demo21.html

<!DOCTYPE html>
<html ng-app="msgModule">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>demo21</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script type="text/javascript" src="js/angular.js"></script>
</head>
<body>
    <div ng-controller="MsgController">
    	<div>
    		<button ng-click="scheduleTask()">3秒后回显信息</button>
    	</div>
    	<div>
    		{{message}}
    	</div>
    </div>
    <script type="text/javascript">
    	angular.module('msgModule',[]).controller('MsgController', 
    		function($scope){
    			$scope.scheduleTask = function(){
    				setTimeout(function(){
    					$scope.$apply(function(){
    						$scope.message = '信息内容';
    						console.log('message'+$scope.message);
    					});
    				},3000);
    			}
    	});
    </script>
</body>
</html>