我必须为swift和导航控制器做些什么

extension UINavigationController {
    override open var preferredStatusBarStyle: UIStatusBarStyle {
       return .lightContent
    }   
}

以下是苹果关于状态栏更改的指导方针/说明。状态栏只允许显示暗&亮(而&黑)。

这里是-如何改变状态栏样式:

如果你想设置状态栏的风格，应用程序级别，然后设置UIViewControllerBasedStatusBarAppearance为NO在你的。plist文件。

如果你想在视图控制器级别设置状态栏样式，那么按照以下步骤:

如果你只需要在UIViewController级别设置状态栏样式，在.plist文件中将UIViewControllerBasedStatusBarAppearance设置为YES。 在viewDidLoad中添加函数setNeedsStatusBarAppearanceUpdate 重写视图控制器中的preferredStatusBarStyle。

-

override func viewDidLoad() {
    super.viewDidLoad()
    self.setNeedsStatusBarAppearanceUpdate()
}

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

根据状态栏样式设置级别设置.plist的值。

下面是一些在应用程序启动或视图控制器viewDidLoad期间更改/设置状态栏背景色的技巧。

extension UIApplication {

    var statusBarView: UIView? {
        return value(forKey: "statusBar") as? UIView
    }

}

// Set upon application launch, if you've application based status bar
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        UIApplication.shared.statusBarView?.backgroundColor = UIColor.red
        return true
    }
}


or 
// Set it from your view controller if you've view controller based statusbar
class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        UIApplication.shared.statusBarView?.backgroundColor = UIColor.red
    }

}

结果如下:

对我来说，什么都没用。我试图改变状态栏颜色在ViewController2，这是嵌入在NavigationController，这反过来，从ViewController1被模态地呈现。这种方法行不通:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .darkContent
}

什么都没有发生，直到我找到了这个解决方案: 将这一行添加到ViewController1

导航控制器。modalPresentationCapturesStatusBarAppearance = 真正的

let navigationController = UINavigationController(rootViewController: viewController2)
navigationController.modalPresentationStyle = .overFullScreen
navigationController.modalTransitionStyle = .crossDissolve           
navigationController.modalPresentationCapturesStatusBarAppearance = true
self.present(navigationController, animated: true)

所以如果你的导航方案类似于ViewController1呈现的ViewController2，尝试modalPresentationCapturesStatusBarAppearance属性呈现的一个

文档:

The default value of this property is false. When you present a view controller by calling the present(_:animated:completion:) method, status bar appearance control is transferred from the presenting to the presented view controller only if the presented controller's modalPresentationStyle value is UIModalPresentationStyle.fullScreen. By setting this property to true, you specify the presented view controller controls status bar appearance, even though presented non-fullscreen. The system ignores this property’s value for a view controller presented fullscreen.

总结一下，编辑你的项目信息。Plist并添加:

基于视图控制器的状态栏外观:NO

状态栏样式:不透明的黑色样式

或者如果你有raw key/value plist

uiviewcontrollerbasedstatusbar外观:NO

UIStatusBarStyle:不透明黑色风格

在Swift 5的例子中，我添加了这些行:

override func viewDidAppear(_ animated: Bool) {
    navigationController?.navigationBar.barStyle = .black
}

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

在信息。plist设置“视图基于控制器的状态栏外观”为NO

在AppDelegate中添加

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];