If I’m going to buy the 2nd edition should I learn Objective-C first?
Chapters 2 and 3 are entirely dedicated to Objective-C and Memory Management in Cocoa Touch.
If you already know C and are familiar with OOP, these chapters will be sufficient. (Objective-C is a simple extension to C.)
Otherwise, we’re getting close to printing our intro to programming text that covers C and Objective-C for the beginner.