HarmonyOS 通过PhotoViewPicker选择的图片如何转换为File类型

可以通过fs.openSync(url)，可以直接将获取的url转化为File类型。

参考示例如下：

let PhotoSelectOptions = new picker.PhotoSelectOptions();
PhotoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE;
PhotoSelectOptions.maxSelectNumber = 5;
let photoPicker = new picker.PhotoViewPicker();
photoPicker.select(PhotoSelectOptions)
  .then(async (PhotoSelectResult: picker.PhotoSelectResult) => {
    console.info('PhotoViewPicker.select successfully, PhotoSelectResult uri: ' + JSON.stringify(PhotoSelectResult));
    let file = fs.openSync(PhotoSelectResult.photoUris[0]) //直接将url转化为file类型
  });
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