Reverse engineering from binary or ipa [closed]

Question

I lost the code of an app I wrote some years ago...the game structure was pretty cool and would be good to have it back...

So can I reverse a binary into...something? I mean at least class tree...

I've this

and the ipa (yes I saved it and not the code source, pretty smart eh?)

I saw this link but don't know how to use objc-helper-plugin-ida! Never used python before

otool gives:

Answer 1

Use IDA Pro 6.5 Demo (available for free from http://hex-rays.com) It supports ObjC by default

Answer 2

You can use Radare2, IDA Pro or Hopper. You'll need to reverse it and this might take more time than rewriting it. Also have a look at this post: Possibilities for reverse engineering an ipa file to its source

Answer 3

You can try SmartDec decompiler too. The IDA Pro plugin does support Mach-O.

Answer 4

To get the basic class structure back, you can use classdump.

It generates declarations for the classes, methods, categories and protocols. This is the same information provided by using ‘otool -ov’, but presented as normal Objective-C declarations, so it is much more compact and readable.