The back button text color changed from transparent to black.

[y-okudera]

Hi, @andreamazz
Thank you for the cool library.

After hiding the navigation bar, the back button text color changed from transparent to black.
And I solved the problem.

Before	After

Updating the navigation appearance in sample app is the following.

extension UINavigationController {
    func setupCustomNavigation() {
        let clear = [NSAttributedString.Key.foregroundColor: UIColor.clear]

        if #available(iOS 13.0, *) {
            let barAppearance = UINavigationBarAppearance()

            // Hide back button title.
            let barButtonAppearance = UIBarButtonItemAppearance()
            barButtonAppearance.normal.titleTextAttributes = clear
            barButtonAppearance.highlighted.titleTextAttributes = clear
            barAppearance.backButtonAppearance = barButtonAppearance

            // Set NavigationBar background color.
            barAppearance.backgroundColor = .yellow

            self.navigationBar.standardAppearance = barAppearance
            self.navigationBar.isTranslucent = false
        }
        else {
            // Hide back button title.
            UIBarButtonItem
                .appearance(whenContainedInInstancesOf: [UINavigationBar.self])
                .setTitleTextAttributes(clear, for: .normal)

            UIBarButtonItem
                .appearance(whenContainedInInstancesOf: [UINavigationBar.self])
                .setTitleTextAttributes(clear, for: .highlighted)

            // Set NavigationBar background color.
            self.navigationBar.barTintColor = .yellow
            self.navigationBar.isTranslucent = false
        }
    }
}

Best regards,

[y-okudera]

This issue also occurs on non-iOS 13, so I updated the title.

[andreamazz]

Nice catch, thanks for your contribution!