objective c - Swizzling have to be on main thread?

Question

I am succesfully swizziling imageNamed: method when on the main thread.

Here is my code, it is js-ctypes: https://gist.github.com/Noitidart/e8105a5f702dc9e6a4b8

I seem to be crashing when doing it from another thread. I'm not sure if it's a typo somwhere, I'm still digging but can't seem to find any mistakes. So I was wondering if swizziling with method_setImplementation is not thread safe?

Does the same thread safety apply to swizziling with method_exchangeImplementations?

Answer 1

I think you have an issue in your code but I can recommend you JRSwizzle library https://github.com/rentzsch/jrswizzle and a demo how to use: https://github.com/kostiakoval/JRSwizzleExample