HarmonyOS post请求，如何获取字节流，转化为图片

可以参考以下代码：

stream2Pic() {
  const session = rcp.createSession();
  session.post("http://xxxx", "data to send").then((response) => {
    console.log(JSON.stringify(response));
    if (response && response.body) {
      let base64Helper = new util.Base64Helper();
      let array = new Uint8Array(response.body);
      let src = 'data:image/png;base64,' + base64Helper.encodeToStringSync(array)
      this.src = src
    }
  }).catch((err: BusinessError) => {
    console.error("err:" + JSON.stringify(err));
  });
}

src即可用Image组件显示