iOS CGContextDrawPDFPage内存不是线程安全的

Question

When i draw a PDF i saw from instruments that if the CGContextDrawPDFPage method is not called from main thread, creates a leak in memory.

Someone has encountered the same problem?

Any help is appreciated.

Answer 1

It's been a while, but I recall that the PDF functions involved a fair amount of lazy instantiation or caching. Is Instruments showing a true leak, or just allocations that don't go away?

I remember getting concerned about memory bloat, until I realized it went away when I released the higher-level objects (CGPDFDocumentRef, I think).