The purpose of this course is to provide iOS developers with a practical way to “think different”, and open another door so they can see the whole picture.This course offers a free conprehensive book and serves as a digest and guide of it.

The course consists of 4 parts, i.e. concepts, tools, theories and practices. The course follows an "abstraction, concrete, abstraction, concrete" structure, starting from basic concepts like iOS filesystem hierarchy and iOS file types that Apple didn't expose to App developers but iOS researchers should know, then goes through the most commonly used tools like class-dump, Theos, Cycript, Reveal, IDA and LLDB to introduce what to do in iOS reverse engineering. After that, iOS reverse engineering theories based on Objective-C and ARM assembly are explained in a methodological way, pointing out the core of the book. Last but not least, several originally elaborated practices are there to cover all previous contents of the course and give you the most intuitive perception of iOS reverse engineering.