-(void)applicationWillResignActive:(UIApplication *)application
     {
         //write here code for save your data
     }

  -(void)applicationDidEnterBackground:(UIApplication *)application
    {
       //write here code for save your data
    }
  -(void)applicationWillTerminate:(UIApplication *)application
   {
     //write here code for save your data
   }

[classobj saveHere];