iphone - Create folder in dropbox from application -


i'm making iphone application need integrate dropbox sdk. i'm getting error while creating folder in dropbox.please can tell me how create folder.

here code

(dbrestclient*)restclient {   if (restclient1 == nil) {     restclient1 = [[dbrestclient alloc] initwithsession:[dbsession sharedsession]];     restclient1.delegate = self; }     return restclient1; }  (ibaction)foldercreatemethod:(id)sender {   [[self restclient] createfolder:@"/yourfolder"];     }

i'm getting below error

-[__nscfconstantstring stringbyaddinguripercentescapesusingencoding:]: unrecognized selector sent instance 0x2fe5c

stringbyaddinguripercentescapesusingencoding not method of nsstring defined in category.

to use categories defined in library -- dbrestclient -- have pass -objc flag linker (in xcode)


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