CTFramesetterCreateWithAttributedString EXC_BAD_ACCESS

Question

I use core text to draw sth and it receives EXC_BAD_ACCESS problem in case of

CTFramesetterCreateWithAttributedString((CFAttributedStringRef)immutableContent);

I also print immutableContent which is a NSAttributedString :

The problem here is when this happens, I don't know how to debug it. I guess there is sth wrong with the NSAttributedString , but I don't know how to fix it. Besides, the method used to create the NSAttributedString works in another project. So why I am confused~~

thanks!

Answer 1

my code and works fine

NSMutableAttributedString* attrStrWithLinks = [self.attributedText mutableCopy];
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)attrStrWithLinks);

self.attributedText - NSAttributedString

Answer 2

In our case, what happens is that another thread is changing the attributes on the string during the framesetting. One approach is SAKrisT's, which is to work on a copy. Another is to serialize access to the string CTFramesetterCreateWithAttributedString call.