how can i swizzle corefoundation framework methods?

Question

I followed this article for objective-c method swizzling. I'm successfully able to swizzle methods objective -c class methods. I also want to swizzle core foundation methods like CFHostCreateWithName(). Is it possible to swizzle core foundation methods?

Answer 1

Swizzling does not exist for C function, but there is an equivalent called patching. Unfortunately, it will not work on iOS.

In OS X, A code injection system like mach_override can be used to patch functions. It's not available for iOS. Even if you could get it to work, Apple would never approve it for the App Store.