HarmonyOS 鸿蒙Next Pixmap保存到本地文件如何实现？

static async savePixelMap(pixelMap: image.PixelMap, path: string, name: string,
  format: string = 'image/png'): Promise<string> {
  try {
    if (!fs.accessSync(path)) {
      fs.mkdirSync(path, true); //如果文件夹不存在就创建
    }
    let filePath = path + "/" + name;
    let file = fs.openSync(path, fs.OpenMode.READ_WRITE);
    let packOpts: image.PackingOption = { format: format, quality: 100 }
<span class="hljs-keyword"><span class="hljs-keyword">const</span></span> imagePacker: image.ImagePacker = image.createImagePacker();
await imagePacker.packToFile(pixelMap, file.fd, packOpts).finally(() =&gt; {
  imagePacker.release(); <span class="hljs-comment"><span class="hljs-comment">//释放</span></span>
});
fs.closeSync(file.fd);<span class="hljs-comment"><span class="hljs-comment">//关闭文件</span></span>
<span class="hljs-keyword"><span class="hljs-keyword">return</span></span> filePath;
} catch (err) {
let error = err as BusinessError;
console.log(ImageUtil-savePixelMap-异常 ~ code: ${error.code} -·- message: ${error.message});
return ‘’;
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>