VoiceOver focus jumping around when adding UIViewController as Child to another UIViewController

Question

Created Oct ’24

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I'm facing an accessibility issue, where when I call UIViewController.addChild(_:) and pass in another instance of a UIViewController, the VoiceOver focus is jumping to the "Back" button in the navigation bar. How might one go about avoid this behaviour and having the accessibility/voiceover focus remain where it was at the time of adding the child?

Answered by able_ios_dev in 807333022

I was able to brute force the system into not doing this by calling

parent.navigationController?.navigationBar.accessibilityElementsHidden = true
parent.view.accessibilityElementsHidden = true
parent.addChild(self)
parent.view.addSubview(self.view)
self.didMove(toParent: parent)

Later on, once I've configured my view a little, and then presented the child view I reset all the values using the following:

DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) { [weak self] in
parent.navigationController?.navigationBar.accessibilityElementsHidden = false
                parent.view.accessibilityElementsHidden = false
                UIAccessibility.post(notification: .layoutChanged, argument: SOME_UI_VIEW)
}

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Answer 1

able_ios_dev OP

Oct ’24

Accepted Answer

I was able to brute force the system into not doing this by calling

parent.navigationController?.navigationBar.accessibilityElementsHidden = true
parent.view.accessibilityElementsHidden = true
parent.addChild(self)
parent.view.addSubview(self.view)
self.didMove(toParent: parent)

Later on, once I've configured my view a little, and then presented the child view I reset all the values using the following:

DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) { [weak self] in
parent.navigationController?.navigationBar.accessibilityElementsHidden = false
                parent.view.accessibilityElementsHidden = false
                UIAccessibility.post(notification: .layoutChanged, argument: SOME_UI_VIEW)
}

0