javascript - 谷歌地图没有完全加载

Question

这是我的代码

<script src="https://maps.google.com/maps/api/js?sensor=false&libraries=places" type="text/javascript"></script>
<script> 
    function initialize() {
        var myLatlng = new google.maps.LatLng(-33.8688, 151.2195);
        var mapOptions = {
            center: new google.maps.LatLng(-33.8688, 151.2195),
            zoom: 17,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById('map_auto'), mapOptions);

        var input = document.getElementById('event_input_auto');
        var autocomplete = new google.maps.places.Autocomplete(input);

        autocomplete.bindTo('bounds', map);

        var infowindow = new google.maps.InfoWindow();
        marker = new google.maps.Marker({
            position: myLatlng, 
            map: map
        });

        /*new added*/
        google.maps.event.addListener(map, 'center_changed', function() {
            var location = map.getCenter();
            //new added
            placeMarker(location);
            displayLocation(location.lat(),location.lng());

        });
        google.maps.event.addListener(map, 'zoom_changed', function() {
            zoomLevel = map.getZoom();      
        });
        google.maps.event.addListener(marker, 'dblclick', function() {
            zoomLevel = map.getZoom()+1;
            if (zoomLevel == 20) {
                zoomLevel = 10;
            }
            map.setZoom(zoomLevel);

        });


        /*new added*/


        google.maps.event.addListener(autocomplete, 'place_changed', function() {
            $('#map_holder').show();
            google.maps.event.addListenerOnce(map, 'idle', function(){
                google.maps.event.trigger(map, 'resize');
                map.setCenter(location);
            });


            infowindow.close();
            var place = autocomplete.getPlace();
            if (place.geometry.viewport) {
              map.fitBounds(place.geometry.viewport);
            } else {
              map.setCenter(place.geometry.location);
              map.setZoom(17);  // Why 17? Because it looks good.
            }
            //alert(autocomplete.getBounds());
            var image = new google.maps.MarkerImage(
                place.icon, new google.maps.Size(71, 71),
                new google.maps.Point(0, 0), new google.maps.Point(17, 34),
                new google.maps.Size(35, 35));
            marker.setIcon(image);
            marker.setPosition(place.geometry.location);

            var address = '';
            if (place.address_components) {
              address = [
                (place.address_components[0] &&
                 place.address_components[0].short_name || ''),
                (place.address_components[1] &&
                 place.address_components[1].short_name || ''),
                (place.address_components[2] &&
                 place.address_components[2].short_name || '')].join(' ');
            }

            infowindow.setContent('<div><b>' + place.name + '</b><br>' + address);
            infowindow.open(map, marker);
        });

        // Sets a listener on a radio button to change the filter type on Places
        // Autocomplete.
        var setupClickListener = function(id, types) {
        var radioButton = document.getElementById(id);
        google.maps.event.addDomListener(radioButton, 'click', function() {
          autocomplete.setTypes(types);
        });
        }

        setupClickListener('changetype-all', []);
        //setupClickListener('changetype-establishment', ['establishment']);
        //setupClickListener('changetype-geocode', ['geocode']);
    }
google.maps.event.addDomListener(window, 'load', initialize);

function placeMarker(location) {    
    var clickedLocation = new google.maps.LatLng(location);
    marker.setPosition(location);
}

function displayLocation(latitude,longitude){
    var request = new XMLHttpRequest();

    var method = 'GET';
    var url = 'http://maps.googleapis.com/maps/api/geocode/json?latlng='+latitude+','+longitude+'&sensor=true';
    var async = true;

    request.open(method, url, async);
    request.onreadystatechange = function(){
      if(request.readyState == 4 && request.status == 200){
        var data = JSON.parse(request.responseText);
        var address = data.results[0];
        //document.write(address.formatted_address);
        document.getElementById("event_input_auto").value = address.formatted_address;
      }
    };
    request.send();
};


</script>

<input type="text" name="location" class="input-xxlarge required" id="event_input_auto" value="" />
<div id="map_holder" style="display: none;">
<div id="map_auto" style="height: 300px; width: 800px;" ></div>
</div>

当 #map_holder 为 display:block 时 map 完全加载

但是我需要在 #map_holder 为 display:none 时加载 map 。这是我的要求。

我必须做什么才能完全加载 map ？？

Answer 1

来自文档

resize - Developers should trigger this event on the map when the div changes size: google.maps.event.trigger(map, 'resize').

所以在将显示更改为 block 后尝试 google.maps.event.trigger(map, 'resize')