base64图片转本地地址

const base64toBlob = (b64) => {
  const byteCharacters = window.atob(b64);
  const byteNumbers = new Array(byteCharacters.length);
  for (let i = 0; i < byteCharacters.length; i++) {
    byteNumbers[i] = byteCharacters.charCodeAt(i);
  }
  const byteArray = new Uint8Array(byteNumbers);
  const blob = new Blob([byteArray], { type: "image/png" });
  return blob;
};

const blob: any = base64toBlob(fileByte);
const url = window.webkitURL.createObjectURL(blob) || window.URL.createObjectURL(blob);