echarts圖防止縮在一個角落,動態控制keep-alive緩存、監聽路由跳轉

1、父級組件，通過ref調用子組件，activated每次點擊頁面都會執行

<useele ref="useele" :lineData="lineData" :timenum="timenum" :type="type"></useele>

    activated(){
        if(this.$refs.useele){
            this.$refs.useele.resizeEcharts();
        }
        if(this.$refs.chartsbox){
            this.$refs.chartsbox.resizeEcharts();
        }
    },

2、子組件，讓echarts刷新

            resizeEcharts(){
                if (this.myChart != null && this.myChart != "" && this.myChart !=undefined{
                    this.myChart.resize();
                }
            },   

二、動態控制keep-alive緩存

1、在vuex建立數組keepAlive，用於存放需要緩存的組件name

2、App.vue中、引入keepAlive

        <keep-alive :include="keepAlive">
          <router-view></router-view>
        </keep-alive>

  created(){
         this.$router.push({path: '/Main'});
        this.$store.dispatch("changeKeepAlive","Main");
  },

頁面標籤關閉時，需要剪切掉對應的組件name

//關閉標籤的同時，也關閉組件緩存
 this.keepAlive.splice(this.keepAlive.indexOf(val.name), 1);

打開新頁面時，監聽路由變化

    removalArr(val){
      for(let i = 0;i<this.keepAlive.length;i++){//查找是否有包含的緩存組件
        if(this.keepAlive[i] == val){//如果有,直接return
          return true;
        }
      }
      return false;
    }

  
watch: {
      $route(to,from){
      if(!this.removalArr(to.name) && to.name != "Login"){//如果不存在緩存的組件，並且登錄頁設置爲不緩存
        this.$store.dispatch("changeKeepAlive",to.name);//將此組件添加至緩存中
      }else if(to.name == "Login"){//如果跳轉到登錄頁，需清空所有的緩存
        this.$store.dispatch("changeKeepAlive",[]);//清空
        this.$store.dispatch("changTagArry","");
      }
    }
  },