iOS 13 splash animation doesn't execute on some versions of Xcode

[WilliamNHarvey]

transitionContext.view(forKey: ...) returns nil under some circumstances for iOS 13. There appear to be multiple workarounds

Simplest fix for this app is probably rewriting SplashViewController lines 79-80 as:

        guard let fromView = transitionContext.viewController(forKey: .from)?.view,
            let toView = transitionContext.viewController(forKey: .to)?.view else {