我正在使用AngularJS来显示Bing Maps,但错误显示为“ TypeError:无法读取null的属性'prototype'。”请在下面看看。
在我的Razor视图文件中具有以下内容:
<script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0"></script>
<script type="text/javascript" src="~/lib/angular/angular.min.js"></script>
<script src="~/js/Site.js"></script>
----
----
--
<div ng-app="myDisplayItems">
<div ng-controller="myDisplayItemsController">
<div id="myMap"></div>
</div>
</div>
我的JavaScript文件中有:
var displayItems = angular.module("myDisplayItems", []);
displayItems.controller("myDisplayItemsController", function myDisplayItemsController($scope) {
showMap();
});
function showMap() {
var key = "######";
var map = new Microsoft.Maps.Map('#myMap', {
credentials: key,
zoom: 3
});
}
更新:
var displayItems = angular.module("myDisplayItems", []);
displayItems.controller("myDisplayItemsController", function myDisplayItemsController($scope) {
$scope.map = null;
$scope.init = function () {
$scope.map = showMap();
};
angular.element(document).ready(function () {
$scope.init();
});
});
答案 0 :(得分:1)
显然,由于初始化地图后,Bing Maps库尚未准备就绪,因此会发生此错误。
没有错误发生,showMap
函数在经过一段时间的延迟(假设当时Bing Maps库已加载)后被调用,例如:
$timeout(function() { $scope.initMap()}, 2000);
但是我会提出以下解决方案:
注册必应地图库准备就绪后需要触发的功能,如下所示:
Microsoft.Maps.CallbackOnLoad = "initMap";
并声明initMap
一个 global 函数:
$window.showMap = function () {
//...
}
演示
angular.module('mapApp', []);
angular
.module('mapApp')
.controller('MapController', MapController);
function MapController($scope, $window) {
$window.initMap = function () {
let map = new window.Microsoft.Maps.Map(
document.getElementById('myMap'), {
credentials: 'AjwUEXFZA8SMyy8CaJj59vJKVDoWohNXVFz_uGyHlT8N40Jgr-zrhvcxbTNRyDqn'
});
map.setView({
zoom: 6,
center: new Microsoft.Maps.Location(52.406978607177734, -1.5077600479125977)
});
}
Microsoft.Maps.CallbackOnLoad = "initMap";
}
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.3/angular.min.js"></script>
<script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0"></script>
<div ng-app="mapApp" ng-controller="MapController">
<div id="myMap" style="width:600px;height:400px;"></div>
</div>