Day 149

Keep media readable with Smart Invert

15 Oct 2022

Classic Invert reverses the colors of the display. But there's also Smart Invert. To support it, for avoiding images and media from being inverted, you just have to set accessibilityIgnoresInvertColors to true, for these elements. A quick win!

Three examples of the Books app showing the Steve Jobs book by Walter Isaacson. The first one is the default mode. The second one shows all the colors inverted with Classic Invert. The third one shows the colors inverted for everything but the image for the book cover. Some code shows how you just need to set accessibilityIgnoresInvertColors to true for the book cover image.

Some of you have asked me how you can support what I do. This would really help, and would be hugely appreciated:

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You may also find interesting...

Two more examples on better accessibility labels for abbreviations. "4 days ago" is better than "4 D", with a RelativeDateTimeFormatter and a spellOut units style. "Monday" is better than "Mon", accessing the weekdaySymbols from a Calendar. Some useful links: Relative Date Time Formatter: https://developer.apple.com/documentation/foundation/relativedatetimeformatter Units Style: https://developer.apple.com/documentation/foundation/relativedatetimeformatter/unitsstyle-swift.enum/spellout Weekday symbols: https://developer.apple.com/documentation/foundation/calendar/weekdaysymbols

The Accessibility Inspector has a Notifications log that you can find in Window, in its top menu, and then Show Notifications. It shows accessibility-related notifications like layout changed, screen changed, or announcements... I learned about this feature from the Accessibility Inspector in this article by @basthomas. A very recommended read to learn all about the Verifying VoiceOver with the Accessibility Inspector. https://www.basbroek.nl/verifying-voiceover

There are a ton of customisation options in the accessibility settings in iOS. When doing things the Apple way, this options should, in most cases, just work for you. If not, you can find flags to check for all these options in UIAccessibility.


Content © Daniel Devesa Derksen-Staats on Accessibility up to 11! is licensed under CC BY 4.0. License details