设置为默认位置，或者我需要制作带有地理位置的按钮，然后触发该按钮上的点击事件，以便将用户导航到当前位置？

Answer 1

正如@Praveen 所说，您必须自己完成。这是一段添加“您的位置”按钮的代码。 JS fiddle link

HTML

<div id="map">Map will be here</div>

CSS

#map {width:100%;height: 400px;}

JS

var map;
var faisalabad = {lat:31.4181, lng:73.0776};

function addYourLocationButton(map, marker) 
{
    var controlDiv = document.createElement('div');

    var firstChild = document.createElement('button');
    firstChild.style.backgroundColor = '#fff';
    firstChild.style.border = 'none';
    firstChild.style.outline = 'none';
    firstChild.style.width = '28px';
    firstChild.style.height = '28px';
    firstChild.style.borderRadius = '2px';
    firstChild.style.boxShadow = '0 1px 4px rgba(0,0,0,0.3)';
    firstChild.style.cursor = 'pointer';
    firstChild.style.marginRight = '10px';
    firstChild.style.padding = '0px';
    firstChild.title = 'Your Location';
    controlDiv.appendChild(firstChild);

    var secondChild = document.createElement('div');
    secondChild.style.margin = '5px';
    secondChild.style.width = '18px';
    secondChild.style.height = '18px';
    secondChild.style.backgroundImage = 'url(https://maps.gstatic.com/tactile/mylocation/mylocation-sprite-1x.png)';
    secondChild.style.backgroundSize = '180px 18px';
    secondChild.style.backgroundPosition = '0px 0px';
    secondChild.style.backgroundRepeat = 'no-repeat';
    secondChild.id = 'you_location_img';
    firstChild.appendChild(secondChild);

    google.maps.event.addListener(map, 'dragend', function() {
        $('#you_location_img').css('background-position', '0px 0px');
    });

    firstChild.addEventListener('click', function() {
        var imgX = '0';
        var animationInterval = setInterval(function(){
            if(imgX == '-18') imgX = '0';
            else imgX = '-18';
            $('#you_location_img').css('background-position', imgX+'px 0px');
        }, 500);
        if(navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(function(position) {
                var latlng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
                marker.setPosition(latlng);
                map.setCenter(latlng);
                clearInterval(animationInterval);
                $('#you_location_img').css('background-position', '-144px 0px');
            });
        }
        else{
            clearInterval(animationInterval);
            $('#you_location_img').css('background-position', '0px 0px');
        }
    });

    controlDiv.index = 1;
    map.controls[google.maps.ControlPosition.RIGHT_BOTTOM].push(controlDiv);
}

function initMap() {
    map = new google.maps.Map(document.getElementById('map'), {
        zoom: 15,
        center: faisalabad
    });
    var myMarker = new google.maps.Marker({
        map: map,
        animation: google.maps.Animation.DROP,
        position: faisalabad
    });
    addYourLocationButton(map, myMarker);
}

$(document).ready(function(e) {
    initMap();
});