Second is to add Tab bar to this gallery. Can you guide me how to do this? Thanks a ton.

Kind regards, Lars

Thank you very much indeed for your excellent sample code and all the great examples which are extremely useful for iPhone development beginners like myself.

As I can see from your sample code, the orientation determination always starts when the first view is already added to the window as a subview. Is there a way of starting earlier? Actually I do not like Apple’s approach to start all applications in Portrait Orientation first and only then switch to Landscape Orientation if necessary.

If I hold my iPhone already in Landscape Orientation and start an app or safari (yes, I know, I shouldn’t), it will show Portrait Orientation first and switch directly to Landscape Orientation afterwards. I would like to prevent this animated orientation switch entirely and start right away with the “correct” orientation of the app accordingly to the device’s physical orientation (yes, I saw your discussion on flipping the whole app’s or just the view orientation of the image view).

This is a minor issue with the iPhone since the UI of the springboard is not (yet) available in landscape orientation anyway, but rather soon it will be more important, because – even Apple admits – one cannot predict the “user preferred orientation” anymore when it comes to the iPad.

So, can I already start with this accelerometer determination at the point of “applicationDidFinishLaunching”? I would like to determine the necessary view orientation first (accordingly to the physical orientation of the device) and only then add the respective (portrait or landscape) view controller and view as a subview to the window.

How would I add a view controller dynamically then (sorry, I am still a beginner)?

Since I do not love too much this animated rotation of the views, I would rather like to use something which is shown in Apple’s AlternateViews example and to have this quick and neat cross-dissolve effect instead.

Thanks again for your helpful blog and those great insights.

Kind regards from Berlin, Lars

Can you please help me .

Thank you
Shawn

Very true, I’ve updated the post. Thanks!

Awesome code! That does give access to the shouldAutorotateToInterfaceOrientation event! Thanks a lot. I’ll update my other post later with your solution.

-(void) viewWillAppear: (BOOL) animated{

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

[[NSNotificationCenter defaultCenter] addObserver: self
selector: @selector(receivedRotate:)
name: UIDeviceOrientationDidChangeNotification
object: nil];
…
}

-(void) receivedRotate: (NSNotification*) notification
{
UIDeviceOrientation interfaceOrientation = [[UIDevice currentDevice] orientation];
if(interfaceOrientation == UIInterfaceOrientationLandscapeLeft)
{
…
}
}

-(void) viewWillDisappear: (BOOL) animated{
[[NSNotificationCenter defaultCenter] removeObserver: self];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
…
}