Could not keep landscape in iPad iOS5 for an universal application (iOS6 is OK)

Question

I'm using the Master-detail template in xcode4.5.1 to create an universal app. To keep landscape in iPad, I have following settings. It works in iOS6, but always keep portrait in iOS5. How can I solve the issue? ( project linkage: https://www.dropbox.com/s/7wm9l8kxhan6kp1/itstest.zip）

1. plist

   <key>UISupportedInterfaceOrientations~ipad</key>
   
   <array>
   <string>UIInterfaceOrientationLandscapeLeft</string>
   <string>UIInterfaceOrientationLandscapeRight</string>
   
   </array>
   
   <key>UISupportedInterfaceOrientations~iphone</key>
   
   <array>
   <string>UIInterfaceOrientationPortrait</string>
   <string>UIInterfaceOrientationPortraitUpsideDown</string>
   
   </array>
   

2. even add following in Appdelegate.m

   - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
       return UIInterfaceOrientationIsLandscape(interfaceOrientation);
   }
   

Thanks!

Answer 1

The method shouldAutorotateToInterfaceOrientation does not get called in your AppDelegate, only in your View Controllers (docs). Place the following code inside your view controllers (Although for your particular project I think it would be enough to place it only inside your MasterViewController):

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
        return UIInterfaceOrientationIsPortrait(interfaceOrientation);
    else
        return UIInterfaceOrientationIsLandscape(interfaceOrientation);
}