如何：仅在 iPhone 上自动旋转 iPad 和纵向？

Question

Hi I have just started iPhone programming. I created a universal app for iPad and iPhone in Xcode 3.2 and evrerything is working fine. But now I want to implement following feature in that app:

It should support autorotation on iPad and be portrait only on iPhone.

I have no idea how to do that.

I have an AppDelegate_iPad delegate file, an AppDelegate_iPhone delegate file, and a viewcontroller under Shared tab and is share by both of these delegates.

Any ideas how can I implement that feature. any help would be appreciated.

Thanks Vik

Answer 1

In the view controller(s) for the view(s) where you want to implement this rotation behavior, do the check inside the shouldAutorotateToInterfaceOrientation , like this:

- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation) interfaceOrientation {     
    UIDevice* thisDevice = [UIDevice currentDevice];
    if (thisDevice.userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {
        return true;
    }
    else
    {
        return interfaceOrientation == UIDeviceOrientationPortrait;
    }
}

Answer 2

Apps running iOS 6+ will also want to implement ViewController's:

- (NSInteger)supportedInterfaceOrientations

and/or AppDelegate's:

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window

Eg,

- (NSInteger)supportedInterfaceOrientations
{
    if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
        return UIInterfaceOrientationMaskAll;
    }
    return UIInterfaceOrientationMaskPortrait;
}