Poetry cannot be translated; and, therefore, it is the poets that preserve the languages.

Samuel Johnson

Because macros does not exists anymore in Swift, so we have to translate them into Swift functions func.

Swift brings the power of generics, so this extension use it pretty intensively. The major benefit is that tweaks are now checked at compile time.

For instance, if you want to control the animation duration, you can do :

let duration: Double = tweak("Advanced", "Animation", "Duration", Double(1.0), Double(0.3), Double(8.0))

NB: the let duration: Double is to prove to you that the tweak(_:_:_:_:_:_:) function is returining the right type, which is Double in this case.

Three simple steps :

• of course, include the original FBTweaks project with one of the two options they provide
• include the FBTweaks+Macros.swift
• add the content of the ObjC-Briding-Header.h file to your own Objective-C Briding Header file.

And you're good to go.

• tweaks are not statically stored during compile time in the __FBTweak section of the mach-o, as they are in the objective-c macros implementation. If you figure out a way to do that with the Swift compiler, do not hesitate to make a PR.

Pierre Dulac
@dulaccc

Tweaks-swift is available under the MIT license. See the LICENSE file for more info.