Core Data XCode8.0 & later, ios 10.0 & later version...

Core Data Xcode 8.0 & later, ios 10.0 & later version ...

@property AppDelegate *appDelg;

@property NSEntityDescription *enterTextED;

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    

   _appDelg = (AppDelegate *)[[UIApplication sharedApplication]delegate];

   _enterTextED = [NSEntityDescription entityForName:@"Data" inManagedObjectContext:_appDelg.persistentContainer.viewContext];

}

// To Save Data

-(void) SaveData {

 _appDelg = (AppDelegate *)[[UIApplication sharedApplication]delegate];

   _enterTextED = [NSEntityDescription entityForName:@"Data" inManagedObjectContext:_appDelg.persistentContainer.viewContext];

 NSManagedObject *managedObject = [[NSManagedObject alloc]initWithEntity:_enterTextED insertIntoManagedObjectContext:_appDelg.persistentContainer.viewContext];

        [managedObject setValue:_enterTextTF.text forKey:@"enterText"];

        

    NSError *errorObj;

    [_appDelg.persistentContainer.viewContext save:&errorObj];

}

// To Fetch Data

-(void) FetchData {

_appDelg = (AppDelegate *)[[UIApplication sharedApplication]delegate];

    

    NSFetchRequest * fetchReq = [NSFetchRequest fetchRequestWithEntityName:@"Data"];

    NSError * fetchErrorObj;

    storedData = [_appDelg.persistentContainer.viewContext executeFetchRequest:fetchReq error:&fetchErrorObj];

    NSLog(@"array count is %lu",storedData.count);

}