我正在尝试显示导航工具和切换基本地图。当我将它结合起来时，两者都正常工作它显示未捕获类型错误：无法读取属性＆＃39; on＆＃39; of undefined.can any告诉我什么是错误
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
<title></title>
<link rel="stylesheet" href="https://js.arcgis.com/3.15/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.15/esri/css/esri.css">
<style>
html, body, #map { height: 100%; width: 100%; margin: 0; padding: 0; }
#switch{
position:absolute;
right:20px;
top:10px;
z-Index:999;
}
#basemapGallery{
width:380px;
height:280px;
}
#HomeButton {
position: absolute;
top: 95px;
left: 20px;
z-index: 50;
}
#navToolbar{
display: block;
position: absolute;
z-index: 2;
top: 10px;
left:2px
}
.zoominIcon {
display: block;
position: absolute;
width: 16px;
height: 16px;
}
.zoomoutIcon {
position: absolute;
width: 16px;
height: 16px;
}
.zoomfullextIcon {
position: absolute;
width: 16px;
height: 16px;
}
.zoomprevIcon {
position: absolute;
width: 16px;
height: 16px;
}
.zoomnextIcon {
position: absolute;
width: 16px;
height: 16px;
}
.panIcon {
position: absolute;
width: 16px;
height: 16px;
}
.deactivateIcon {
position: absolute;
width: 16px;
height: 16px;
}
</style>
<script src="https://js.arcgis.com/3.15/"></script>
<script>
var map;
require([
"esri/map",
"esri/dijit/BasemapGallery",
"esri/dijit/HomeButton",
"esri/toolbars/navigation",
"dojo/on",
"dojo/parser",
"dijit/registry",
"dijit/Toolbar",
"dijit/form/Button",
"dojo/domReady!"
], function(
Map,
BasemapGallery,
HomeButton,
Navigation,
on,
parser,
registry
) {
parser.parse();
var navToolbar;
map = new Map("map", {
basemap: "topo",
center: [-105.255, 40.022],
zoom: 13,
slider:false
});
//add the basemap gallery, in this case we'll display maps from ArcGIS.com including bing maps
var basemapGallery = new BasemapGallery({
showArcGISBasemaps: true,
map: map
}, "basemapGallery");
basemapGallery.on('load',function(){
basemapGallery.remove('basemap_1');
basemapGallery.remove('basemap_2');
basemapGallery.remove('basemap_3');
basemapGallery.remove('basemap_4');
basemapGallery.remove('basemap_5');
basemapGallery.remove('basemap_8');
});
basemapGallery.startup();
basemapGallery.on("error", function(msg) {
console.log("basemap gallery error: ", msg);
});
var home = new HomeButton({
map: map
}, "HomeButton");
home.startup();
navToolbar = new Navigation(map);
on(navToolbar, "onExtentHistoryChange", extentHistoryChangeHandler);
registry.byId("zoomin").on("click", function () {
navToolbar.activate(Navigation.ZOOM_IN);
});
registry.byId("zoomout").on("click", function () {
navToolbar.activate(Navigation.ZOOM_OUT);
});
registry.byId("zoomfullext").on("click", function () {
navToolbar.zoomToFullExtent();
});
registry.byId("zoomprev").on("click", function () {
navToolbar.zoomToPrevExtent();
});
registry.byId("zoomnext").on("click", function () {
navToolbar.zoomToNextExtent();
});
registry.byId("pan").on("click", function () {
navToolbar.activate(Navigation.PAN);
});
registry.byId("deactivate").on("click", function () {
navToolbar.deactivate();
});
function extentHistoryChangeHandler () {
registry.byId("zoomprev").disabled = navToolbar.isFirstExtent();
registry.byId("zoomnext").disabled = navToolbar.isLastExtent();
}
});
</script>
</head>
<body class="claro">
<div id="map">
<div id="navToolbar" data-dojo-type="dijit/Toolbar">
<div data-dojo-type="dijit/form/Button" id="zoomin" data-dojo-props="iconClass:'zoominIcon'">Zoom In</div>
<div data-dojo-type="dijit/form/Button" id="zoomout" data-dojo-props="iconClass:'zoomoutIcon'">Zoom Out</div>
<div data-dojo-type="dijit/form/Button" id="zoomfullext" data-dojo-props="iconClass:'zoomfullextIcon'">Full Extent</div>
<div data-dojo-type="dijit/form/Button" id="zoomprev" data-dojo-props="iconClass:'zoomprevIcon'">Prev Extent</div>
<div data-dojo-type="dijit/form/Button" id="zoomnext" data-dojo-props="iconClass:'zoomnextIcon'">Next Extent</div>
<div data-dojo-type="dijit/form/Button" id="pan" data-dojo-props="iconClass:'panIcon'">Pan</div>
<div data-dojo-type="dijit/form/Button" id="deactivate" data-dojo-props="iconClass:'deactivateIcon'">Deactivate</div>
</div>
<div id="HomeButton"></div>
<div id="switch" data-dojo-type="dijit/TitlePane" data-dojo-props="title:'Switch Basemap', closable:false, open:false">
<div id="basemapGallery"></div>
</div>
</div>
</body>
</html>
答案 0 :(得分：3)
parser.parse在dojo 1.8 +
中返回延迟这意味着在
之后parser.parse()
您的小部件不一定要实例化，并且可以通过dijit / registry注册为小部件。
这也是直接来自Dojo参考指南：
注意等待dojo / domReady！使用小部件时，解雇通常是不够的。在下列模块加载并执行之前，不应初始化或访问许多小部件：
- 道场/ uacss
- 的dijit / hccss
- 道场/解析器
因此，在使用小部件时，通常应将代码放在dojo / ready（）回调中：
你通过包括＆＃34; dojo / ready＆＃34;来做到这一点。在您的require数组中，然后在
中包装任何小部件代码ready(function(){
...your widget code....
})
在您的情况下，您可能只需将整个javascript代码包装在就绪函数中
require([
"esri/map",
"esri/dijit/BasemapGallery",
"esri/dijit/HomeButton",
"esri/toolbars/navigation",
"dojo/on",
"dojo/parser",
"dijit/registry",
"dojo/ready",
"dijit/Toolbar",
"dijit/form/Button",
"dojo/domReady!"
], function(
Map,
BasemapGallery,
HomeButton,
Navigation,
on,
parser,
registry,
ready
) {
ready(function() {
var navToolbar;
map = new Map("map", {
basemap: "topo",
center: [-105.255, 40.022],
zoom: 13,
slider: false
});
...etc
我也喜欢使用parseOnLoad = true，我发现它不容易出错（无论是人为还是其他）
只需将此脚本元素放在arcgis js脚本标记上方，就像这样
<script type="text/javascript">
var dojoConfig = {
parseOnLoad: true
};
</script>
<script src="https://js.arcgis.com/3.15/"></script>
并删除对脚本顶部的parser.parse（）的调用。