Make app start and remain in landscape mode

问题

How can I start my app in landscape mode, and keep the screen rotation that way?

回答1:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
 return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || 
   interfaceOrientation == UIInterfaceOrientationLandscapeRight);
} 

回答2:

Implement the view controller's shouldAutorotateToInterfaceOrientation: method and return UIInterfaceOrientationIsLandscape(orientation);

Also set the Info.plist keys UIInterfaceOrientation and UISupportedInterfaceOrientations to UIInterfaceOrientationLandscapeLeft and UIInterfaceOrientationLandscapeRight. UIInterfaceOrientation will take a single value so assign one of them and assign both of them to UISupportedInterfaceOrientations.

来源：https://stackoverflow.com/questions/6353076/make-app-start-and-remain-in-landscape-mode