How to set Accessibility focus to button programmatically in iOS

问题

In iOS, how to set accessibility focus to a button through programmatically?

回答1:

You can do this via following notifications:

UIAccessibilityLayoutChangedNotification

or

UIAccessibilityScreenChangedNotification

E.g.

UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, yourElement);

回答2:

@ClemensL response works great. Here is a Swift 5 version:

func setAccessibilityFocus() {
    UIAccessibility.post(notification: UIAccessibility.Notification.layoutChanged, argument: self)
}

来源：https://stackoverflow.com/questions/21661443/how-to-set-accessibility-focus-to-button-programmatically-in-ios