启动应用并保持横向模式

Question

如何在横向模式下启动应用程序，并保持屏幕旋转？

Answer 1

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

Answer 2

实施视图控制器的shouldAutorotateToInterfaceOrientation:方法和return UIInterfaceOrientationIsLandscape(orientation);

同时将Info.plist键UIInterfaceOrientation和UISupportedInterfaceOrientations设置为UIInterfaceOrientationLandscapeLeft和UIInterfaceOrientationLandscapeRight。 UIInterfaceOrientation将采用单个值，因此请指定其中一个并将其分配给UISupportedInterfaceOrientations。