ios - download-url of GTLDriveFile coming nil and even GTLDriveFileExportLinks coming nil -

i want download files google-drive. have fetched gtldrivefile objects drive. downloadurl property of these file objects nil.

googling more, got file.exportlinks has download links. coming nil.

i used code fetch files:

- (void)fetchfiles {  gtlquerydrive *query = [gtlquerydrive queryforfileslist]; query.maxresults = 10; [self.service executequery:query                   delegate:self          didfinishselector:@selector(displayresultwithticket:finishedwithobject:error:)];        }  - (void)displayresultwithticket:(gtlserviceticket *)ticket          finishedwithobject:(gtldrivefilelist *)files                       error:(nserror *)error { if (error == nil) {     if (files.items.count > 0) {         filearr=files.items;     } } } 

here filearr has files of class gtlfiledrive.

from google-drive developer site, got following code snippet download file using parameter url:

gtmhttpfetcher *fetcher = [self.service.fetcherservice fetcherwithurlstring: urloffile]; [fetcher beginfetchwithcompletionhandler:^(nsdata *data, nserror *error) {     if (error == nil) {          nslog(@"retrieved file content");         // data      } else {          nslog(@"an error occurred: %@", error);     } }]; 

i need urloffile complete task.

any appreciated.

when initial auth, need request right scope - otherwise, rights list files, , not download them.

something like.

nsarray *scopes = [nsarray arraywithobjects:kgtlauthscopedrive, nil]; authcontroller = [[gtmoauth2viewcontrollertouch alloc]                   initwithscope:[scopes componentsjoinedbystring:@" "]                   clientid:self.clientid                   clientsecret:self.clientsecret                   keychainitemname:kkeychainitemname                   delegate:self                   finishedselector:@selector(viewcontroller:finishedwithauth:error:)]; 

you can see in new google drive picker

https://github.com/confusedvorlon/hsgoogledrivepicker