CoreText crashes when run in multiple threads

Question

I have a very weird problem with core text, which sometimes randomly and sometimes reproducibly crashes my application. I use it to lay out and render a couple of pages. I do th

Answer 1

CoreText takes a while to initialize the font lookup table when you use it for the first time. I imagine you might be able to get rid of your problem by first triggering a loading of this table before going to multiple threads.

See http://www.cocoanetics.com/2011/04/coretext-loading-performance/ for a method how.