To do a successful save using Core Data, you require:
NSManagedObjectNSManagedObjectContextNSPersistentStoreCoordinatorNSManagedObjectModel
So, in our screen that saves these variables into our Customer entity, the following code fragment does all the magic for the (IBAction)save:(id)sender method. This will enable us to save our data from a new customer or update an existing customer's information:
- (IBAction)save:(id)sender {
if ([nameTxtField text].length == 0)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Name must not be empty" delegate:self
cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
return;
}
NSString *name = [nameTxtField text];
NSString *phone = [phoneTxtField text];
NSString *email = [emailTxtField text];
NSString *address = [addressTxtField text];
int age = [[ageTxtField text] intValue];
...