Iphone SDK question (newbie)

I am new and just got my first Mac computer..
I am porting an application over which is using C and C++ to the iphone
The main problem will be that 1) it uses pthreads, 2) and sockets (winsock to be exact)
It looks like there are some socket available.
Also I had a look at the objective C and it does not seem easy to learn, but eventually I will need to use some for UI.
Would it be worth while to focus on the C++ efforts and target the program on OS X first then go to the iphone? .. and to get myself familiar to Xcode.. I am only used to visual studio.
Thanks in advance.

Hi Cal, and welcome to the Dev Forum!
Both OS/X and iPhone are built on a "Darwin" layer that includes all of BSD and more. The easiest way to access those docs is to bring up the Terminal app (man sockets, man pthread, etc.).
If you have some C, the learning curve for Obj-C is only steep for the first few days. You probably won't need a book devoted to Obj-C, but you should definitely have either Hillegass or Mark & LaMarche, preferably both, to ease you into Obj-C, Cocoa, and the iPhone.
I think Obj-C is a little harder if you're heavily into C++, or--worse yet--C# since you may need to unlearn a few habits, but not to worry. You'll love Obj-C and never want to see another Windows platform after the first few weeks.
If your target is iPhone, I'd go straight there, except for the times when the best books on a subject (such as animation) are written for OS/X. In fact all the Hillegass projects are for OS/X, but some of the Cocoa is explained better there than anyplace else.
But I would not recommend starting to port your app to iPhone tomorrow. Instead take the time to do some of the projects in Mark & LaMarche, then play with some of the sample apps at the Dev Center. By then you'll pretty much know what your code's interface to Cocoa will look like.
Hope that helps!
\- Ray

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Pro, for my iPhone. I was looking into
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Build helloworldxc of project helloworldxc with configuration Debug
ProcessPCH /var/folders/P-/P-zMg0EzHree36VYyqKEvU+TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/helloworldxcPrefix-gylsydenhucpkgfnujlgvzvhfhzd/helloworldxcPrefix.pch.gch helloworldxc_Prefix.pch normal i386 objective-c com.apple.compilers.gcc.4_2
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