objective c - How can i parse very long JSon string in iOS without memory error? -

i new on ios,i have webservice , tring download 9000+ product info , have long json string,so got error message when products download,

malloc: * mmap(size=1978368) failed (error code=12) error: can't allocate region ** set breakpoint in malloc_error_break debug

i tried download below 1000 product info , working well. think, memory problem.

this code part of project.

-(void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname{  if (temp!=nil && ![temp isequal:@""]) {     //basliklar arrayine ilgili tek haberin basligini aktariyoruz.     //nslog(@"temp=%@",temp);       nsdata *data = [nsjsonserialization jsonobjectwithdata:[temp datausingencoding:nsutf8stringencoding] options:0 error:nil];        urunadi=[data valueforkey:@"urunadi"];     urunno=[data valueforkey:@"urunno"];     koleksiyon=[data valueforkey:@"koleksiyon"];     kompozisyon=[data valueforkey:@"kompozisyon"];     grm=[data valueforkey:@"grm"];     urmid=[data valueforkey:@"urmid"];     en=[data valueforkey:@"en"];     islemtipi=[data valueforkey:@"islemtipi"];     dizim=[data valueforkey:@"dizim"];     kartelekodu=[data valueforkey:@"kartelekodu"];     siklik=[data valueforkey:@"siklik"];     euro=[data valueforkey:@"euro"];     dolar=[data valueforkey:@"dolar"];     sterlin=[data valueforkey:@"sterlin"];     tl=[data valueforkey:@"tl"];      [sharedmanager  getnewdbconnection];      if(![temp isequaltostring:@"false"]){          sqlite3 *contactdb;           nsarray *dirpaths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);         nsstring *docsdir = [dirpaths objectatindex:0];         nsstring *databasepath = [[nsstring alloc] initwithstring: [docsdir stringbyappendingpathcomponent: sql]];          nsfilemanager *filemgr = [nsfilemanager defaultmanager];          if ([filemgr fileexistsatpath: databasepath ] == yes)         {             const char *dbpath = [databasepath utf8string];              if (sqlite3_open(dbpath, &contactdb) == sqlite_ok)             {                   nsstring *deletesql = [nsstring stringwithformat: @"delete tblkumasbilgi"];                  const char *sql_stmt = [deletesql utf8string];                  if(sqlite3_exec(contactdb, sql_stmt, null, null, null) == sqlite_ok)                 {                    // nslog (@"delete userdata succesful");                 }                 else                 {                     nslog(@"delete userdata fail");                 }                 //sqlite3_close(contactdb);             }             else             {                 nslog(@"failed open database");             }         }     }       if([temp isequaltostring:@"false"]){           [svprogresshud dismiss];          nsstring *warning = nslocalizedstring(@"warning",nil);         nsstring *check=nslocalizedstring(@"check user info",nil);         nsstring *okay=nslocalizedstring(@"ok", nil);          uialertview *alertviewuser = [[uialertview alloc] initwithtitle:warning                                                             message:check                                                            delegate:self                                                   cancelbuttontitle:okay                                                   otherbuttontitles:nil, nil];          [alertviewuser show];         alertviewuser.tag=1;         flag=no;      }     else{                  sqlite3 *contactdb;                  nsarray *dirpaths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);                 nsstring *docsdir = [dirpaths objectatindex:0];                 nsstring *databasepath = [[nsstring alloc] initwithstring: [docsdir stringbyappendingpathcomponent: sql]];                  nsfilemanager *filemgr = [nsfilemanager defaultmanager];      if ([filemgr fileexistsatpath: databasepath ] == yes)     {         const char *dbpath = [databasepath utf8string];          if (sqlite3_open(dbpath, &contactdb) == sqlite_ok)         {               (int = 0; < [urunno count]; i++) {                    nsstring *insertsql = [nsstring stringwithformat: @"insert tblkumasbilgi (urunadi,urunno,koleksiyon,kompozisyon,grm,urmid,en,islemtipi,dizim,kartelekodu,siklik,euro,dolar,sterlin,tl) values ('%@','%@','%@','%@','%@','%@','%@','%@','%@','%@','%@','%@','%@','%@','%@')", [urunadi objectatindex:i], [urunno objectatindex:i], [koleksiyon objectatindex:i], [kompozisyon objectatindex:i], [grm objectatindex:i], [urmid objectatindex:i], [en objectatindex:i], [islemtipi objectatindex:i],[dizim objectatindex:i],[kartelekodu objectatindex:i], [siklik objectatindex:i],[euro objectatindex:i],[dolar objectatindex:i],[sterlin objectatindex:i], [tl objectatindex:i]];                  //nslog(@"insert =%@",insertsql);              const char *sql_stmt = [insertsql utf8string];              if(sqlite3_exec(contactdb, sql_stmt, null, null, null) == sqlite_ok)             {                 //nslog (@"insert userdata succesful");             }             else             {                 nslog(@"insert userdata fail");             }          }         }         else         {             nslog(@"failed open database");         }         //sqlite3_close(contactdb);     }          [svprogresshud dismiss];         nsstring *warning = nslocalizedstring(@"warning", nil);         nsstring *datasuccesful=nslocalizedstring(@"data download succesfully", nil);         nsstring *okay=nslocalizedstring(@"ok", nil);           uialertview *alertviewdownload = [[uialertview alloc] initwithtitle:warning                                                             message:datasuccesful                                                            delegate:self                                                   cancelbuttontitle:okay                                                   otherbuttontitles:nil, nil];          [alertviewdownload show];         alertviewdownload.tag=2;           flag=no; }   tempelement=@""; 

} }

thank interest, , sorry bad english.

best regards.

either don't download @ once, or, if have to, download , save json disk. use json library gives parser (like this one) , parse json in parts.