angular中实现li或者某个元素点击变色的两种方法

<p ng-click="state=1;" ng-class="{active:state==1}">浮伤年华</p><p ng-click="state=2;" ng-class="{active:state==2}">忧伤说笑</p>

<style type="text/css">  .active{   color:red;  }</style>

  <div ng-controller="active">  <p ng-click="isActive(1)" class="{{i==1?'active':''}}">剧情再美</p>      <p ng-click="isActive(2)" class="{{i==2?'active':''}}">终究是戏</p>  </div>

$scope.isActive=function(i){  $scope.i=i;}

$scope.i=1;