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javascript - 在 AngularJS 中加载异步谷歌地图

转载 作者:塔克拉玛干 更新时间:2023-11-02 20:58:54 25 4
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我正在尝试在我的 AngularJS 项目中延迟加载 Google map 。我在检查时看到 map 在 DOM 中异步加载,但它没有出现在我的 Chrome 浏览器的视口(viewport)中。

我错过了什么?

这里是 plunker。 http://embed.plnkr.co/5LYp91Wl7xrJ1QcNEN2W/preview

这是工厂和指令的 JS 代码:

(function() {
'use strict';

angular
.module('myapp', [])
.factory('mapsInit', mapsInitFactory)
.directive('propertyMap', propertyMap);

function mapsInitFactory($window, $q) {
//Google's url for async maps initialization accepting callback function
var asyncUrl = 'https://maps.googleapis.com/maps/api/js?callback=',
mapsDefer = $q.defer();

//Callback function - resolving promise after maps successfully loaded
$window.googleMapsInitialized = mapsDefer.resolve; // removed ()

//Async loader
var asyncLoad = function(asyncUrl, callbackName) {
var script = document.createElement('script');
//script.type = 'text/javascript';
script.src = asyncUrl + callbackName;
document.body.appendChild(script);
};

//Start loading google maps
asyncLoad(asyncUrl, 'googleMapsInitialized');

//Usage: Initializer.mapsInitialized.then(callback)
return {
mapsInitialized: mapsDefer.promise
};
}

function propertyMap(mapsInit) {
return {
restrict: 'E',
scope: {
mapId: '@id', // map ID
lat: '@', // latitude
long: '@' // longitude
},
link: function(scope) {
// Simple check
console.log(scope.mapId, scope.lat, scope.long);
// Check if latitude and longitude are specified
if (angular.isDefined(scope.lat) && angular.isDefined(scope.long)) {

// Initialize the map
var initialize = function() {

var location = new google.maps.LatLng(scope.lat, scope.long);

var mapOptions = {
zoom: 12,
center: location
};

var map = new google.maps.Map(document.getElementById(scope.mapId), mapOptions);

new google.maps.Marker({
position: location,
map: map
});
};
// Loads google map script
mapsInit.mapsInitialized.then(function() {
// Promised resolved
initialize();
}, function() {
// Promise rejected
});
}
}
};

}

})();

这是 html(style.css 是空的):

<!DOCTYPE html>
<html ng-app="myapp">

<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.5/angular.min.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>

<body ng-init="working = true">
<h1>Async Google Maps</h1> AngularJS works: {{working}}
<property-map id="map-12345" lat="45.53315412" long="-73.61803162"></property-map>
</body>

</html>

最佳答案

我觉得自己很傻,但我只需要向 property-map 添加一些样式 ;-)

property-map {
display: block;
background-color: #fafafa;
height: 500px;
width: 100%;
}

关于javascript - 在 AngularJS 中加载异步谷歌地图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32553455/

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