How can I change constraints for different screen sizes programmatically?

Question

Hello I've just started programming and I'm trying to write with code instead of using the storyboard, but the constraints I added do not work at different screen sizes How do I solve this problem

Answer 1

Since you do it in the code, you can check the size class before adding any constraint like this:

if (self.view.traitCollection.horizontalSizeClass == .compact) {
    /* add needed constraints */
}

Also you can implement the traitCollectionDidChange: method to automatically be called when a trait changes due to autorotation.