CODEWITHSUNDEEP
ios
Andrew
Andrew

Reputation: 238647

How to correctly override supportedInterfaceOrientations in a Navigation Controller iOS 10?

I am subclassing UINavigationController and overriding the supportedInterfaceOrientations method. In that method, I delegate to the visibleViewController.supportedInterfaceOrientations.
However, when I present a UIImagePickerController modally, then visibleViewController is nil.
Something changed in iOS 10 causing visibleViewController to return nil.
If I change the code to use presentedViewController it correctly returns the UIImagePickerController.

Is this the correct change to make? Why did this change?

Upvotes: 1

Views: 296

Answers (1)

l'L'l
l'L'l

Reputation: 47159

It sounds like you could use setOverrideTraitCollection(_:forChildViewController:) — — ( I would imagine you could implement something similar with the UIImagePickerController ):

func setOverrideTraitCollection(_ collection: UITraitCollection?, 
     forChildViewController childViewController: UIViewController)

Normally, traits are passed unmodified from the parent view controller to its child view controllers. When implementing a custom container view controller, you can use this method to change the traits of any embedded child view controllers to something more appropriate for your layout. Making such a change alters other view controller behaviors associated with that child. For example, modal presentations behave differently in a horizontally compact versus horizontally regular environment. You might also make such a change to force the same set of traits on the child view controller regardless of the actual trait environment.

↪︎ Video Presentation from WWDC 2016 : Making Apps Adaptive, Part 1 and 2

Apple has recommended to use the newer APIs UITraitCollection and UITraitEnvironment over trying to adapt supportedInterfaceOrientations moving forward...

Upvotes: 1

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