角度指令可以需要自己的控制器吗？

Question

这是一个简单的问题，但我似乎找不到任何相关文档...

我试图找出一个角度指令是否既可以继承父控制器也可以继承它自己的。考虑以下示例：

简单的自我继承

app.directive('screen', function() {
  return {
    scope: true,
    controller: function() {
        this.doSomething = function() {

        };
    },
    link: function($scope, el, attrs, ctrl) {
        // ctrl now contains `doSomething`
    }
  }
});

从父级继承

app.directive('screen', function() {
  return {
    scope: true,
    controller: function() {
        this.doSomething = function() {

        };
    }
  }
});
app.directive('widget', function() {
  return {
    scope: true,
    require: '^screen',
    link: function($scope, el, attrs, ctrl) {
        // ctrl now contains `doSomething` -- inherited from the `screen` directive
    }
  }
});

甚至还有多重继承...

app.directive('screen', function() {
  return {
    scope: true,
    controller: function() {
        this.doSomething = function() {

        };
    }
  }
});
app.directive('widget', function() {
  return {
    scope: true,
    require: ['^screen','^anotherParent'],
    link: function($scope, el, attrs, ctrl) {
        // ctrl[0] now contains `doSomething` -- inherited from the `screen` directive
        // ctrl[1] now contains the controller inherited from `anotherParent`
    }
  }
});

我想不通的是如何让指令同时继承父控制器和它自己的控制器。像这样：

app.directive('screen', function() {
  return {
    scope: true,
    controller: function() {
        this.doSomething = function() {

        };
    }
  }
});
app.directive('widget', function() {
  return {
    scope: true,
    require: '^screen',
    controller: function($scope) {
       // isolated widget controller
    },
    link: function($scope, el, attrs, ctrl) {
        // I need the `screen` controller in ADDITION to the isolated widget controller accessible in the link
    }
  }
});

这是可能的/正确的形式（还是我不知道的某种反模式）？

Answer 1

事实证明，这比我想象的要明显得多……经过反复试验表明，指令实际上也可以要求自身。

继承父级+本地控制器的正确方法似乎是：

app.directive('screen', function() {
  return {
    scope: true,
    controller: function() {
        this.doSomething = function() {

        };
    }
  }
});
app.directive('widget', function() {
  return {
    scope: true,
    require: ['^screen','widget'],
    controller: function($scope) {
       this.widgetDoSomething = function() {
       };
    },
    link: function($scope, el, attrs, ctrl) {
        // ctrl[0] contains the `screen` controller
        // ctrl[1] contains the local `widget` controller
    }
  }
});