从子控制器访问父控制器成员的一种优雅方法是什么? [英] What's an elegant way of accessing parent controller's member from child controller?

问题描述

我在应用程序中使用controllerAs语法，我想从子控制器访问父控制器的功能，我知道这可以通过注入$ scope来实现，但是考虑到Angular竭尽全力从代码中摆脱$ scope，我想知道是否有一种更优雅的方式来执行此操作而不注入$ scope?

I am using controllerAs syntax in my application, I want to access parent controller's function from child controller, I know this is achievable by injecting $scope, however considering Angular has tried so hard to get rid of the $scope from code, I'd like to know if there is a more elegant way of doing this without injecting $scope?

这是HTML的示例:

<div ng-controller="AppCtrl as app">
  <div ng-controller="ChildCtrl as child">
  </div>
</div>

以及相应的控制器:

angular.module('test').controller('AppCtrl', function () {
  var vm = this;
  vm.log = function() {
    console.log("Output");
  }
}  

angular.module('test').controller('ChildCtrl', function () {
  var vm = this;
  // Here I want to access parent's log() function
}  

我知道我可以注入$ scope，然后通过 $ scope.app.log()访问日志功能，但是有一种更好的方式来访问日志而无需注入 $ scope?

I know I can inject $scope and then access the log function by $scope.app.log(), but is there a bettter way to access log without injecting the $scope?

推荐答案

一种选择是使用Angular 1.5组件(

One option would be to use Angular 1.5 components (docs).

在子组件中看起来像这样:

It would look something like this in child component:

.component('childComponent', {
  require: {
    parentCtrl: '^ parentCtrl'
  }
  controller: function() {
    this.parentCtrl.anyMethod(); //here we are accessing parent's controller properties
  }

  ...

});

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