Ask HN: Best approach to write an Objective-C tutorial

Hello,

I plan to write a beginner Objective-C tutorial with a friend. I'm interested in your opinion about best approach for this.

I have two possible directions in mind:

* Pure Objective-C tutorial (I will assume the reader knows C), the reader should be able to do the exercises and test his ideas from a Terminal. In principle this tutorial can be followed on a Mac with Xcode, on a Linux or Windows computer with GNUstep. The tutorial will present simple exercises that will guide the reader through all aspects of modern Objective-C.

*Objective-C on iOS, this could be a more applied tutorial than my first idea. From start I will assume that every exercise will be tested on an iPad or iPhone. As before I will suppose that the reader knows C, I will assume zero Objective-C experience.

Thanks and I look forward to your observations.