例如：
http://jsfiddle.net/gGKGX/

angular.module("GuyModule",[]).controller("GuyController",function($scope) {

    $scope.something = "foo";

      $scope.guy="This is guy";

    $scope.$watch('guy',function(){ console.log("guy changed!"); }  );

} );


<div  ng-controller="GuyController" ng-app="GuyModule">
    <div ng-switch="something">
        <div ng-switch-when="foo">
            <input ng-model="guy"/>
        </div>
        <div ng-switch-when="bar">
            <button ng-click="something='bar'">Click me!</button>
        </div>
    </div>
</div>

我希望“家伙改变了！”要打印但不是,当我删除“ng-switch-when”时它可以工作.
我该如何解决这个问题？

顺便说一句 – 同样的事情发生在ui-if(来自angularui项目).