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In fact, things can get really messed up if you don’t. That said, there are scenarios when it’s necessary to override this value. Unless you’re an accessibility expert versed in the nuance of WCAG 2.0 it’s probably safest just to let iOS do it’s thing. In general the default values of this property are accurate. So you’re probably wondering….now what? Overriding isAccessibilityElement Setting this property to NO means that VoiceOver will ignore it completely! This is the default behavior for base UIView elements, custom controls that inherit straight from UIView, and other view elements that act as collections for other child elements. And it doesn’t even matter what traits the element has, or how detailed the label you’ve given it. If you’re using gesture-based navigation the element will be skipped over completely. If a user swipes their finger over the element it won’t be highlighted. If this property is set to NO VoiceOver will treat the element like it’s not there at all. Then, after a pause, it’ll read out the hint.

Once an element is highlighted, VoiceOver will go through its process of announcing the label and read off any trait information. The other way is to swipe right or left across the screen rapidly, which will cause VoiceOver to highlight Accessibility Elements in order, just like hitting tab on a keyboard. The first is by hovering over any pixel within the bounds of the element. There are two ways a user can use VoiceOver to interact with these kinds of elements. This is the default value for any control that presents information (think UIButton, UIImageView, UILabel, etc). Let’s assume that isAccessibilityElement is set to YES. Instead, iOS sends a simplified set of information that’s comprised of the information iOS highlights as important for accessibility purposes. So VoiceOver doesn’t have access to the actual UIView objects you’ve created. Now VoiceOver itself runs on a separate process from your application. The isAccessibilityElement property allows you to control the information that iOS communicates between your application and VoiceOver. And I’m not just talking about causing minor issues, I mean complete catastrophic failure. It’s really easy to go wrong with this property, and in turn break the accessibility of your application. The isAccessibilityElement property is one of the most important. When you’re implementing accessibility there are a few different properties iOS gives you access to. You can find examples of the concepts discussed in this post (and much more) in our open source iOS application Deque University for iOS.

An interesting issue involving nesting accessibility elements.

Scenarios when it’s necessary to override this property.

What the isAccessibilityElement property actually does.

You’ll also understand why simply setting the accessibility element to NO isn’t the right approach. That’s what I’m going to cover in this post – in detail – so you’ll be able to handle whatever issues come up. It might seem like a reasonably easy fix, but it’s just a bit more involved. But unfortunately I’ve read more than one Stack Overflow post that followed this exact line of thinking. If you thought that was a little too easy, well, you’re right.

You think:Ĭool, I can just set isAccessibilityElement to NO and move on. But how do I do that?Īfter a little Googling you find the isAccessibilityElement property. I should hide that from VoiceOver when it’s disabled. The button is disabled unless a user fills out a certain text field. Suddenly you notice a button in the corner.

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You know a little bit about how to use VoiceOver and you’re taking a quick look at your app to make sure it’s accessible. Maybe this scenario sounds familiar: You’re working on your iOS application, dabbling with Accessibility. Common Accessibility Element Pitfalls and How to Avoid Them