UITextView with NSAttributedString and custom attributes not working

Question

When using a UITextView I try to add a custom attribute to an attributed string. However, all custom keys are lost after assigning to a UITextView\'s attributedText. Like this:<

Answer 1

UITextView does not really display attributed strings. Apple has an internal class NSHTMLWriter which converts the set NSAttributedString into HTML data which is then displayed by the content UIWebDocumentView (which is essentially Webkit)

See my analysis here: http://www.cocoanetics.com/2012/12/uitextview-caught-with-trousers-down/