ios - preferredStatusBarStyle 不工作

Question

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Answer 1

这里是 Apple Guidelines/Instruction关于状态栏的变化。

如果你想设置状态栏样式，那么在你的.plist文件中将UIViewControllerBasedStatusBarAppearance设置为NO。在您的 appdelegate > didFinishLaunchingWithOptions 中添加以下代码(您可以通过应用程序委托(delegate)以编程方式完成)。

Objective-C

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    application.statusBarStyle = .lightContent
    return true
}

---

如果要设置状态栏样式，请在 View Controller 级别执行以下步骤:

1. 如果您只需要在 UIViewController 级别设置状态栏样式，请在 .plist 文件中将 UIViewControllerBasedStatusBarAppearance 设置为 YES。

2. 在 viewDidLoad 中添加函数 - setNeedsStatusBarAppearanceUpdate

3. 在您的 View Controller 中覆盖 preferredStatusBarStyle。

Objective-C

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setNeedsStatusBarAppearanceUpdate];
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

swift

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。

---

您可以在应用程序启动期间或 View Controller 的 viewDidLoad 期间为状态栏设置背景颜色。

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
    }

}

这是结果:

---