CODEWITHSUNDEEP
iosiphoneios4accessibilityuiaccessibility-notification
John S
John S

Reputation: 1747

iOS change accessibility focus

Is there a way to set the accessibility focus programatically (App Store safe)? Any help will be greatly appreciated.

Upvotes: 55

Views: 61046

Answers (4)

marika.daboja
marika.daboja

Reputation: 1011

UIAccessibility.post(notification: .layoutChanged, argument: toast)
toast.becomeFirstResponder()
toast.isAccessibilityElement = true
toast.accessibilityTraits = .staticText //Traits option ie .header, .button etc
toast.accessibilityLabel = "Accessibility label to be read by VoiceOver goes here"

WHERE:

  • toast is my UIView (a pop up which gets triggered upon particular scenario)
  • above code needs to be added to the toast View
  • this code will automatically change focus to pop up view (toast) and VoiceOver will read accessibilityLabel

Upvotes: 0

Vlad
Vlad

Reputation: 5938

To focus on element you can call.

Swift:

UIAccessibility.post(notification: .screenChanged, argument: self.myFirstView)

ObjC:

UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, self.myFirstView);

Otherwise for iOS 8+ use the accessibilityElements to set element order and it will focus automatically on first element in the list

self.accessibilityElements = @[myFirstView, mySecondButton, myThirdLabel]

Upvotes: 75

Daniel Hjärtat Hjärtström
Daniel Hjärtat Hjärtström

Reputation: 121

extension UIAccessibility {
    static func setFocusTo(_ object: Any?) {
        if UIAccessibility.isVoiceOverRunning {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.8) {
                UIAccessibility.post(notification: .layoutChanged, argument: object)
            }
        }
    }
}

Add this extension and call it by passing in the view you would like to be focused. If you would like to change focus when navigating using a tabbar, you can call this from viewWillAppear. This code wont work in any init method without a the delay of 0.7 or more.

Upvotes: 12

vberihuete
vberihuete

Reputation: 184

This is the Swift code: 

UIAccessibility.post(notification: .screenChanged, argument: <theView>)

Example usage 

let titleLabel = UILabel()

override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        UIAccessibility.post(notification: .screenChanged, argument: titleLabel)
}

Upvotes: 2

Related Questions