When you compile project, do you get some warnings in Issue Navigator advising to adapt to new settings ?

What is the question ? What are you trying to achieve ? What do you get, what did you expect ?

@AndyQ that effectively smells the bug…

Great. Didn't you get the error when running as I did ? Which version of Xcode (maybe they have improved error messages in Xcode 13RC). Good continuation and don't forget to close the thread.

10.12.6 is not a recent update. So the update is not MacOS. Have a look with Activity Monitor.

Still cannot reproduce. A short video could help show the issue.

I could not reproduce in simulator iOS 15.0. Do you get a crash ?

Reverse engineering the log to get the source code is not that easy 😉. You'd better post the code yourself.

As @robnotyou noted, if you type func view…, then it works and even provide template once you have accepted the proposal. But it is important it makes the difference between a mere call to the API and the declaration of API override.

Sorry, I missed your question. Code completion just tells you what is the API (or your own function or var) that could match. It does not intent to give a code template. Note that when you type super.vi… in the override, it is logical it proposes viewDidLoad().

I clarified the point. When I typed appearance.bar… I got a completion proposal but with a warning of deprecation that I ignored. I could then type appearance.barStyle = . and get the constants proposals. But later, that cause a compiler error…

But this seems to work:           self.navigationController?.navigationBar.barStyle = UIBarStyle.blackTranslucent. But as it is deprecated since iOS 13, you should use :           self.navigationController?.navigationBar.barStyle       = UIBarStyle.black           self.navigationController?.navigationBar.isTranslucent       = true. I also found this comprehensive analysis of the changes since iOS 13 :        h t t p s : / / sarunw.com/posts/uinavigationbar-changes-in-ios13/

I'm confused now: the screenshot is a real one, captured in Xcode. But now, I cannot repeat it ! All I can set is the backgroundColor:           let appearance = UINavigationBarAppearance()           appearance.backgroundColor = .green

Did you check on Xcode 13 RC ? Do you call func trimmingCharacters(in set: CharacterSet) -> String yourself or is it a system call ? Are you using PrivateFrameworks ?

What is it you cannot make work ? Open a new thread and post the complete code of your class with a detailed explanation of what doesn't work. For sure someone will help you.