vantUI: 使用vantUI的van-tabbar组件切换tabbar的事件没有响应。

[wangren988888]

Affected version

0.14.1-beta.1

No same issues found.

• Yes, I search all issues but not found.

Steps to Reproduce

1、vue2.x;
2、main.js引入vantUI2.x
3、App.vue文件使用van-tabbar组件

Code example

html:

<van-tabbar v-model="currentTabBarName" @change="tabBarChange">
        <van-tabbar-item name="HomeView" icon="home-o">首页</van-tabbar-item>
        <van-tabbar-item name="ActiveView" icon="home-o">活动</van-tabbar-item>
        <van-tabbar-item name="CaricatureView" icon="home-o">漫画</van-tabbar-item>
        <van-tabbar-item name="LiveView" icon="friends-o">直播</van-tabbar-item>
        <van-tabbar-item name="MineView" icon="setting-o">我的</van-tabbar-item>
</van-tabbar>

js:

tabBarChange(event) {
      this.$router.replace({
        name: event.name
      })
}

Expected results

点击tabbar-item时切换页面

Actual results

点击tabbar-item时没有任何响应