我正在尝试在没有任何 gem 的 Rails 4、Ruby 2 项目中使用 Google Maps API。我的代码如下,我无法显示谷歌地图。屏幕是空白的,控制台上没有任何错误。
<!DOCTYPE html>
<html>
<head>
<title>Maps</title>
<%= stylesheet_link_tag "application", media: "all" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<script>
var map;
function initialize() {
var mapOptions = {
zoom: 8,
center: new google.maps.LatLng(-34.397, 150.644),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map-canvas"),
mapOptions);
}
$(document).ready(function(){
initialize();
});
</script>
</head>
<body>
<div class="container">
<div class="container-fluid">
<%= yield %>
</div>
</div>
</body>
我的 Index.html.erb
<div id="panel">
<button onclick="toggleHeatmap()">Toggle Heatmap</button>
<button onclick="changeGradient()">Change gradient</button>
<button onclick="changeRadius()">Change radius</button>
<button onclick="changeOpacity()">Change opacity</button>
</div>
<div id="map-canvas"></div>