javascript Google Maps API V3 setCenter 不起作用
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Google Maps API V3 setCenter not working
提问by Cody
I am having issues getting setCenter to work. My JS console tells me:
我在使用 setCenter 时遇到问题。我的 JS 控制台告诉我：
myMap is not defined
myMap.setCenter(newLatLng);
It is clearly defined in the historyMap() function
在historyMap()函数中有明确的定义
My JavaScript
我的 JavaScript
44 function historyMap() {
45 var travelCoords = new Array();
46 var allCoords = new Array();
47 var myOptions = {
48 center: new google.maps.LatLng(<?php echo $places[$lastPlace]['lat']; ?>, <?php echo $places[$lastPlace]['long']; ?>),
49 zoom: 8,
50 mapTypeId: google.maps.MapTypeId.HYBRID
51 };
52 var myMap = new google.maps.Map(document.getElementById("map"), myOptions);
53 allCoords = [
54 <?php for($i = 0; $i < $numPlaces; $i++) { ?>
55 new google.maps.LatLng(<?php echo $places[$i]['lat']; ?>, <?php echo $places[$i]['long'];?>),
56 <?php } ?>
57 ];
58 var travelPath = new google.maps.Polyline({
59 path: allCoords,
60 strokeColor: "#FF0000",
61 strokeOpacity: 1.0,
62 strokeWeight: 4
63 });
64 lastLatLng = new google.maps.LatLng(<?php echo $places[$lastPlace] ['lat'];?>, <?php echo $places[$lastPlace]['long'];?>);
65 var marker = new google.maps.Marker({
66 icon: 'img/<?php echo $icon; ?>',
67 position: lastLatLng,
68 map: myMap,
69 title: '<?php echo $places[$numPlaces-1]['title'];?>'
70 });
71 travelPath.setMap(myMap);
72 }
73
74 function setMapCenter(lat,lng) {
75
76 var newLatLng = new google.maps.LatLng(lat,lng);
77 myMap.setCenter(newLatLng);
78
79 }
80
81 $(function() {
82 historyMap();
83 });
The HTML calling the setMapCenter function:
调用 setMapCenter 函数的 HTML：
<td><a href="javascript:void(0);" onClick="setMapCenter('49.261226','-123.113927')">Vancouver</a></td>
I really appreciate any insight anybody can provide.
我非常感谢任何人可以提供的任何见解。
回答by Elorfin
It's because your variable myMapis a local variable : it is only defined for your function historyMap().
这是因为你的变量myMap是一个局部变量：它只为你的函数 historyMap() 定义。
Initialize it, out your functions :
初始化它，出你的功能：
var myMap = {};
function historyMap() { ... }
// other functions
