You need to load your view controller from the storyboard, try this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"<YourStoryboardFileName>"
bundle:nil];
TermsViewController *termsVC = [storyboard instantiateViewControllerWithIdentifier:@"<TermsViewController Storyboard ID>"];
termsVC.signUpVC = self;
[self presentViewController:termsVC animated:YES completion:nil];