Tracing Objective-C method calls
Linux has this great tool called strace, on OSX there’s a tool called dtruss - based on dtrace. Dtruss is great in functionality, it gives pretty much everything you need. It is just not as nice to use as strace. However, on Linux there is also ltrace for library tracing. That is arguably more useful because you can see much more granular application activity. Unfortunately, there isn’t such a tool on OSX. So, I decided to make one - albeit a simpler version for now. I called it objc_trace.
Building libraries for iOS
In this blog we talk about how to build a library in a simple way. This is designed for those who only care about the quickest and easiest way to build a command line program or a dylib for a jailbroken iOS platform. So, it is not an exhaustive manual of all the possibilities but rather a quick reference guide to get you started.