xcode 优选状态栏样式不起作用

preferredStatusBarStyle is not working

提问by Sarah

I used to use setStatusBarStylein my project and it works fine, but it is deprecated so I use preferredStatusBarStyle, that didn't work. knowing that I've:

我曾经setStatusBarStyle在我的项目中使用它并且它工作正常，但它已被弃用，所以我使用preferredStatusBarStyle，这不起作用。知道我已经：

1. Call the method setNeedsStatusBarAppearanceUpdate.
2. Set "View controller-based status bar appearance" to NO in info.plist

3. Override the function

   • (UIStatusBarStyle)preferredStatusBarStyle { return UIStatusBarStyleLightContent; }

   this function is not called

1. 调用方法 setNeedsStatusBarAppearanceUpdate。
2. 在 info.plist 中将“基于控制器的状态栏外观”设置为 NO

3. 覆盖函数

   • (UIStatusBarStyle)preferredStatusBarStyle { return UIStatusBarStyleLightContent; }

   这个函数没有被调用

Note: I'm using navigation controller.

注意：我正在使用导航控制器。

回答by Krunal

Here is Apple Guidelines/Instructionabout status bar change.

这是有关状态栏更改的Apple 指南/说明。

If you want to set status bar style, application level then set UIViewControllerBasedStatusBarAppearanceto NOin your .plistfile. And in your appdelegate> didFinishLaunchingWithOptionsadd following ine (programatically you can do it from app delegate).

如果你想设置状态栏样式，应用的水平，那么设置UIViewControllerBasedStatusBarAppearance到NO您的.plist文件。并在您的appdelegate>didFinishLaunchingWithOptions添加以下ine（以编程方式，您可以从应用程序委托中完成）。

Objective C

目标C

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

Swift

迅速

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

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if you want to set status bar style, at view controller level then follow these steps:

如果要设置状态栏样式，请在视图控制器级别执行以下步骤：

1. Set the UIViewControllerBasedStatusBarAppearanceto YESin the .plistfile, if you need to set status bar style at UIViewController level only.

2. In the viewDidLoad add function - setNeedsStatusBarAppearanceUpdate

3. override preferredStatusBarStyle in your view controller.

1. 设置UIViewControllerBasedStatusBarAppearance到YES中.plist文件，如果需要设置状态栏样式仅UIViewController的水平。

2. 在 viewDidLoad 添加函数 - setNeedsStatusBarAppearanceUpdate

3. 覆盖视图控制器中的 preferredStatusBarStyle。

Objective C

目标C

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

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

Swift

迅速

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

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

Set value of .plist according to status bar style setup level.

根据状态栏样式设置级别设置 .plist 的值。

---

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You can set background color for status bar during application launch or during viewDidLoad of your view controller.

您可以在应用程序启动期间或视图控制器的 viewDidLoad 期间设置状态栏的背景颜色。

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
    }

}

Here is result:

这是结果：

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