ng-click和click-class制作切换的tabs

 <div  ng-init="a=‘Facebook‘" class="athleteprofile-title">
        <ul ng-switch on="a">
        <!--判断a的值，true时，class为clicked-->
            <li ng-click="a=‘Twitter‘" ng-class="{clicked:a===‘Twitter‘}">
                Twitter
            </li>
            <li ng-click="a=‘Facebook‘" ng-class="{clicked:a===‘Facebook‘}">
                Facebook
            </li>
            <li ng-click="a=‘Instagram‘" ng-class="{clicked:a===‘Instagram‘}">
                Instagram
            </li>
            <li ng-click="a=‘Info‘" ng-class="{clicked:a===‘Info‘}">
                Info
            </li>
        </ul>
    </div>