vue3封装echarts图表数据无法渲染到页面问题

 methods: {
    loadGet() {
      this.$axios.get(this.$httpUrl + '/goods/count').then(res => res.data).then(res => {
        console.log(res)
        // this.cntdata = res.data
        if (res.code == 200) {
          // this.yData = res.data
          // this.cntData.length=0;
          for (let i = 0; i < res.data.length; i++) {
            this.cntData.push(res.data[i]);
          }
          console.log("data = =" + this.cntData + res.data.length)
          this.$message({
            message: '操作成功！',
            type: 'success'
          });
        } else {
          this.$message({
            message: '操作失败！',
            type: 'error'
          });
        }

      })
    },
    init() { //调用session中的用户数据
      this.user = JSON.parse(sessionStorage.getItem('CurUser'))
    },
    initEcharts() {
      let option = {
        title: {
          text: "现存物资量"
        },
        tooltip: {},
        legend: {
          data: [""]
        },
        xAxis: {
          data: ["鼠标", "帐篷", "键盘", "口罩", "矿泉水", "棉被"]
        },
        yAxis: {},
        series: [
          {
            name: "发放量",
            type: "bar", //类型为柱状图
            // data: [5, 20, 36, 10, 10, 20]
            data: this.cntData  //问题出在这 data一直不能被后端返回的this.cntData渲染！
          }
        ]
      };
      const myChart = echarts.init(this.$refs.mychart);// 图标初始化

      myChart.setOption(option);// 渲染页面
      //随着屏幕大小调节图表
      window.addEventListener("resize", () => {
        myChart.resize();
      });
    },
  },
  created() {
    this.init()
  }
}
</script>

methods: {
  loadGet() {
    this.$axios.get(this.$httpUrl + '/goods/count').then(res => res.data).then(res => {
      console.log(res);
      if (res.code === 200) {
        this.cntData = res.data; // 将数据赋值给 cntData
        this.initEcharts(); // 初始化图表 !!!!!!这里！
        this.$message({
          message: '操作成功！',
          type: 'success'
        });
      } else {
        this.$message({
          message: '操作失败！',
          type: 'error'
        });
      }
    });
  },
  initEcharts() {
    let option = {
      // ... 其余图表配置 ...
      series: [
        {
          name: "发放量",
          type: "bar", //类型为柱状图
          data: this.cntData // 使用从后端获取的数据
        }
      ]
    };
    const myChart = echarts.init(this.$refs.mychart);
    myChart.setOption(option);
    window.addEventListener("resize", () => {
      myChart.resize();
    });
  },
  // ... 其他方法 ...
},