vant 页面切换后，tabbar的样式和当前页面不符合

  mounted () {
    const navBarActive = window.location.hash
    if (navBarActive.includes('#/layout/healthservices')) {
      this.active = '健康服务'
    } else if (navBarActive.includes('#/layout/home')) {
      this.active = '首页'
    } else if (navBarActive.includes('#/layout/specialservices')) {
      this.active = '特色服务'
    } else if (navBarActive.includes('#/layout/user')) {
      this.active = '我的'
    }
  }