Althought Swift is hot right now and I learned Swift in the beginning when I start to learn coding. However, after I start to work as an iOS engineer, most of the projects are still written in Objective-C and they need to be maintained. So Objective-C is equally important for people like me and I want to write Objective-C code as many as possible.
I have seen a lot of great works and inspired by allenwong's 30DaysofSwift, so I would like to do a similiar project called 30DaysObjc.