javascript - 谷歌地图 api 在网站上不可见，但在 jsFIddle 中有效

Question

我想知道为什么在 Fiddle 中查看我的代码时没有出现错误，但在复制到我的网站时却无法查看 map 。我在控制台中看到的唯一错误是指我的 js 代码的 'function CreateMarker(obj) 行。我是 js 的新手，所以我不确定问题是什么。

控制台:“onResRdy 异常:TypeError:无法读取未定义的属性‘htmlRes’”

任何帮助弄清楚为什么 map 不显示的帮助将不胜感激，任何深入了解 jsFiddle 和我的 PROD View 之间的区别将是一个奖励。这是代码示例 jsFiddle这是我的 website

var geocoder;
var map;
var markers = Array();
var infos = Array();

function initialize() {
    // prepare Geocoder
    geocoder = new google.maps.Geocoder();

    // set initial position (New York)
    var myLatlng = new google.maps.LatLng(40.7143528,-74.0059731);

    var myOptions = { // default map options
        zoom: 12,
        center: myLatlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    map = new google.maps.Map(document.getElementById('gmap_canvas'), myOptions);
}

// clear overlays function
function clearOverlays() {
    if (markers) {
        for (i in markers) {
            markers[i].setMap(null);
        }
        markers = [];
        infos = [];
    }
}

// clear infos function
function clearInfos() {
    if (infos) {
        for (i in infos) {
            if (infos[i].getMap()) {
                infos[i].close();
            }
        }
    }
}

// find address function
function findAddress() {
    var address = document.getElementById("gmap_where").value;

    // script uses our 'geocoder' in order to find location by address name
    geocoder.geocode( { 'address': address}, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) { // and, if everything is ok

            // we will center map
            var addrLocation = results[0].geometry.location;
            map.setCenter(addrLocation);

            // store current coordinates into hidden variables
            document.getElementById('lat').value = results[0].geometry.location.lat();
            document.getElementById('lng').value = results[0].geometry.location.lng();

            // and then - add new custom marker
            var addrMarker = new google.maps.Marker({
                position: addrLocation,
                map: map,
                title: results[0].formatted_address,
                icon: 'marker.png'
            });
        } else {
            alert('Geocode was not successful for the following reason: ' + status);
        }
    });
}

// find custom places function
function findPlaces() {

    // prepare variables (filter)
    var type = document.getElementById('gmap_type').value;
    var radius = document.getElementById('gmap_radius').value;
    var keyword = document.getElementById('gmap_keyword').value;

    var lat = document.getElementById('lat').value;
    var lng = document.getElementById('lng').value;
    var cur_location = new google.maps.LatLng(lat, lng);

    // prepare request to Places
    var request = {
        location: cur_location,
        radius: radius,
        types: [type]
    };
    if (keyword) {
        request.keyword = [keyword];
    }

    // send request
    service = new google.maps.places.PlacesService(map);
    service.search(request, createMarkers);
}

// create markers (from 'findPlaces' function)
function createMarkers(results, status) {
    if (status == google.maps.places.PlacesServiceStatus.OK) {

        // if we have found something - clear map (overlays)
        clearOverlays();

        // and create new markers by search result
        for (var i = 0; i < results.length; i++) {
            createMarker(results[i]);
        }
    } else if (status == google.maps.places.PlacesServiceStatus.ZERO_RESULTS) {
        alert('Sorry, nothing is found');
    }
}

// creare single marker function
function createMarker(obj) {

    // prepare new Marker object
    var mark = new google.maps.Marker({
        position: obj.geometry.location,
        map: map,
        title: obj.name
    });
    markers.push(mark);

    // prepare info window
    var infowindow = new google.maps.InfoWindow({
        content: '<img src="' + obj.icon + '" /><font style="color:#000;">' + obj.name + 
        '<br />Rating: ' + obj.rating + '<br />Vicinity: ' + obj.vicinity + '</font>'
    });

    // add event handler to current marker
    google.maps.event.addListener(mark, 'click', function() {
        clearInfos();
        infowindow.open(map,mark);
    });
    infos.push(infowindow);
}

// initialization
google.maps.event.addDomListener(window, 'load', initialize);

#gmap_canvas {
    height: 700px;
    position: relative;
    width: 900px;
}
.actions {
    background-color: #FFFFFF;
    bottom: 30px;
    padding: 10px;
    position: absolute;
    right: 30px;
    z-index: 2;

    border-top: 1px solid #abbbcc;
    border-left: 1px solid #a7b6c7;
    border-bottom: 1px solid #a1afbf;
    border-right: 1px solid #a7b6c7;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    border-radius: 12px;
}
.actions label {
    display: block;
    margin: 2px 0 5px 10px;
    text-align: left;
}
.actions input, .actions select {
    width: 85%;
}
.button {
    background-color: #d7e5f5;
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #d7e5f5), color-stop(100%, #cbe0f5));
    background-image: -webkit-linear-gradient(top, #d7e5f5, #cbe0f5);
    background-image: -moz-linear-gradient(top, #d7e5f5, #cbe0f5);
    background-image: -ms-linear-gradient(top, #d7e5f5, #cbe0f5);
    background-image: -o-linear-gradient(top, #d7e5f5, #cbe0f5);
    background-image: linear-gradient(top, #d7e5f5, #cbe0f5);
    border-top: 1px solid #abbbcc;
    border-left: 1px solid #a7b6c7;
    border-bottom: 1px solid #a1afbf;
    border-right: 1px solid #a7b6c7;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    border-radius: 12px;
    -webkit-box-shadow: inset 0 1px 0 0 white;
    -moz-box-shadow: inset 0 1px 0 0 white;
    box-shadow: inset 0 1px 0 0 white;
    color: #1a3e66;
    font: normal 11px "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Geneva, Verdana, sans-serif;
    line-height: 1;
    margin-bottom: 5px;
    padding: 6px 0 7px 0;
    text-align: center;
    text-shadow: 0 1px 1px #fff;
    width: 150px;
}
.button:hover {
    background-color: #ccd9e8;
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ccd9e8), color-stop(100%, #c1d4e8));
    background-image: -webkit-linear-gradient(top, #ccd9e8, #c1d4e8);
    background-image: -moz-linear-gradient(top, #ccd9e8, #c1d4e8);
    background-image: -ms-linear-gradient(top, #ccd9e8, #c1d4e8);
    background-image: -o-linear-gradient(top, #ccd9e8, #c1d4e8);
    background-image: linear-gradient(top, #ccd9e8, #c1d4e8);
    border-top: 1px solid #a1afbf;
    border-left: 1px solid #9caaba;
    border-bottom: 1px solid #96a3b3;
    border-right: 1px solid #9caaba;
    -webkit-box-shadow: inset 0 1px 0 0 #f2f2f2;
    -moz-box-shadow: inset 0 1px 0 0 #f2f2f2;
    box-shadow: inset 0 1px 0 0 #f2f2f2;
    color: #163659;
    cursor: pointer;
}
.button:active {
    border: 1px solid #8c98a7;
    -webkit-box-shadow: inset 0 0 4px 2px #abbccf, 0 0 1px 0 #eeeeee;
    -moz-box-shadow: inset 0 0 4px 2px #abbccf, 0 0 1px 0 #eeeeee;
    box-shadow: inset 0 0 4px 2px #abbccf, 0 0 1px 0 #eeeeee;
}

<div id="gmap_canvas"></div>
<div class="actions">
    <div class="button">
        <label for="gmap_where">Where:</label>
        <input id="gmap_where" type="text" name="gmap_where" /></div>
    <div id="button2" class="button" onclick="findAddress(); return false;">Search for address</div>
    <div class="button">
        <label for="gmap_keyword">Keyword (optional):</label>
        <input id="gmap_keyword" type="text" name="gmap_keyword" /></div>
    <div class="button">
        <label for="gmap_type">Type:</label>
        <select id="gmap_type">
            <option value="art_gallery">art_gallery</option>
            <option value="atm">atm</option>
            <option value="bank">bank</option>
            <option value="bar">bar</option>
            <option value="cafe">cafe</option>
            <option value="food">food</option>
            <option value="hospital">hospital</option>
            <option value="police">police</option>
            <option value="store">store</option>
        </select>
    </div>
    <div class="button">
        <label for="gmap_radius">Radius:</label>
        <select id="gmap_radius">
            <option value="500">500</option>
            <option value="1000">1000</option>
            <option value="1500">1500</option>
            <option value="5000">5000</option>
        </select>
    </div>
    <input type="hidden" id="lat" name="lat" value="40.7143528" />
    <input type="hidden" id="lng" name="lng" value="-74.0059731" />
    <div id="button1" class="button" onclick="findPlaces(); return false;">Search for objects</div>
</div>

Answer 1

在您的网站中，您的“map_canvas”div 没有固定的 div(使用 position: relative 然后高度和宽度都以 100% 进行转换，因此您什么也看不到)或 map_canva div 的所有父级都没有'没有设置合适的高度
然后为所有父容器设置合适的高度

 html, body, #gmap_canvas { 
     width: 100%; 
     height: 100%; 
     margin: 0; 
     padding: 0; }

  #gmap_canvas { 
     position: relative;
   }

或者这样设置固定值

#gmap_canvas {
    height: 700px;

    width: 900px;
 }