Cuculus

A library for Swift Function Hooking. Use at your own risk.

let cat = Cat()
XCTAssertEqual(cat.bark(), "nyan")
let injector = try! SwiftFunctionInjector("Cat.bark")
injector.inject("Cat._bark")
XCTAssertEqual(cat.bark(), "bowwow")

Support

\	global	valuetype	class	protocol extension
static func	○	○	○	○
static computed property	○	○	○	○
static stored property	×	×	×	-
static subscript	-	○	○	○
instance func	-	○	○	○
instance computed property	-	○	○	○
instance stored property	-	※1	○	-
instance subscript	-	○	○	○

※ Inlinable function is possible to not work.
※1 It's possible to hook if access from existential.

environment
iOS	×
iPhone Simulator	○
macOS	○

swift
5.1	○
5.0	○
4.2	○