#鸿蒙通关秘籍#如何使用HarmonyOS保存裁剪后的图片？

export async function savePixelMap(context: Context, pm: PixelMap): Promise<string> {
  if (pm === null) {
    return '';
  }
  const imagePackerApi: image.ImagePacker = image.createImagePacker();
  const packOpts: image.PackingOption = { format: 'image/jpeg', quality: 30 };
  try {
    const data: ArrayBuffer = await imagePackerApi.packing(pm, packOpts);
    return await saveFile(context, data);
  } catch (err) {
    return '';
  }
}

async function saveFile(context: Context, data: ArrayBuffer): Promise<string> {
  let uri: string = context.filesDir + '/' + getTimeStr() + '.jpg';
  const file: fileIo.File = fs.openSync(uri, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
  fs.writeSync(file.fd, data);
  fs.closeSync(file);
  uri = 'file:/' + uri;
  return uri;
}
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