Ng-如果在角度js中导致内存泄漏

时间:2014-09-24 16:56:40

标签: angularjs memory-leaks angularjs-directive angular-ng-if

Ng-如果在角度js中导致内存泄漏! 图片:https://www.mediafire.com/?ojoc55ccnyqlxyb

我的应用有两页  

第一页是显示搜索输入的主页

第二页是释放内存的empy页面。

我是如何检测泄漏的?
从链接运行我的应用:http://www.mediafire.com/download/y5f6f326f3zo0ch/LeakProject_-_Copy.7z
在匿名模式下使用铬,F12 - >个人资料 - >记录堆分配。 点击主页后点击主页,重复更多时间,结果没有任何泄漏。

但是如果你输入任何要搜索的东西,那么你会进入空页以释放内存。你会泄漏。

我发现,当转到空白页面时,主页中的ovNgListBox范围将会破坏。 我认为scope.textSearch的值将更改为undefined和$ scope。$ watch in ng-if of angualr.js将执行以销毁范围。但反之亦然: 虽然html范围

<ov-ng-list-box class="ng-isolate-scope"><div ng-init="showFilter=true" class="pull-right">

被销毁。

的范围
 <input type="text" ng-model="textSearch" ng-if="showFilter" placeholder="please type here to search..." class="search ng-scope ng-pristine ng-valid">

没有被破坏。为什么?

即使您将scope.showFilter的值更改为false,然后将$ scope更改为$ watch of in-if not called。

摘录代码:

// templateleak.html <br/>

    <div class="pull-right" ng-init="showFilter=true" >
      <input type="text" class="search" placeholder="please type here to search..." ng-if="showFilter" ng-model="textSearch"/>
    </div>

// my directive
app.directive('ovNgListBox', [function () {
    return {
      restrict: 'AE',
      scope: {},
      templateUrl: 'views/template/templateLeak.html',
      controller: ['$scope',function(scope){
        console.log("Im in link of directive");
        scope.textSearch='';
        scope.search = function(){};
        scope.$on('$destroy', function(){
            scope.showFilter=false;
        });
      }]
    };
  }])


//angular.js
var ngIfDirective = ['$animate', function($animate) {
  return {
    transclude: 'element',
    priority: 600,
    terminal: true,
    restrict: 'A',
    $$tlb: true,
    link: function ($scope, $element, $attr, ctrl, $transclude) {
        var block, childScope, previousElements;
        $scope.$watch($attr.ngIf, function ngIfWatchAction(value) {

          if (toBoolean(value)) {
            if (!childScope) {
//

1 个答案:

答案 0 :(得分:1)

使用清理功能清除angular.element对象:

function dealoc(obj)
  {
  var jqCache = angular.element.cache;
  if (obj)
    {
    if (angular.isElement(obj))
      {
      cleanup(angular.element(obj));
      }
    else if (!window.jQuery)
      {
      // jQuery 2.x doesn't expose the cache storage.
      for (var key in jqCache)
        {
        var value = jqCache[key];
        if (value.data && value.data.$scope == obj)
          {
          delete jqCache[key];
          }
        }
      }
    }

  function cleanup(element)
    {
    element.off().removeData();
    if (window.jQuery)
      {
      // jQuery 2.x doesn't expose the cache storage; ensure all element data
      // is removed during its cleanup.
      jQuery.cleanData([element]);
      }
      // Note: We aren't using element.contents() here. Under jQuery,   element.contents() can fail
      // for IFRAME elements. jQuery explicitly uses (element.contentDocument ||
      // element.contentWindow.document) and both properties are null for IFRAMES that aren't attached
      // to a document.
var children = element[0].childNodes || [];
      for (var i = 0; i < children.length; i++)
        {
        cleanup(angular.element(children[i]));
        }
      }
    }

<强>参考