Swift: Hide status bar on only one child view controller

Question

I have a problem when it comes to the status bar and hiding it.

The setup

I have a BaseViewController that has a slide out menu. This BaseViewController is also the root controller of the application [as set inside AppDelegate]:

window = UIWindow()
window?.makeKeyAndVisible()
window?.rootViewController = BaseController()

As soon as I select a menu item the BaseViewController is populated by the corresponding ViewController [after I embed it into a navigation controller].

Menu item A: ViewControllerA

Menu item B: ViewControllerB

Menu item C: ViewControllerC

Say that I select the Menu Item A (the following code takes place inside BaseViewController):

let activeVC = UINavigationController(rootViewController: ViewControllerA())
view.addSubview(activeVC.view)
addChild(activeVC)

When I select another menu item (say item B), I first remove the previous active view controller (in this case item A) and then I add the ViewControllerB the same way as I did with ViewControllerA:

This is how I remove the previous active view controller:

activeVC.view.removeFromSuperview()
activeVC.removeFromParent()

Manipulating the status bar in each view controller separately:

I set the View controller-based status bar appearance to YES in plist control the appearance of the status bar in every view controller:

Then I go into the ViewController I want to hide the status bar and I add the following code:

override var prefersStatusBarHidden: Bool {
    return true
}

The problem

If I want to hide the status bar inside any of the ViewController A, B, or C, I can't. Overriding the prefersStatusBarHidden and setting it to "true" will do nothing.

If I override the prefersStatusBarHidden and setting it to "true" into the BaseViewController, then the BaseViewController and also any of the ViewController A, B, and C will hide the status bar.

What I want

I want to be able to hide the status bar on ViewControllerB without hiding it on the rest. Also a million dollars, but I will settle with the solution!

Thanks in advance!

I think you may need to manually call setNeedsStatusBarAppearanceUpdate (developer.apple.com/documentation/uikit/uiviewcontroller/…) — oyvindhauge
– oyvindhauge, Commented Apr 23, 2019 at 21:14
Please don't show pictures of code. Replace the pictures of code with the actual code, just like you have in other parts of your question. — rmaddy
– rmaddy, Commented Apr 23, 2019 at 21:14
@oyvindhauge i did this inside ViewControllerB inside an animation block but it did not help. Maybe i did it wrong. How would you setup this? — christostsang
– christostsang, Commented Apr 23, 2019 at 21:31

beyowulf · Accepted Answer · 2019-04-23 22:07:55Z

3

You'll need to override var childForStatusBarHidden: UIViewController? for BaseController and for UINavigationController. For example:

override var childForStatusBarHidden: UIViewController? {
    return children.first
}

and

extension UINavigationController {

    open override var childForStatusBarHidden: UIViewController? {
        return topViewController
    }
}

answered Apr 23, 2019 at 22:07

beyowulf

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2 Comments

christostsang Over a year ago

Your response guided me to the right track and I figured it out. At first, I went into the BaseController and added what you suggested with a twist: I used "return children.last". Then inside the ViewControllerB I set the "prefersStatusBarHidded" to "true". But here is the catch: If your VC is embedded inside a navigation controller, and if you are using a device with no bezels (such as iPhone X) you need to remove the navigation bar for the status bar to be hidden. So I also used navigationController?.setNavigationBarHidden(true, animated: false). And now it works!

beyowulf Over a year ago

This is not strictly true. It is not necessary to hide the navigation bar to get the status bar hidden, though doing so likely triggers a status bar refresh. As other commenters have pointed out you can trigger a status bar refresh directly by calling setNeedsStatusBarAppearanceUpdate

Mussa Charles · Accepted Answer · 2022-12-08 08:04:34Z

0

I had a use case where I had to present a ViewController nested inside a navBar controller the only way which worked for me is adding the following on initilization of a presented ViewController.

modalPresentationCapturesStatusBarAppearance = true

answered Dec 8, 2022 at 8:04

Mussa Charles

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Swift: Hide status bar on only one child view controller

The setup

Manipulating the status bar in each view controller separately:

The problem

What I want

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The setup

Manipulating the status bar in each view controller separately:

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