I have created a new storyboard named "Start.storyboard", but when I change Main Interface to "Start" nothing happened, The app just started with default storyboard "Main.storyboard". I'm using Xcode 11.2.1 and iOS 13.2.3
Also I have tried to change the rootViewController from (AppDelegate) didFinishLaunchingWithOptions as the code below:
let sb = UIStoryboard(name: "Start", bundle: nil)
let vc = sb.instantiateViewController(withIdentifier: "PhoneVC")
self.window?.rootViewController = vc
but I got the same result, Main storyboard can't be changed.