how to lock portrait orientation for only main view using swift

Question

I have created an application for iPhone, using swift, that is composed from many views embedded in a navigation controller. I would like to lock the main v

Answer 1

Same JasonJasonJason answer in Swift 4.2+ (It worked correctly with iOS 11)

1- Override shouldAutorotate and supportedInterfaceOrientations as shown below.

extension UINavigationController {

open override var shouldAutorotate: Bool {
    return true
}

open override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return (visibleViewController?.supportedInterfaceOrientations)!
    }
}

2- And your main viewcontroller (portrait at all times), should have:

 public override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.portrait
}

3- Then, in your subviewcontrollers that you want to support portrait or landscape:

 public override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.all
}