I have a Cocoa app with an
NSTextView control which holds its text in an
NSAttributedString (actually I believe it's a
NSMutableAttributedString). I can easily set and modify different text attributes (such as font, underline, etc.) on different character ranges inside that string.
However, I want to set a part of the text as hidden (similar to the effect of the CSS attribute
display: none). When an external event occurs (say a button clicked), I want to unhide or hide that specific range of characters.
Is there anyway to do this with
Another possibility would be to use a custom attribute on the text you want to hide, and then write your own method in a category on
NSAttributedStringthat creates a new attributed string that excludes the text marked as hidden.
Caveat: I totally just wrote this off the top of my head, and it's not guaranteed to compile, work, light your hard drive on fire, not kick your dog, etc.
This would generate a string that's appropriate for drawing, but you would still need the original string for accessing any of the hidden text. Depending on the size of your strings, this could be a big memory overhead.