google drive sdk for ios queryForFilesList，无法获取文件列表

Question

我使用Web界面修改或创建文件，或者使用本地驱动器客户端修改mac os。这些文件未显示在我的应用程序中。

即使我更改了authButtonClicked

的方法DrEditFilesListViewController.m中的范围

将此范围kGTLAuthScopeDriveFile替换为kGTLAuthScopeDrive，如下所示

GTMOAuth2ViewControllerTouch *authViewController = 
  [[GTMOAuth2ViewControllerTouch alloc] initWithScope:kGTLAuthScopeDriveFile
                                             clientID:kClientId
                                         clientSecret:kClientSecret
                                     keychainItemName:kKeychainItemName
                                             delegate:self
                                     finishedSelector:finishedSelector];

到

GTMOAuth2ViewControllerTouch *authViewController = 
  [[GTMOAuth2ViewControllerTouch alloc] initWithScope:kGTLAuthScopeDrive
                                             clientID:kClientId
                                         clientSecret:kClientSecret
                                     keychainItemName:kKeychainItemName
                                             delegate:self
                                     finishedSelector:finishedSelector];

我将文件列表视为fowllow：

GTLQueryDrive *query = [GTLQueryDrive queryForFilesList];
query.q = @"mimeType = 'text/plain'";
    [self.driveService executeQuery:query completionHandler:^(GTLServiceTicket *ticket,
                                                              GTLDriveFileList *files,
                                                              NSError *error) {

 ......
    }];