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Input errors on iOS

Users should be notified when they make input errors. Show a clear error message when data has been entered incorrectly. Furthermore, provide suggestions that help users to fix the error. It is important that error messages are also posted to users of assistive technologies.

On iOS, we recommend using an UILabel to indicate an error. The error message should also be posted to assistive technologies by using an accessibility announcement.

You could also use a third party library to displaying instructions. Unfortunately, accessibility is often not considered in the implementations.

errorLabel.isHidden = false
errorLabel.text = "Invalid date, must be in the form DD/MM/YYYY, for example, 01/01/2000"

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