ios - Parsing JSON and save locally -

i'm working on ios application written in objective-c , i'm done, except 1 thing:

i'm parsing json tableview, , want store data locally in app. don't know best way of doing this. each row has image, title, description, , link. have different tabs different json.

(i don't want parse json every time app opens up, want check if new has been added json , parse again. i'm happy if can manage save data json locally)

i've been struggling while , need help. last thing need fix before app ready app store.

don't know if need see code, post anyway might better understanding of i'm doing.

code parsing json:

 jsondata_ = [[nsmutabledata alloc] init];     nsstring *urlstring = [nsstring stringwithformat:@"http://www.myurl.se/json/%@.json", _whatstate];     nsurl *url = [nsurl urlwithstring: urlstring];     nsurlrequest *urlreq = [nsurlrequest requestwithurl: url];     nsurlconnection *connection = [nsurlconnection connectionwithrequest: urlreq delegate:self];   -(void)connectiondidfinishloading:(nsurlconnection*) connection{      //nslog(@"succeeded! recieved %d bytes of data", [jsondata_ length]);     nserror *error;     nsarray *items = [nsjsonserialization jsonobjectwithdata: jsondata_ options: kniloptions error: &error];      nssortdescriptor *sortdesc = [[[nssortdescriptor alloc] initwithkey:@"title" ascending:yes]copy];     nsmutablearray *sorteditems = [nsmutablearray arraywithobject: sortdesc];     sorteditems = [[items sortedarrayusingdescriptors: sorteditems] copy];      if(!error)     {         tabledata_ = sorteditems;         tableimgs_ = [[nsmutablearray alloc] initwitharray: tabledata_ copyitems: yes];         [self.tableview reloaddata];         jsonisfinishedloading = true;      }     else     {         nslog(@"error");     } } 

code tableview:

-(uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {      static nsstring *cellidentifier = @"listitem";     tscustomcell *cell = (tscustomcell*) [tableview dequeuereusablecellwithidentifier:cellidentifier forindexpath:indexpath];     [cell setselectedbackgroundview:selectedcellbgcolorview];       if(jsonisfinishedloading)     {         nsdictionary *row = [tabledata_ objectatindex: indexpath.row];         nsstring *title = [row objectforkey:@"title"];          cell.url = [row objectforkey:@"url"];         uifont *defaultfont = [uifont fontwithname:@"edmondsans-bold" size:12.0];          [cell.listitemlbl settext: title];         [cell.listitemlbl setfont:defaultfont];           if([[tableimgs_ objectatindex:indexpath.row] ismemberofclass: [uiimage class]])             {                 [cell.listitemimage setimage: [tableimgs_ objectatindex: indexpath.row]];             }             else             {                  uiactivityindicatorview *loadingsymbol = [[uiactivityindicatorview alloc] initwithactivityindicatorstyle: uiactivityindicatorviewstylegray];                 loadingsymbol.frame = cell.listitemimage.frame;                 [cell addsubview: loadingsymbol];                 [loadingsymbol startanimating];                   dispatch_queue_t queue = dispatch_get_global_queue(dispatch_queue_priority_default, 0ul);                  dispatch_async(queue, ^{                       nsstring *url = [row objectforkey: @"image"];                      if([url isequaltostring: @""])                     {                         url = @"http://www.myurl.se/images/standard.png";                     }                     else                     {                         url = [row objectforkey: @"image"];                     }                      nsurl *imgurl = [nsurl urlwithstring: url];                     nsdata *imagedata = [nsdata datawithcontentsofurl: imgurl];                     uiimage *image = [uiimage imagewithdata: imagedata];                      if(image != nil)                     {                         [tableimgs_ replaceobjectatindex:indexpath.row withobject:image];                         nslog(@"tableimgs != nil");                      }                     else                     {                         nslog(@"tableimgs = nil");                         [cell.listitemimage setimage: [uiimage imagenamed:@"standard_transp.png"]];                     }                      dispatch_sync(dispatch_get_main_queue(), ^{                          [loadingsymbol removefromsuperview];                         [tableview reloadrowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation: uitableviewrowanimationnone];                       });                   }); //end dispatch_async             }         }     }       return cell;  } 

thanks!!

if understood correct - can save data json user defaults code

[[nsuserdefaults standarduserdefaults] setobject:jsondata_ forkey:@"mydata"]; 

if parsing json - have data it

when want

jsondata_ = [[nsuserdefaults standarduserdefaults] valueforkey: @"mydata"];