angularjs中怎么根据radio的属性来切换class
<p ng-repeat="reason in options.reasons" class="confirm-reason-item">
<label ng-class="{active: isActive}" ng-click="isActive=!isActive">
<input type="radio" ng-model="data.selectedReason" ng-value="reason.desc">{{reason.desc}}
<span class="radio-checked"></span>
</label>
</p>
我想做个判断 只能点击一个 现在是可以同时点击多个的 但是其实radio 只能选择到一个，谢谢帮帮忙。