聲明失敗：無效：setMap：不是地圖的一個實例

我是JS和google api的新手。去年我開發了一個自定義谷歌地圖。基本上它會從xml加載多邊形構建輪廓，然後爲某些興趣點應用kml圖層（非常感謝geocodezip在正確的方向指向我）以下是加載kml圖層功能的工作測試版，該功能停止工作。 devbox 聲明失敗：無效：setMap：不是地圖的一個實例

但現在我要求它有一個搜索框，我用searchbox重建它，但現在加載kml層不起作用，我看到錯誤聲明失敗：InvalidValueError：setMap：not an instance的地圖。

<!DOCTYPE html> 
<html> 
    <head> 
    <title>Place Autocomplete</title> 
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no"> 
    <meta charset="utf-8"> 
    <link rel="stylesheet" type="text/css" href="../maps.css"> 
    <style> 
    html, body { 
     height: 100%; 
     margin: 0; 
     padding: 0; 
     } 
     #map { 
     height: 100%; 
     width: 800px; 
     float: right; 
     margin: 0; 
     padding: 0; 
     /* height: 840px; */ 
     width: 939px; 
     /*height: 700px; 
    width: 700px;*/ 
     position: relative; 
     overflow: hidden; 
     transform: translateZ(0px); 
     background-color: rgb(229, 227, 223); 
    border: 1px solid #8a8c8f 
     } 
.controls { 
    margin-top: 10px; 
    border: 1px solid transparent; 
    border-radius: 2px 0 0 2px; 
    box-sizing: border-box; 
    -moz-box-sizing: border-box; 
    height: 32px; 
    outline: none; 
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3); 
} 

#pac-input { 
    background-color: #fff; 
    font-family: Roboto; 
    font-size: 15px; 
    font-weight: 300; 
    margin-left: 12px; 
    padding: 0 11px 0 13px; 
    text-overflow: ellipsis; 
    width: 300px; 
} 

#pac-input:focus { 
    border-color: #4d90fe; 
} 

.pac-container { 
    font-family: Roboto; 
} 

#type-selector { 
    color: #fff; 
    background-color: #4d90fe; 
    padding: 5px 11px 0px 11px; 
} 

#type-selector label { 
    font-family: Roboto; 
    font-size: 13px; 
    font-weight: 300; 
} 
.instructions { 
    height: 100%; 
} 
.top { 
    width: 100%;  
} 

    </style> 
<script type="text/javascript" src="https://maps.google.com/maps/api/js?sensor=false"></script> 
     <script type="text/javascript" src="geoxml3.js"></script> 
<script type="text/javascript" src="ProjectedOverlay.js"></script> 

    </head> 
    <body> 
    <!-- Header Container --> 
    <div class="top"> 
    <div class="header"> 
     <div class="headerLogo"> 
      <a href="http://camosun.ca"></a> 
     </div> 
     <div class="headerTitle"> 
      <a href="/maps/"></a> 
     </div> 

    </div> 
    </div> 
<!-- header div --> 
    <section class="instructions"> 
<h1>Interurban Campus</h1> 
<p>Test to create a custom Interurban campus map.</p> 
<aside class="functions"> 
<!-- begin - MAP LAYERS CHECKBOXES --> 
<h3>Points of Interest</h3> 
<form action="" method="post"> 
<input name="checkbox" alt="Parking checkbox" onClick="boxclick(this,4)" type="checkbox" value="checkbox" > Parking<br> 
<input name="checkbox" alt="Parking checkbox" onClick="boxclick(this,5)" type="checkbox" value="checkbox" > Foodservices<br> 
<input name="checkbox" alt="Parking checkbox" onClick="boxclick(this,6)" type="checkbox" value="checkbox" > Bookstore<br> 
<input name="checkbox" alt="Emergency Phones checkbox" onClick="boxclick(this,3)" type="checkbox" value="checkbox" > Bike Racks<br> 
<input name="checkbox" alt="Road Closure checkbox" onClick="boxclick(this,8)" type="checkbox" value="checkbox" > ATM<br> 
<input name="checkbox" alt="Construction checkbox" onClick="boxclick(this,7)" type="checkbox" value="checkbox" > Coffee<br> 
<input name="checkbox" alt="Bike Routes checkbox" onClick="boxclick(this,1)" type="checkbox" value="checkbox" > Bike Routes<br> 
<input name="checkbox" alt="Traffic checkbox" onClick="boxclick(this,2)" type="checkbox" value="checkbox"> Traffic<br> 
<input name="checkbox" alt="Library checkbox" onClick="boxclick(this,9)" type="checkbox" value="checkbox"> Library</p> 
</form>  
<!-- end - MAP LAYERS CHECKBOXES --> 


<!-- begin - Unordered list of locations --> 
<h3>Locations</h3>    
<div id="sidebar"></div> 

</aside> 
</section> 
<script type="text/javascript"> 

/* *** begin - KML LAYERS *** */ 
// Random number generated for cache-busting 
var seconds = new Date().getTime(); 
// Google Bike & Traffic Layers 
var bikeLayer = new google.maps.BicyclingLayer(); 
var trafficLayer = new google.maps.TrafficLayer(); 
// Variables set to URLs of custom KML layers made in Google Earth 
var bikeRacksLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/bike-racks-iu.kml'); 
var parkingLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/parking-iu.kml');    
var foodservicesLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/foodservices-iu.kml'); 
var bookstoreLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/bookstore-iu.kml');  
var coffeeLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/coffee-iu.kml'); 
var atmLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/atm-iu.kml');  
var libraryLayer = new google.maps.KmlLayer('https://webservices.camosun.bc.ca/maps-demo/_data/library-iu.kml');  
// Switch loop to toggle layers on and off 
function boxclick(box,num) { 
    switch (num) 
     { 
      case 1: 
       if (box.checked) 
        {bikeLayer.setMap(map.getMap());} 
       else {bikeLayer.setMap(null);} 
       break; 
      case 2: 
       if (box.checked) 
        {trafficLayer.setMap(map);} 
       else {trafficLayer.setMap(null);} 
       break; 
      case 3: 
       if (box.checked) 
        {bikeRacksLayer.setMap(map);} 
       else {bikeRacksLayer.setMap(null);} 
       break; 
      case 4: 
       if (box.checked) 
        {parkingLayer.setMap(map)} 
       else {parkingLayer.setMap(null);} 
       break; 
      case 5: 
       if (box.checked) 
        {foodservicesLayer.setMap(map);} 
       else {foodservicesLayer.setMap(null);} 
       break; 
      case 6: 
       if (box.checked) 
        {bookstoreLayer.setMap(map);} 
       else {bookstoreLayer.setMap(null);} 
       break; 
      case 7: 
       if (box.checked) 
        {coffeeLayer.setMap(map);} 
       else {coffeeLayer.setMap(null);} 
       break; 
      case 8: 
       if (box.checked) 
        {atmLayer.setMap(map);} 
       else {atmLayer.setMap(null);} 
       break;  
      case 9: 
       if (box.checked) 
        {libraryLayer.setMap(map);} 
       else {libraryLayer.setMap(null)} 
       break; 
      } //Switch 

    } // funtion 
    /* *** end - KML Layers *** */ 

</script> 


    <input id="pac-input" class="controls" type="text" 
     placeholder="Enter a location"> 
    <div id="type-selector" class="controls"> 
     <input type="radio" name="type" id="changetype-all" checked="checked"> 
     <label for="changetype-all">All</label> 

     <input type="radio" name="type" id="changetype-establishment"> 
     <label for="changetype-establishment">Establishments</label> 

     <input type="radio" name="type" id="changetype-address"> 
     <label for="changetype-address">Addresses</label> 

     <input type="radio" name="type" id="changetype-geocode"> 
     <label for="changetype-geocode">Geocodes</label> 
    </div> 
    <div id="map"></div> 

    <script> 
function initMap() { 
    var map = new google.maps.Map(document.getElementById('map'), { 
    center: {lat: 48.490802, lng: -123.416497}, 
    zoom: 17 
    }); 

    // array of styles 
    var styles = [ 
     { 
      "featureType": "poi.school", 
      "elementType": "labels", 
      "stylers": [{ "visibility": "off" }] 
     },{ 
      "featureType": "poi.business", 
      "elementType": "labels", 
      "stylers": [{ "visibility": "off" }] 
     },{ 
      "featureType": "landscape.man_made", 
      "elementType": "labels.text", 
      "stylers": [{ "visibility": "off" }] 
     },{ 
      "featureType": "landscape.man_made", 
      "elementType": "geometry", 
      "stylers": [{ "visibility": "off" }] 
     }]; 
// new styledMapType object, passing the array of styles and the name to be displayed on the map type control. 
    var styledMap = new google.maps.StyledMapType(styles,{name: "Styled Map"}); 
    map.mapTypes.set('map_style', styledMap); 
    map.setMapTypeId('map_style'); 

    // Sets geoxml class options 
    geoXml = new geoXML3.parser({ 
      map: map, 
      singleInfoWindow: true, 
      afterParse: useTheData 
       }); 
    geoXml.parse('interurb.xml'); 

     // sets the min and max zoom levels of the map 
    var opt = { minZoom: 6, maxZoom: 18 }; 
    map.setOptions(opt); 

    var input = /** @type {!HTMLInputElement} */(
     document.getElementById('pac-input')); 

    var types = document.getElementById('type-selector'); 
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(input); 
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(types); 

    var autocomplete = new google.maps.places.Autocomplete(input); 
    autocomplete.bindTo('bounds', map); 

    var infowindow = new google.maps.InfoWindow(); 
    var marker = new google.maps.Marker({ 
    map: map, 
    anchorPoint: new google.maps.Point(0, -29) 
    }); 

    autocomplete.addListener('place_changed', function() { 
    infowindow.close(); 
    marker.setVisible(false); 
    var place = autocomplete.getPlace(); 
    if (!place.geometry) { 
     window.alert("Autocomplete's returned place contains no geometry"); 
     return; 
    } 

    // If the place has a geometry, then present it on a map. 
    if (place.geometry.viewport) { 
     map.fitBounds(place.geometry.viewport); 
    } else { 
     map.setCenter(place.geometry.location); 
     map.setZoom(17); // Why 17? Because it looks good. 
    } 
    marker.setIcon(/** @type {google.maps.Icon} */({ 
     url: place.icon, 
     size: new google.maps.Size(71, 71), 
     origin: new google.maps.Point(0, 0), 
     anchor: new google.maps.Point(17, 34), 
     scaledSize: new google.maps.Size(35, 35) 
    })); 
    marker.setPosition(place.geometry.location); 
    marker.setVisible(true); 

    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><strong>' + place.name + '</strong><br>' + address); 
    infowindow.open(map, marker); 



    }); 

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

    setupClickListener('changetype-all', []); 
    setupClickListener('changetype-address', ['address']); 
    setupClickListener('changetype-establishment', ['establishment']); 
    setupClickListener('changetype-geocode', ['geocode']); 
} 
function kmlClick(marker) { 
    google.maps.event.trigger(geoXml.docs[0].markers[marker],"click"); 
} 

function useTheData(doc){ 
    // Geodata handling goes here, using JSON properties of the doc object 
    // Creates side bar navigation 
    var sidebarHtml = "<table>"; 
    for (var i = 0; i < doc[0].markers.length; i++) { 
    // console.log(doc[0].markers[i].title); 
    sidebarHtml += '<tr><td><a href="javascript:kmlClick('+i+');">'+doc[0].placemarks[i].name+'</a></td></tr>'; 
    } 
    sidebarHtml += "</table>"; 
    document.getElementById("sidebar").innerHTML = sidebarHtml; 
}; 

    </script> 
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyASPL99-mPNhM87jKpOPoALZOUFMHCx1Ag&signed_in=true&libraries=places&callback=initMap" 
     async defer></script> 

    </body> 
</html>

來源

2015-10-07 wpvic

再次感謝您@geocodezip和欣賞所有這些您在網站上共享的例子。 – wpvic

你map變量是本地initMap功能（請注意在它前面的var）。要在HTML點擊事件偵聽器（如複選框）中使用它，它需要位於全局範圍內。更改此：

function initMap() { 
    var map = new google.maps.Map(document.getElementById('map'), { 
    center: {lat: 48.490802, lng: -123.416497}, 
    zoom: 17 
    });

要：

var map; 
function initMap() { 
    map = new google.maps.Map(document.getElementById('map'), { 
    center: {lat: 48.490802, lng: -123.416497}, 
    zoom: 17 
    });

proof of concept fiddle

來源

2015-10-08 00:18:28 geocodezip

聲明失敗：無效：setMap：不是地圖的一個實例

回答

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