UIViewController In-Call Status Bar Issue

Issue:

Modally presented view controller does not move back up after in-call status bar disappears, leaving 20px empty/transparent space at the top.

Normal : No Issues

In-Call : No Issues

After In-Call Disappears:

Leaves a 20px high empty/transparent space at top revealing orange view below. However the status bar is still present over the transparent area. Navigation Bar also leaves space for status bar, its' just 20px too low in placement.

• iOS 10 based
• Modally presented view controller
• Custom Modal Presentation
• Main View Controller behind is orange
• Not using Autolayout
• When rotated to Landscape, 20px In-Call Bar leaves and still leaves 20px gap.
• I opt-out showing status bar in landscape orientations. (ie most stock apps)

I tried listening to App Delegates:

willChangeStatusBarFrame
didChangeStatusBarFrame

Also View Controller Based Notifications:

UIApplicationWillChangeStatusBarFrame
UIApplicationDidChangeStatusBarFrame

When I log the frame of presented view for all four above methods, the frame is always at (y: 0) origin.

Update

View Controller Custom Modal Presentation

    let storyboard = UIStoryboard(name: "StoryBoard1", bundle: nil)
    self.modalVC = storyboard.instantiateViewController(withIdentifier: "My Modal View Controller") as? MyModalViewController
    self.modalVC!.transitioningDelegate = self
    self.modalVC.modalPresentationStyle = .custom
    self.modalVC.modalPresentationCapturesStatusBarAppearance = true;
    self.present(self.modalVC!, animated: true, completion: nil)


    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let containerView = transitionContext.containerView
        let fromViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from)
        let toViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)
        toViewController!.view.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)

        UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.0, options: [.curveEaseOut], animations: { () -> Void in

            toViewController!.view.transform = CGAffineTransform.identity

        }, completion: { (completed) -> Void in

           transitionContext.completeTransition(completed)

        })
 }

Solution 1:

I've been looking for a solution for 3 days. I don't like this solution but didn't found better way how to fix it.

I'he got situation when rootViewController view has bigger height for 20 points than window, when I've got notification about status bar height updates I manually setup correct value.

Add method to the AppDelegate.swift

func application(_ application: UIApplication, didChangeStatusBarFrame oldStatusBarFrame: CGRect) {
        if let window = application.keyWindow {
            window.rootViewController?.view.frame = window.frame
        }
    }

After that it works as expected (even after orientation changes). Hope it will help someone, because I spent too much time on this.

P.S. It blinks a little bit, but works.

Solution 2:

I faced this problem too but after I put this method, problem is gone.

iOS has its default method willChangeStatusBarFrame for handling status bar. Please put this method and check it .

func application(_ application: UIApplication, willChangeStatusBarFrame newStatusBarFrame: CGRect) {
    UIView.animate(withDuration: 0.35, animations: {() -> Void in
        let windowFrame: CGRect? = ((window?.rootViewController? as? UITabBarController)?.viewControllers[0] as? UINavigationController)?.view?.frame
        if newStatusBarFrame.size.height > 20 {
            windowFrame?.origin?.y = newStatusBarFrame.size.height - 20
            // old status bar frame is 20
        }
        else {
            windowFrame?.origin?.y = 0.0
        }
        ((window?.rootViewController? as? UITabBarController)?.viewControllers[0] as? UINavigationController)?.view?.frame = windowFrame
    })
}

Hope this thing will help you.
Thank you

Solution 3:

I had the same issue with the personnal hospot modifying the status bar. The solution is to register to the system notification for the change of status bar frame, this will allow you to update your layout and should fix any layout issue you might have. My solution which should work exactly the same for you is this :

• In your view controller, in viewWillAppear suscribe to the UIApplicationDidChangeStatusBarFrameNotification

      NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(myControllerName.handleFrameResize(_:)), name: UIApplicationDidChangeStatusBarFrameNotification, object: nil)
  

• Create your selector method

  func handleFrameResize(notification: NSNotification) {
  self.view.layoutIfNeeded() }
  

• Remove your controller from notification center in viewWillDisappear

      NSNotificationCenter.defaultCenter().removeObserver(self, name: UIApplicationDidChangeStatusBarFrameNotification, object: nil)
  

• You also need your modal to be in charge of the status bar so you should set

  destVC.modalPresentationCapturesStatusBarAppearance = true before presenting the view.

You can either implement this on every controller susceptible to have a change on the status bar, or you could make another class which will do it for every controller, like passing self to a method, keep the reference to change the layout and have a method to remove self. You know, in order to reuse code.