How to make Segue Pass Data AND ONLY execute if certain criteria is met

Question

I have a Login page with a button. When I click on it, IF and ONLY IF the login was successful, I want to pass data to another class (using properties).

I have tried usi

Answer 1

Once prepareForSegue:sender: has been called, you can't stop the segue from happening.

You should check for the criteria and call the performSegueWithIdentifier method conditionally.

Answer 2

You connect the segue from the controller (not a button), and then after your condition is met, call performSegueWithIdentifier in code.