当调用`userDidAcceptCloudKitShareWith（:)`时，如何获取父CKRecord的所有子节点？

Question

private class DownloadingTask  extends AsyncTask<Void,Void,Void> {

    @Override
    protected Void doInBackground(Void... voids) {
        try {
            URL url = new URL("[your url here]");
            HttpURLConnection c = (HttpURLConnection) url.openConnection();
            c.setRequestMethod("GET");
            c.connect();

            Log.d("sdsdfds", "doInBackground: " + getApplicationContext().getFilesDir());

            FileOutputStream fos = getApplicationContext().openFileOutput("Robotoo4.ttf", MODE_PRIVATE);
            Log.i("Download","complete");
            Log.i("FOS",""+fos.toString());

            InputStream is = c.getInputStream();
            byte[] buffer = new byte[4 * 1024];
            int len1 = 0;
            while ((len1 = is.read(buffer)) != -1) {
                fos.write(buffer, 0, len1);
            }
            fos.close();
            is.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);

        File file = new File(getFilesDir() + "/" + "Robotoo4.ttf");
        Log.d("", "onPostExecute: " + file.exists() + " " + file.getAbsolutePath() + " Length " + file.length() );
    }
}

这样我只能下载@available(iOS 10.0, *) func application(_ application: UIApplication, userDidAcceptCloudKitShareWith cloudKitShareMetadata: CKShareMetadata) { let acceptSharesOperation = CKAcceptSharesOperation(shareMetadatas: [cloudKitShareMetadata]) acceptSharesOperation.perShareCompletionBlock = { metadata, share, error in let operation = CKFetchRecordsOperation(recordIDs: [cloudKitShareMetadata.rootRecordID]) operation.perRecordCompletionBlock = { record, _, error in //do sth with root record } CloudAssistant.shared.container.sharedCloudDatabase.add(operation) } acceptSharesOperation.qualityOfService = .userInteractive CKContainer(identifier: cloudKitShareMetadata.containerIdentifier).add(acceptSharesOperation) } ，但随着这条记录，我使用rootRecord关联了大量记录。

有没有办法在这里获取它们？