I did it in viewWillAppear(_ animated: Bool) { ... } and it worked. No luck if i did it in viewDidLoad()..

Putting in viewWillAppear also worked for me, but I think it depends on where you put your rootViewController setup code in your createNavController function. Ensure that your rootViewController setup code (title and bar color I believe) is added **after** instantiating your Nav Controller. That makes sense, since if we setup before the nav controller is created, the setup is not picked up for the root

If you define your imageView outside of your class, this will happen. I made the same mistake at first before I did a face slap.

I'm trying to hide the navigation bar entirely. Neither line of code works. The nav bar is present both on the Today screen on the screen that presents when a user clicks one of the collection view cells. Not sure why it's not working... ?

Here is what worked for me. override func viewWillAppear(_ animated: Bool) { navigationController?.setNavigationBarHidden(true, animated: false) }

I found this on Stack Overflow: https://stackoverflow.com/questions/27919620/how-to-load-gif-image-in-swift You'd have to check it out to see if it worked like you wanted!