Why do Xcode templates have #imports that duplicate Prefix.pch?

Question

While learning iPhone programming, every Xcode template I\'ve seen includes an AppName-Prefix.pch file with the following contents:

#ifdef __OBJC__
    #impo         


        

Answer 1

Why have both?

Better safe than sorry. Precompiled headers can be disabled, and since #import won't import anything twice, the overhead is negligible.