각도 컨트롤러 통신의 4가지 방법에 대한 간략한 설명

<div ng-controller="Controller1">
	<div ng-controller="Controller2">
		this prints '42':{{answer}}
	</div>
</div>
m.controller('Controller1', function ($scope) {
	$scope.answer = 42;
});
m.controller('Controller2', function ($scope) {
	console.log($scope.answer);
});

<div ng-controller="Controller1">
	<div ng-controller="Controller2">
	
	</div>
</div>
m.controller('Controller1', function ($scope) {
	$scope.$on('ping', function (){
		console.log('pong');
	});
	$scope.$broadcast('broadcast');
});
m.controller('Controller2', function ($scope) {
	$scope.$emit('ping');
	$scope.$on('broadcast', function (){
		console.log('broadcast');
	});
});

<script type="text/javascript" src="angular.js"></script>
<script type="text/javascript" src="event-emitter.js"></script>
<script type="text/javascript">
	var app = angular.module('app', []);
 
	app.factory('userService', function ($timeout, $window) {
		var emitter = $window.emitter();
		var user = {};
 
		//模拟http错误
		$timeout(function () {
			user.emit('error', 'Could not connect to server');
		}, 1000);
 
		return user;
	});
 
	app.factory('profileService', function (userService) {
		var ret = {
			user: userService,
		};
 
		userService.on('error', function () {
			console.log('get error');
		});
 
		return ret;
	});
</script>