How to Make APP in CoreData

  CORE DATA:

Important KeyWord :NSManagedObjectContext,PersistentStoreCoordinator,PersistentObjectStore

 important :database name is:Contacts 

 Attributes are :name,age,dob,address,sex

1.This Method used to get all values form database

-(NSManagedObjectContext *)managedObjectContext

{

    NSManagedObjectContext *context = nil;

    id delegate = [[UIApplication sharedApplication] delegate];

    if([delegate performSelector:@selector(managedObjectContext)])

    {

        context = [delegate managedObjectContext];

    }

    return context;

}

2.Do U want Fetch Data from database mean use this method

 NSManagedObjectContext *managedObjectContext = [self managedObjectContext];

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc]initWithEntityName:@"Contacts"];

    NSSortDescriptor *sortarray = [[NSSortDescriptor alloc]initWithKey:@"name" ascending:YES comparator:nil];

    [fetchRequest setSortDescriptors:[NSArray arrayWithObjects:sortarray, nil]];

   // NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name==%@",@"dhaya"];

   // [fetchRequest setPredicate:predicate];

    self.tableArray  = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];

3.Do u want insert value from database mean,use this method 

NSManagedObjectContext *context = [self managedObjectContext];

    

    NSManagedObject *newDevice = [NSEntityDescription insertNewObjectForEntityForName:@"Contacts" inManagedObjectContext:context];

    [newDevice setValue:_nameField.text forKey:@"name"];

    [newDevice setValue:_ageField.text forKey:@"age"];

    [newDevice setValue:_dobField.text forKey:@"dob"];

    [newDevice setValue:_addressField.text forKey:@"address"];

    [newDevice setValue:_sexField.text forKey:@"sex"];

    NSData *data = UIImagePNGRepresentation(_imageView.image);

    [newDevice setValue:data forKey:@"photo"];

    NSError *error = nil;

    

    if(![context save:&error])

    {

          NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);

    }

4.Do u want Delete value from database mean use this method

 NSManagedObjectContext *context = [self managedObjectContext];

   

   if (editingStyle == UITableViewCellEditingStyleDelete) {

       

       [context deleteObject:[self.tableArray objectAtIndex:indexPath.row]];

       NSError *error = nil;

       if(![context save:&error])

       {

           NSLog(@"Can't delete");

           return;

       }

       [self.tableArray removeObjectAtIndex:indexPath.row];

5.Do u want update value from database mean use this method

 [detailArray setValue:nameLabel.text forKey:@"name"];

6.Do u want sort from database mean use this method 

  NSSortDescriptor *sortarray = [[NSSortDescriptor alloc]initWithKey:@"name" ascending:YES comparator:nil];

    [fetchRequest setSortDescriptors:[NSArray arrayWithObjects:sortarray, nil]];

7.Do u want filter the OutPut from database mean use this method 

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name==%@",@"dhaya"];

    [fetchRequest setPredicate:predicate];

8.enjoy coding