【AngularJS系列】controller as

比较经典的用法

<div ng-controller="MainController">  
    {{ someObj.someProp }}
</div>  

app.controller('MainController',function ($scope) {
    $scope.someObj = {
        someProp: 'Some value.'
    };
});

使用Controller as后，变成了

<div ng-controller="MainController as main">  
    {{ main.someProp }}
</div>  

app.controller('MainController',function ($scope) {
   this.someProp = 'Some value.'
});

更多的参考：
https://github.com/johnpapa/angular-styleguide 其列举了angularjs的各种推荐写法
https://github.com/johnpapa/angular-styleguide/blob/master/a1/README.md


更有意义的是，它还可以避免scope的继承，书写更清晰，例如：
子controller可以同步修改父controller的对象，而免去scope继承的问题

<div ng-controller="ParentController as parent">
    ParentController: <input type="text" ng-model="parent.foo" />
    parent.foo: {{ parent.foo }}
    <div ng-controller="ChildController as child">
        ChildController: <input type="text" ng-model="parent.foo" />
        parent.foo: {{ parent.foo }}
    </div>
</div>

app.controller('ParentController', function($scope) {
    this.foo = "bar";
});

app.controller('ChildController',function ($scope) {
});

更多参考：
http://www.tuicool.com/articles/Mfeimu