Take the tour ×  I have iPhone app and I converted it in xcode4
to universal app, and it worked fine, but after that I deleted
MainWindow-iPad and return to iPhone app only. Now I need to
make my app universal again, I clicked in Xcode4 "Devices-
Universal", but XCode don't create MainWindow-iPad and don't ask
me "Transition to universal target" so when I'm building and
running in iPad simulator app crashes. How can I fix this? Thank
you.  share|improve this question add comment  1 Answer  up vote
0 down vote accepted  Create your own mainwindow-ipad nib file
and set it as main nib file for the iPad platform in your
info.plist  share|improve this answer I did that, app loads in
iPad simulator with white screen, without any controls –  Tunyk
Pavel Apr 26 '11 at 9:34 Solution: 1.I manually added
MainWindow-iPad.xib, changed File's Owner class to
UIApplication. 2.Add object to MainWindow-iPad.xib using IB and
set class to YourAppDelegate. 3.Connect using IBOutlet File's
Owner and YourAppDelegate "delegate". 4.Set