angularjs的Controller as

 1 <html ng-app="notesApp">
 2 <head><title>Notes App</title></head>
 3 <body ng-controller="MainCtrl as ctrl">
 4   <form ng-submit="ctrl.submit()" name="myForm">
 5     <input type="text"
 6        name="uname"
 7        ng-model="ctrl.user.username"
 8        required
 9        ng-minlength="4">
10     <span ng-show="myForm.uname.$error.required">
11       This is a required field
12     </span>
13     <span ng-show="myForm.uname.$error.minlength">
14       Minimum length required is 4
15     </span>
16     <span ng-show="myForm.uname.$invalid">
17       This field is invalid
18     </span>
19     <input type="password"
20        name="pwd"
21        ng-model="ctrl.user.password"
22        required>
23     <span ng-show="myForm.pwd.$error.required">
24       This is a required field
25     </span>
26     <input type="submit"
27        value="Submit"
28        ng-disabled="myForm.$invalid">
29   </form>
30 <script src="http://riafan.com/libs/angular.js"></script>
31 <script type="text/javascript">
32   angular.module('notesApp', [])
33     .controller('MainCtrl', [function() {
34       var self = this;
35       self.submit = function() {
36         console.log('User clicked submit with ', self.user);
37       };
38     }]);
39 </script>
40 </body>
41 </html>

ng-controller="MainCtrl as ctrl"，允许数据可以在同一个页面的不同的controller之间自由穿梭。。。

Create a reference to this in our controller.

angular.module('app').controller('MainCtrl', function ($scope){
  var self = this;

Remove $scope from our controller dependency, and use self instead of $scope.

angular.module('app').controller('MainCtrl', function (){
  var self = this;

  self.message = 'hello';

  self.changeMessage = function(message){
    self.message = message;
  };
});