使用ios上的apiKey将文件上传到Google云端硬盘

Question

我正在尝试将图片上传到Google云端硬盘到我自己的帐户（不是用户帐户），因此我无需向用户请求权限。 为此，我使用apiKey而不是oAuth2方法。 问题是，当我将文件发送给Google时，我得到的错误是“需要登录”，但我想登录，这就是我使用apiKey的原因。

GTLServiceDrive *driveService = [[GTLServiceDrive alloc] init];
[driveService setAPIKey:@"this-Is-My-APIKey"];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"'Quickstart Uploaded File ('EEEE MMMM d, YYYY h:mm a, zzz')"];

GTLDriveFile *file = [GTLDriveFile object];
file.title = [dateFormat stringFromDate:[NSDate date]];
file.descriptionProperty = @"Uploaded from the Google Drive iOS Quickstart";
file.mimeType = @"image/png";

NSData *data = UIImagePNGRepresentation([UIImage imageNamed:@"this-Is-My-Image"]);
GTLUploadParameters *uploadParameters = [GTLUploadParameters uploadParametersWithData:data MIMEType:file.mimeType];
GTLQueryDrive *query = [GTLQueryDrive queryForFilesInsertWithObject:file uploadParameters:uploadParameters];
GTLServiceTicket *queryTicket =
[driveService executeQuery:query
    completionHandler:^(GTLServiceTicket *ticket,
                        GTLDriveFile *insertedFile, NSError *error) {
        if (error == nil) {
            // Uncomment the following line to print the File ID.
             NSLog(@"File ID: %@", insertedFile.identifier);
        } else {
            NSLog(@"An error occurred: %@", error);
        }
    }];

这是我得到的错误：

An error occurred: Error Domain=com.google.GTLJSONRPCErrorDomain Code=401 "The operation couldn’t be completed. (Login Required)" UserInfo=0x7ffa12d14eb0 {error=Login Required, NSLocalizedFailureReason=(Login Required), GTLStructuredError=GTLErrorObject 0x7ffa12d2d8a0: {message:"Login Required" data:[1] code:401}}

对我正在尝试做什么有任何意义？ 欢迎任何帮助，谢谢！