AngularJS 从外部访问控制器 $scope

AngularJS中如何从外部访问控制器$scope

javascript
app.controller('MyController', function($scope) {
  $scope.message = "Hello, AngularJS!";
  
  $scope.$on('updateMessage', function(event, newMessage) {
    $scope.message = newMessage;
  });
});

javascript
// 在子控制器中
$scope.$emit('updateMessage', 'New message from outside');
// 在父控制器中
$scope.$broadcast('updateMessage', 'New message from outside');

javascript
app.service('MyService', function() {
  var message = "Hello, AngularJS!";
  
  this.getMessage = function() {
    return message;
  };
  
  this.setMessage = function(newMessage) {
    message = newMessage;
  };
});
app.controller('MyController', function($scope, MyService) {
  $scope.message = MyService.getMessage();
  
  $scope.updateMessage = function(newMessage) {
    MyService.setMessage(newMessage);
  };
});

javascript
app.controller('AnotherController', function($scope, MyService) {
  $scope.anotherMessage = MyService.getMessage();
  
  $scope.updateMessage = function(newMessage) {
    MyService.setMessage(newMessage);
  };
});