Upgrade to iPhone 3.0 sdk and now simulator shows blank screen

Question

I have an iPhone app that uses an UITabBarController, which contains two UINavigationControllers, each of which in turn contains one or more TableViewControllers (actually,

Answer 1

I also have this issue, I coud solved doing the following:

In Interface builder:

• File's owner: is your application delegate
• window: is the application's delegate window outlet

In XCode: - If you are using 3.0 or upper, comment this code line in your application delegate:

// window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]

Answer 2

It appears you have to save the new interface before running. I have never developed for IPhone before and finally figured out why i was getting a white screen. Seems like it should save automatically before running but apparently it doesn't.