问题
I have a table with cells that the user may swipe to mark them "completed". I am trying to make this accessible using VoiceOver by implementing the accessbilityScroll method.
This works fine, but I can't figure out what cell has focus when the user scrolls.
I only find information on how to change focus.
回答1:
Hehe, Ok. I just figured it out.
There is a protocol for this. Its called UIAccessibilityFocus
Method: accessibilityElementDidBecomeFocused:
Well, I will leave this question here to any one else that is out there struggling with this.
回答2:
Your program can also tell where VoiceOver’s “focus” (the object that it’s dealing with) is, and when “focus” enters or leaves any given object.
For Focus Information click here
– accessibilityElementDidBecomeFocused
– accessibilityElementDidLoseFocus
– accessibilityElementIsFocused
回答3:
As of iOS9, you can use
UIAccessibilityFocusedElement(UIAccessibilityNotificationVoiceOverIdentifier)
https://developer.apple.com/documentation/uikit/1615119-uiaccessibilityfocusedelement
来源：https://stackoverflow.com/questions/20498678/how-do-i-get-the-currently-focused-element-when-using-voiceover-on-ios