摘要：
在第二次迭代遍历自定义对象的“数组”后,使用ng-repeat进行泄漏,如下所示：
<div ng-repeat="d_sampleObject in mySampleObjects">
{{d_sampleObject.description}}
</div>
内存配置文件显示剩余的额外“d_sampleObject”而未取消引用.下面是更多细节(通过控制器和注入服务).在提供的plunkr链接中也进行了简单的演示.任何想法和帮助提前非常感谢！
注意：’mySampleObjects’是以下实例的数组：
ml.MySampleObject = function (id) {
this.id = id;
this.description = 'this is object #:' + ' '+id;
}
细节：
我有一个自定义对象模型,它反映了我们在AngularJS应用程序中使用的业务域对象.我发现当我将一个自定义对象的实例传递给ng-repeat时,会保留一个引用(我认为是Angular)并且内存未被释放.这发生在ng-repeat的第二个’wave'(点击’refresh’)上,因为它再次在其对象数组上进行迭代.此泄漏在我的个人资料测试中公开(在Chrome中). Here是plunkr的一个简短例子.单击“刷新”按钮一次(或更多次)以查看泄漏的额外“d_sampleObject”对象实例(在Chrome配置文件检查中).请注意,’d_sampleObject’名称仅在传递给ng-repeat时使用.我已经包含了下面进一步泄漏的额外对象实例(‘d_sampleObject’)的屏幕截图.为什么会有泄漏？如何避免泄漏？
(注意,我发现如果我不通过对象迭代我的对象集合(JS数组)而是通过原始索引(‘整数’),则没有泄漏.泄漏似乎只发生在我使用作为ng-repeat迭代的结果的对象引用)
简单的HTML：
<!DOCTYPE html>
<html ng-app="memoryleak">
<head>
<Meta charset="utf-8" />
<title>Memory Leak Test</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.13/angular.min.js" data-semver="1.3.13"></script>
<script src="app.js"></script>
<script src="dataservice.js"></script>
</head>
<body ng-controller="MainCtrl">
<div ng-repeat="d_sampleObject in mySampleObjects">
{{d_sampleObject.description}}
</div>
<br>
<button ng-click="redo()">Number of refreshes: {{numRedos}}!</button>
</body>
</html>
SIMPLE APP.JS
(function(ml) {
var app = angular.module('memoryleak',['servicemodule']);
app.controller('MainCtrl',['$scope','dataservice',function($scope,dataservice) {
$scope.redo = function () {
$scope.numRedos++;
$scope.mySampleObjects = dataservice.myObjectCollection;
dataservice.redo();
}
$scope.redo();
}]);
}(window.MEMLEAK = window.MEMLEAK || {}));
SIMPLE dataservice.js
(function(ml) {
'use strict';
var serviceModule = angular.module('servicemodule',[]);
serviceModule.factory('dataservice',['$rootScope','$http',function ($rootScope,$http) {
this.myObjectCollection = [];
this.redo = function () {
this.numRedos++;
// that.myObjectCollection = [];
this.myObjectCollection.length = 0;
for (var i = 0; i < 10; i++) {
var sampleObject = new ml.MySampleObject(i);
that.myObjectCollection.push(sampleObject);
}
sampleObject=null;
}
ml.MySampleObject = function (id) {
this.id = id;
this.description = 'this is object #:' + ' '+id;
}
return this; //return the entire service to make methods accessible to dependents
}]);
}(window.MEMLEAK = window.MEMLEAK || {}));
屏幕截图1 :(第一页加载 – 创建了10个’mySampleObjects’)
屏幕截图2 :(点击刷新 – 创建/泄漏了第11个mySampleObject,引用了传递给ng-repeat的’d_sampleObject’实例名称.)
