vue keeplive的缓存页面如何销毁重新渲染

//通过组件key属性实现重新渲染
<template> <NoticeCollectionKey :key="componentKey"/></template>

<script>
//原来的页面定义为一个组件import进来
import NoticeCollectionKey from "./NoticeCollectionKey.vue";
export default {
  components: {
    NoticeCollectionKey
  },
  beforeRouteEnter(to, from, next) {
    next(vm => {
       //从des页面来 就要销毁重新渲染 其他时候正常缓存页面
      if (from.path === "/des") vm.forceRerender();
    });
  },
  data() {
    return {
      componentKey: 0
    };
  },
  methods: {
    forceRerender() {
      this.componentKey += 1;
    }
  }
};
</script>

<style></style>