ios - App 开启深色模式

Question

我的项目 (Swift) 中有一个 TableViewController 和一个 ViewController。我有一个开关可以改变我的应用程序的颜色(变暗)。问题是它只在我所在的场景中改变它。如果我去另一个场景，它是白色的。

我的代码:

import UIKit

class BaseTableViewController: UITableViewController {
    @IBOutlet var InicioTable: UITableView!
    @IBOutlet weak var cell2: UITableViewCell!
    @IBOutlet var viewTable: UITableView!
    @IBOutlet weak var celldarkmode: UITableViewCell!
    @IBOutlet weak var label: UILabel!
    @IBOutlet weak var switchController: UISwitch!

    @IBAction func changeSwitch(_ sender: UISwitch) {
        if switchController.isOn == true
        {
            self.navigationController?.navigationBar.isTranslucent = false
            self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]//user global variable
            self.navigationController?.navigationBar.barStyle = UIBarStyle.black //user global variable
            self.navigationController?.navigationBar.tintColor = UIColor.black //user global variable
            UIApplication.shared.statusBarStyle = .lightContent
            label.textColor = UIColor.white
            self.cell2.backgroundColor = UIColor.black
            self.tabBarController?.tabBar.barTintColor = UIColor.black
            view.backgroundColor = UIColor.init(red: 0.1, green: 0.1, blue: 0.1, alpha: 1.0)
        }
        else
        {
            self.navigationController?.navigationBar.isTranslucent = false
            self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]//user global variable
            self.navigationController?.navigationBar.barStyle = UIBarStyle.default //user global variable
            self.navigationController?.navigationBar.tintColor = UIColor.white //user global variable
            UIApplication.shared.statusBarStyle = .default
            label.textColor = UIColor.black
            self.cell2.backgroundColor = UIColor.white
            self.tabBarController?.tabBar.barTintColor = UIColor.white
            view.backgroundColor = UIColor.groupTableViewBackground
        }
    }
}

Answer 1

使用用户默认值将开关状态保存在您的应用中:

@IBAction func changeSwitch(_ sender: UISwitch) {
    let isDarkMode = userDefaults.bool(forKey: "isDarkMode")
    if isDarkMode == true {
        UserDefaults.standard.set(false, forKey: "isDarkMode")  // Set the state
    }
    else {
        UserDefaults.standard.set(true, forKey: "isDarkMode")  // Set the state
    }
}

---

然后将所有 View 更改代码移动到每个 View Controller 的viewDidLoad()，您希望在其中更改颜色:

override func viewDidLoad() {

    super.viewDidLoad()

    let isDarkMode = UserDefaults.standard.bool(forKey: "isDarkMode")  // Retrieve the state

    if isDarkMode == true {
        self.navigationController?.navigationBar.isTranslucent = false
        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]//user global variable
        self.navigationController?.navigationBar.barStyle = UIBarStyle.black //user global variable
        self.navigationController?.navigationBar.tintColor = UIColor.black //user global variable
        UIApplication.shared.statusBarStyle = .lightContent
        label.textColor = UIColor.white
        self.cell2.backgroundColor = UIColor.black
        self.tabBarController?.tabBar.barTintColor = UIColor.black
        view.backgroundColor = UIColor.init(red: 0.1, green: 0.1, blue: 0.1, alpha: 1.0)
    }
    else {
        self.navigationController?.navigationBar.isTranslucent = false
        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]//user global variable
        self.navigationController?.navigationBar.barStyle = UIBarStyle.default //user global variable
        self.navigationController?.navigationBar.tintColor = UIColor.white //user global variable
        UIApplication.shared.statusBarStyle = .default
        label.textColor = UIColor.black
        self.cell2.backgroundColor = UIColor.white
        self.tabBarController?.tabBar.barTintColor = UIColor.white
        view.backgroundColor = UIColor.groupTableViewBackground
    }
}