详解vue beforeRouteEnter 异步获取数据给实例问题

async beforeRouteEnter(to, from, next) {
   let res = await gameData()
   console.log('beforeRouteEnter start');
   next(vm => {
    console.log("vm start")
    vm.is_exchange = res.is_exchange
    vm.is_finish = res.is_finish
   })
 },
 beforeCreate() {
  console.log("beforeCreate start")
 },
 mounted(){
  console.log('mounted start');
  if(this.is_finish){
   this.modalMsg="活动已结束"
   return;
  }
  if(this.is_exchange){
   this.modalMsg="您已兑换奖品"
   return;
  }
 }

async beforeRouteEnter(to, from, next) {
   let res = await gameData()
   console.log('beforeRouteEnter start');
   next(vm => {
    console.log("vm start")
    vm.is_exchange = res.is_exchange
    vm.is_finish = res.is_finish

    vm.judge();//赋值之后，此处调用判断方法
   })
 },
 beforeCreate() {
  console.log("beforeCreate start")
 },
 mounted(){
  console.log('mounted start');
 },
 methods:{
  judge(){// 将判断逻辑写入judge方法
  if(this.is_finish){
   this.modalMsg="活动已结束"
   return;
  }
  if(this.is_exchange){
   this.modalMsg="您已兑换奖品"
   return;
  }
  }
 }