Finally, to update a record, it is much simpler than you think, thanks to the abstraction layer. To update data, we just assign the values to our customer object in the (IBAction)save:(id)sender method, which you saw earlier:
if (customer)//if we showing existing customer data
{
NSNumber *age = [NSNumber numberWithInt:[[ageTxtField text] intValue]];
[customer setValue:[nameTxtField text] forKey:@"name"];
[customer setValue:age forKey:@"age"];
[customer setValue:[addressTxtField text] forKey:@"address"];
[customer setValue:[emailTxtField text] forKey:@"email"];
[customer setValue:[phoneTxtField text] forKey:@"phone_number"];
}We will add the following code after we set the values of our customer object:
NSError *error = nil;
// Save the object to persistent store
NSString *str;
if (![context save:&error]) {
str = [NSString stringWithFormat:@"Error saving %@ with localized description %@", error, [error...