keep-alive添加后页面不缓存问题

// 错误写法
    <keep-alive v-if="$route.meta.keepAlive">
        <router-view></router-view>
      </keep-alive>
    <router-view v-else></router-view> 

// 正确写法
    <keep-alive>
        <router-view v-if="$route.meta.keepAlive"></router-view>
    </keep-alive>
    <router-view v-if="!$route.meta.keepAlive"></router-view>