为什么Google Maps教程无法在我的PC上运行? [英] Why doesn't the google maps tutorial work on my pc?
问题描述
因此，我已经从google开发人员网站上下载了一些示例代码来试用.下面找到的代码与在此处找到的代码完全相同.当我下载html并尝试在chrome中本地打开它时，它什么也没有显示，它返回了一个空白屏幕，没有任何错误(firebug lite).我使用的是Mac，所有这些Web开发人员都是新手.我应该设置本地主机的东西还是我完全丢失了东西?任何帮助是极大的赞赏.
So I've downloaded a sample bit of code from the google developer website to play around with. The bit of code found below is exactly the same as the code found here. When I download the html and try to open it locally in chrome it doesn't show anything, it returns me a blank screen without any errors (firebug lite). I'm using a mac and I'm new at all this web dev stuff. Should I set up a localhost thing or am I completely missing something? Any help is greatly appreciated.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Google Maps JavaScript API v3 Example: Circle Simple</title>
<link href="/maps/documentation/javascript/examples/default.css" rel="stylesheet">
<script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script>
var citymap = {};
citymap['chicago'] = {
center: new google.maps.LatLng(41.878113, -87.629798),
population: 2842518
};
citymap['newyork'] = {
center: new google.maps.LatLng(40.714352, -74.005973),
population: 8143197
};
citymap['losangeles'] = {
center: new google.maps.LatLng(34.052234, -118.243684),
population: 3844829
}
var cityCircle;
function initialize() {
var mapOptions = {
zoom: 4,
center: new google.maps.LatLng(37.09024, -95.712891),
mapTypeId: google.maps.MapTypeId.TERRAIN
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
mapOptions);
for (var city in citymap) {
// Construct the circle for each value in citymap. We scale population by 20.
var populationOptions = {
strokeColor: "#FF0000",
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: "#FF0000",
fillOpacity: 0.35,
map: map,
center: citymap[city].center,
radius: citymap[city].population / 20
};
cityCircle = new google.maps.Circle(populationOptions);
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
</body>
</html>
推荐答案
由于直接从演示站点保存了文件，因此未保存与之关联的CSS文件(/maps/documentation/javascript/examples/default.css).因此，您的地图没有宽度/高度.如果您保存此文件并正确引用它，则它应该可以工作.另外，您也可以将CSS片段添加到html文件中:
Since you saved the file directly from the demo site, you did not save the CSS file associated with it (/maps/documentation/javascript/examples/default.css). So your map has no width/height to it. If you save this file and reference it properly it should work. Alternatively, you can just add the bit of css to your html file:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Google Maps JavaScript API v3 Example: Circle Simple</title>
<style type="text/css">
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map_canvas {
height: 100%;
}
@media print {
html, body {
height: auto;
}
#map_canvas {
height: 650px;
}
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script>
// Create an object containing LatLng, population.
var citymap = {};
citymap['chicago'] = {
center: new google.maps.LatLng(41.878113, -87.629798),
population: 2842518
};
citymap['newyork'] = {
center: new google.maps.LatLng(40.714352, -74.005973),
population: 8143197
};
citymap['losangeles'] = {
center: new google.maps.LatLng(34.052234, -118.243684),
population: 3844829
}
var cityCircle;
function initialize() {
var mapOptions = {
zoom: 4,
center: new google.maps.LatLng(37.09024, -95.712891),
mapTypeId: google.maps.MapTypeId.TERRAIN
};
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
for (var city in citymap) {
// Construct the circle for each value in citymap. We scale population by 20.
var populationOptions = {
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
center: citymap[city].center,
radius: citymap[city].population / 20
};
cityCircle = new google.maps.Circle(populationOptions);
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
</body>
</html>
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