HarmonyOS 鸿蒙Next pixelMap.crop 后如何获取到YUV buffer

pixelMap.crop的回调函数一般是用于接收裁剪失败的错误的，无法获取yuv格式数据。

this.pixelMap?.crop({ x: 150, y: 100, size: { height: 100, width: 100 } }, (err: BusinessError) => {
  if (err) {
    console.error(`Failed to crop pixelmap. code is ${err.code}, message is ${err.message}`);
    return;
  } else {
    console.info("Succeeded in cropping pixelmap.");
  }
})

获取yuv数据可以参考：

async onImageArrival(receiver: image.ImageReceiver): Promise<void> {
  receiver.on('imageArrival', () => {
    //保存文件
    receiver.readLatestImage((err, nextImage: image.Image) => {
      if (err || nextImage === undefined) {
        return;
      }
      nextImage.getComponent(image.ComponentType.JPEG, async (err, imgComponent: image.Component) => {
        if (err || imgComponent === undefined) {
          return;
        }
        if (imgComponent.byteBuffer as ArrayBuffer) {
          let path: string = getContext().filesDir + "/image.yuv";
          let file = fs.openSync(path, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
          let opt: WriteOptions = {
            // 多出2048字节数据
            length: imgComponent.byteBuffer.byteLength - 2048
          }
          fs.write(file.fd, imgComponent.byteBuffer, opt).then((writeLen) => {
            console.info("write data to file succeed and size is:" + writeLen);
            fs.closeSync(file);
          }).catch((err: BusinessError) => {
            console.info("write data to file failed with error message: " + err.message + ", error code: " + err.code);
          });
        } else {
          return;
        }
        nextImage.release();
      })
    })
  })
}