Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.
You could post your project in the Jobs section of the forum. As you can see from posts here, there are a lot of developers here who do freelance work and who are open and honest about their skills. If nothing else, I'm sure you can get some general thoughts and pointers for the detailed specs you post. In any case, it's a decision not to be made in haste. Choosing the wrong one could cost you time and money. Be sure to have a contract for the work which details what you expect done, milestone payments, quality of end product... State clearly you want original work and design and that you want to be notified and consulted with whenever third party code or graphics are to be used, and decide if you want to allow it, given quality and licenses for such. Internet is a good place to learn but there are a lot of copy-pasters out there. These are just some of the things off the top of my head. It might be good to spend a day or two researching the subject of outsourcing and read up on thoughts and experiences of others to get a tip or two.
I think when you first close the project window (red button, upper left corner) and then quit Xcode (Cmd+Q), it wont open the project on next launch. Aside from that, I'm note sure if there's a specific setting, but I see how it could be useful.
Judging by the viewWillAppear I'm guessing this is in your login view controller, which you show from the app delegate. Don't do that. Instead, move all that code to the didFinishLaunching method in the app delegate (including the setRoot call), and after it, alloc/init the login view controller (if needed (no credentials stored)) and show it using presentViewController:animated:completion:. Then, when login is successful, just call dismissViewControllerAnimated and you'll be on your main UI.
That's not going to work on iOS. Nothing that you mentioned will work. Each app has to be installed and uninstalled separately, each will be present on the home screen and each could be opened directly.
Your best approach is to have a good architecture designed and documented and to use a revision control system like SVN so you can have different people working on different parts of the system. To be honest, that's what should have been done in the first place.