Question

Since setStatusBarHidden is deprecated, we will be using preferredStatusBarHidden in UIViewControllers. But, how do I hide and show easily in a object class or custom UITableviewCell class. We used to hide show using UIApplication like this

[[UIApplication sharedApplication] setStatusBarHidden:YES];

Now it is deprecated and it can be used only in UIViewControllers, is there a way to hide them in custom tableview cells and NSObject classes?

Answer 1

prefersStatusBarHidden是UIViewController对象而不是UIApplication对象的方法。因此，您应该在UIViewController上进行设置。这样。

- (BOOL)prefersStatusBarHidden {

   return NO;
}

注意：

如果您更改此方法的返回值，请调用setNeedsStatusBarAppearanceUpdate方法。
对于childViewController，要指定子视图控制器应控制首选状态栏的隐藏/未隐藏状态，请实施childViewControllerForStatusBarHidden方法。

如果要更动态地隐藏或显示状态栏

您可以应用这样的逻辑

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { shouldHideStatusBar = (shouldHideStatusBar)? NO: YES; [self setNeedsStatusBarAppearanceUpdate]; }

您也可以将此代码添加到按钮事件中

确保将添加到您的info.plist中的“基于视图控制器的状态栏外观”设置为YES，否则似乎无法正常工作。

Answer 2

基本上，您只需要一个基本VC，您就可以在要控制状态栏的VC中对其进行子类化。在其中，您将订阅给定的通知，该通知在发送时将控制VC的状态栏。

以下是代码：

extension Notification.Name {
    static var statusBarShowHide: Notification.Name {
        return .init(rawValue: "StatusBar.showHide")
    }
}

class StatusBarControllableVC : UIViewController {

    private var statusBarHidden = false

    private func topViewController() -> UIViewController? {
        var topController = UIApplication.shared.keyWindow?.rootViewController
        while topController?.presentedViewController != nil {
            topController = topController?.presentedViewController
        }
        return topController
    }

    override var prefersStatusBarHidden: Bool {
        return statusBarHidden
    }

    @objc func statusBarShowHide(notification: NSNotification) {
        guard let userInfo = notification.userInfo else {return}
        let topController = topViewController()

        if let hidden = userInfo["hidden"] as? Bool, self == topController {
            statusBarHidden = hidden
            self.setNeedsStatusBarAppearanceUpdate()
        }
    }

    override func viewDidLoad() {
        NotificationCenter.default.addObserver(self, selector: #selector(statusBarShowHide(notification:)), name: .statusBarShowHide, object: nil)
        super.viewDidLoad()
    }
}

现在，每当需要显示或隐藏状态栏时，您都将像这样发布通知：

NotificationCenter.default.post(name: .statusBarShowHide, object: nil, userInfo: ["hidden":true])

我相信这是最简单的方法。在上面的代码中，我只显示/隐藏“顶部”视图控制器上的状态栏，但是显然您可以更改它

preferredStatusBarHidden in custom cell and object class

2 个答案: