How to implement DarkMode Into app in Swift - swift

Question

sorry if that question was asked but couldn't find the right answer across stackOverFlow so I'm asking ..
I'm trying to implement dark mode into my app, but unfortunately it doesn't work well for me while using tableviews, it does changes my background and stuff, but I can't change the color of my groups in my tableview.
Here's an image to illustrate the problem:
https://imgur.com/a/h4A3zOZ (can't upload it here cause its too big).
Also Here is my Code:
// MARK: - Premium Section - DarkMode + Graph:
#IBAction func darkModeSwitch(_ sender: UISwitch) {
let current = sender.isOn ? Theme.dark : Theme.light
if #available(iOS 13.0, *) {
// overrideUserInterfaceStyle = UIUserInterfaceStyle(rawValue: current.stateMode)!
//STEP1: Saving User Defaults Switcher:
saveSwitchToggleDarkMode(switcherState: sender.isOn)
//STEP2: Setting UI Colors Of Settings View:
self.tableView.backgroundColor = current.backgroundColor
///Setting up the barTint Color:
self.navigationController?.navigationBar.barTintColor = current.barTintColor
///Setting up the title text color:
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:current.textColor]
///Changing back color in navigation controller:
self.navigationController?.navigationBar.backItem?.backBarButtonItem?.tintColor = current.backItemColor
}
}

Answer 1

You should change the mode on the window's level to apply changes to all your controls e.g:
if #available(iOS 13, *) {
UIApplication.shared.delegate?.window??.overrideUserInterfaceStyle = .dark
}

Answer 2

An alternative (and perhaps easier) method to implement dark mode is to use the iOS dark mode feature that you can trigger in settings.If you want to implement this you can create a custom color set by going to your Assets.xcassets and pressing the plus mark on the bottom -> new color set. On the attributes inspector, name your color under name, and under Appearances, select 'Any, Light, Dark' now you will have a place for 3 different colors. Under Light, put the light mode color, on the dark, the dark mode color.
Then on the place where you wish to implement this color,you can change the color to your custom color in the storyboard like so :-
or you can change it in code with something like
myButton.backgroundColor = UIColor(named: "TestColor")
When the user triggers the Dark mode through their control center or settings, the app will also automatically change accordingly. You can test this by going to settings -> Developer -> Dark appearance or by going to Features -> Toggle Appearance or simply press Shift + Command + A
However this method means that you will not have an independent dark mode because it will only be triggered if the device itself is dark-mode enabled.