Question

I am creating doing a project with core data.

Now my first view is Login/password in table view controller.

As soon as the user hits done, i want my app to compare the login and password text fields with the Entity Login (with attributes : userid and password) and then display another view with the informations associated with that user (1 to 1) relationship.

Can any one help me with how to validate the login password and then display only the information associated with that user?

Any help would be really appreciated. I am totally new to this.

Answer 1

You need to create a Fetch request against that Entity (you will need to modify this to fit your specific needs:

NSFetchRequest *request= [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Entity" inManagedObjectContext:context];
NSPredicate *predicate =[NSPredicate predicateWithFormat:@"username==%@ AND password==%@",self.UsernameTextField.Text, self.PasswordTextField.Text];
[request setEntity:entity];
[request setPredicate:predicate];

… Do whatever you need to with the result (NSArray)