是否有一个孩子控制器继承服务＆QUOT的方式;喜欢＆QUOT;例如从其父？ [英] Is there a way for a child controller to inherit a service "like" instance from its parent?

问题描述

在我的应用我有窗口实例。该应用程序可以包含多个窗口和窗口可以包含多个视图。该意见是每个窗口实例的孩子。

In my app I have window instances. The app can contain multiple windows and windows can contain multiple views. The views are children of each window instance.

function windowController($scope, WindowService) {
    WindowService.setWindowConfig($scope.window);
}

function viewController($scope, WindowService) {
    WindowService.updateDirtyState(true);
}

我希望能够从视图（多个）更新窗口。但我只希望孩子们能够更新他们的父窗口。在于服务是单身，视图将更新所有窗口。

I want to be able to update the window from the view(s). But I only want the children to be able to update their parent window. Being that services are singletons, the view would update all windows.

有没有办法实现这一目标而不传递某种各地的ID？

Is there a way to achieve this without passing some sort of ID around?

推荐答案

服务的是的单身人士，但可以包含比他们回到一个其他对象的构造函数。

Services are singletons, but they can contain constructors for objects other than the one they return.

下面是利用了这个事实服务的骨架例如：

Here is a skeleton example of a service which takes advantage of this fact:

.factory('WindowService', function(){
  var service = {};

  var Window = function() {
    ...
  };

  Window.prototype.doSomething = function(){
    ...
  };

  var View = function(window) {
    this.window = window;
  };

  service.newWindow = function(){
    return new Window();
  }

  service.newView = function(){
    return new View(window);
  }

  return service;
});

假设每个的ViewController 都有自己的 WindowController 家长，他们可以被实例化这种方式：

Assuming every ViewController has its own WindowController parent, they could be instantiated this way:

.controller('WindowController', function($scope, WindowService){
  $scope.window = WindowService.newWindow();
})
.controller('ViewController', function($scope, WindowService){
  $scope.view = WindowService.newView($scope.window);
})

有没有理由担心的ID，因为视图对象将包含对它们的窗口父母引用。事实上，如果所有的的ViewController 活动的一个 WindowController 父母，你可以引用该范围的变量通过原型继承，通过 $ scope.window 从视图，绕过 WindowService 的窗口对象的访问。

There is no reason to worry about id's since the view objects will contain references to their window parents. In fact, if all ViewControllers have a WindowController parent, you could reference that scope variable through prototypical inheritance, via $scope.window from the view, bypassing WindowService for window object access.

.controller('ViewController', function($scope, WindowService){
    $scope.view = WindowService.newView($scope.window);
    // don't need to do $scope.view.window.doSomething(), but you could
    $scope.window.doSomething();
})

演示

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