Swift function swizzling / runtime

Question

Before Swift, in Objective-C I would swizzle or hook methods in a class using <objc/runtime.h>.

If anyone has any info on the topic of modifying Swift's runtime and hooking functions like CydiaSubstrate and other libraries that helped in this area, please inform me.

Answer 1

I wouldn't do it that way, I think closures provide the answers (as they give you a chance to intercept, evaluate, and forward the invocation of the function, additionally it will be easy to extend when and if we have reflection.

http://www.swift-studies.com/blog/2014/7/13/method-swizzling-in-swift