ios - 无法在 iPad iOS5 中为通用应用程序保留横向（iOS6 可以）

Question

我正在使用 xcode4.5.1 中的 Master-detail 模板来创建一个通用应用程序。为了在 iPad 中保持横向，我有以下设置。它适用于 iOS6，但在 iOS5 中始终保持纵向。我该如何解决这个问题？（项目链接：https ://www.dropbox.com/s/7wm9l8kxhan6kp1/itstest.zip ）</p>

1. 列表

   <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. 甚至在 Appdelegate.m 中添加以下内容

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

谢谢！

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);
}