CODEWITHSUNDEEP
iosstatusbar
Md1079
Md1079

Reputation: 1360

prefersStatusBarHidden not called

I have a UITabViewController -> UINavigationController -> UIViewController and want to hide and unhide the statusBar. when I call setNeedsStatusBarAppearanceUpdate() the method prefersStatusBarHidden is not called. 

func fadeOutStatusBar (notification: NSNotification) {
    statusBarHidden = true
    self.setNeedsStatusBarAppearanceUpdate()
}

func fadeInStatusBar (notification: NSNotification) {
    statusBarHidden = false
    self.setNeedsStatusBarAppearanceUpdate()
}

override func prefersStatusBarHidden() -> Bool {
    return statusBarHidden
}

Upvotes: 33

Views: 29697

Answers (9)

Farras Doko
Farras Doko

Reputation: 537

You just simply need to hide the navigation controller and the statusBar will also hidden.

try this viewDidLoad example

override func viewDidLoad() {
    super.viewDidLoad()
    navigationController?.setNavigationBarHidden(false, animated: false)
}

Upvotes: 0

JackySong
JackySong

Reputation: 164

When we nested the UINavigationController, our AppDelegate. Window. RootViewController Usually we create navigationController when first will call in the navigationController childViewControllerForStatusBarHidden function, because the default returns nil, then is called navigationController prefersStatusBarHidden function itself, So the status bar that we set in viewController through the prefersStatusBarHidden function will not be called, so it won't work. So we're going to create our own one that inherits from the NavigationController,in this subclass ChildViewControllerForStatusBarHidden function.

If you are using a UINavigationController as your window.rootViewController from your AppDelegate, then you might want to extend UINavigationController in order to call its topViewController's prefersStatusBarHidden:

class YourNavigationController: UINavigationController {
    override var childForStatusBarHidden: UIViewController? {
        return topViewController
    }
}

Upvotes: 12

Ely
Ely

Reputation: 9131

Property prefersStatusBarHidden is being called on the root view controller of the current view controller.

This means that if your app is based on a UISplitViewController for example, you must implement the property in a custom UISplitViewController class.

Upvotes: 2

xiao333ma
xiao333ma

Reputation: 101

If you have other window not hidden, the method not be called. Just hide other window, it will work as you wish

Upvotes: 1

idej1234
idej1234

Reputation: 63

For Swift 4.2 iOS 12

Assuming you have a ViewController contained within UINavigationController. Create your own Subclass of UINavigationController and include in it: 

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

Make sure info.plist sets View Controller based setting of status bar

Upvotes: 1

Nghia Luong
Nghia Luong

Reputation: 790

Firstly, View controller-based status bar appearance in the .plist file must be set to YES.

  • If you want status bar to be hidden in the whole app:

For Objective-C:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [application setStatusBarHidden:YES];

    return YES;
}

For Swift:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject:AnyObject]?) -> Bool {
    application.statusBarHidden = true

    return true
}
  • If you want status bar is disappeared in Specify View Controller, in .m file, just implement:

For Objective-C:

- (BOOL)prefersStatusBarHidden {
    return YES;
}

For Swift:

override func prefersStatusBarHidden() -> Bool {
    return true
}

Upvotes: 40

Barrett
Barrett

Reputation: 323

For swift 3, first, make sure that View controller-based status bar appearance is set to YES in your Info plist file

screenshot

And then just add this to your view controller:

override var prefersStatusBarHidden: Bool {
    get {
        return true
    }
}

I hope this helps people in the future.

Upvotes: 16

TheEye
TheEye

Reputation: 9346

Maybe not a solution to the OP problem, but what could also be the cause for prefersStatusBarHidden not being called is if you have used a second window in your app delegate, eg for displaying a splash screen, and you did not hide it after the splash was shown - then that window gets the events that lead to calling these functions.

Upvotes: 11

Md1079
Md1079

Reputation: 1360

Figured it out. in info.plist file: view controller-status bar appearance should be set to YES

Upvotes: 24

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