选择暗模式后如何重新加载视图？

Question

Im using this pod for add dark mode to my app. https://github.com/draveness/NightNight

Its working well when I restart app again but I want to change theme inside of app. So, I added UISwitch to my sidepanel for user can change theme.

I added this codes for it and some colors changing well but some colors does not affect. For example NavigationBar background color is changing well but title color is not changing.

UISwitch Action:

@IBAction func switchMode(_ sender: UISwitch) {

        if sender.isOn {
            switcher.isOn =  true

                NightNight.theme = NightNight.Theme.night
                UITabBar.appearance().barTintColor = UIColor(hexString: "#141d27")
                UITabBar.appearance().isTranslucent = true
                UITabBar.appearance().tintColor = UIColor(hexString: "#6e00ff")
                UINavigationBar.appearance().tintColor = UIColor(hexString: "#6e00ff")
                UINavigationBar.appearance().isTranslucent = true
                UINavigationBar.appearance().barTintColor = UIColor(hexString: "#141d27")


            for window in UIApplication.shared.windows {
                for view in window.subviews {
                    view.removeFromSuperview()
                    window.addSubview(view)
                }
            }

                UserDefaults.standard.set("night", forKey: "colormode")



        } else {
            switcher.isOn =  false

            NightNight.theme = NightNight.Theme.normal
            UITabBar.appearance().barTintColor = UIColor.white
            UITabBar.appearance().isTranslucent = true
            UITabBar.appearance().tintColor = UIColor(hexString: "#6e00ff")
            UINavigationBar.appearance().tintColor = UIColor(hexString: "#6e00ff")
            UINavigationBar.appearance().isTranslucent = true
            UINavigationBar.appearance().barTintColor = UIColor.white

            for window in UIApplication.shared.windows {
                for view in window.subviews {
                    view.removeFromSuperview()
                    window.addSubview(view)
                }
            }

            UserDefaults.standard.set("normal", forKey: "colormode")


        }

    }

Normally gray text colors(User`s names and navigation title) must to be black in light mode, but they does not changed.

Answer 1

Use callback when view mode changes. Change your colors as expected.

override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
    // do whatever you want to do 
}

Answer 2

Check out RxSwift and RxCocoa. They can both be found here . They are Reactive Frameworks for Reactive Programming in Swift. You can create observables to change the color of views reactively, as needed.