title: NSInvalidArgumentException', reason: 'Unable to parse the format string "userName like %@ password like %@"'
body: <h2>Heading</h2>
  
  <p>I am trying to fetch the data from sql file but I keep getting the NSInvalidArgumentException. 
  I will really appreciate if somebody can help me figure out.</p>
  
  <pre><code>- (IBAction)signIn:(id)sender {
      //Creating a fetch request
      AppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];
      //Create NSManagedObjectContext instance
      NSManagedObjectContext *context = [appDelegate managedObjectContext];
      NSEntityDescription  *entity = [NSEntityDescription entityForName:@"User" inManagedObjectContext:context];
      NSFetchRequest *request = [[NSFetchRequest alloc]init];
      [request setEntity:entity];
      NSPredicate *predicate= [NSPredicate predicateWithFormat:@"userName like %@ password like %@",self.username_signin.text, self.password_signin.text];
      [request setPredicate:predicate];
      NSError *error;
  
  }
  </code></pre>