启动应用程序并保持横向模式

如何在横向模式下启动我的应用程序，并保持屏幕旋转？

Answer 1

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

Answer 2

实现视图控制器的shouldAutorotateToInterfaceOrientation:方法并return UIInterfaceOrientationIsLandscape(orientation);

UISupportedInterfaceOrientations Info.plist键UISupportedInterfaceOrientations和UISupportedInterfaceOrientations设置为UISupportedInterfaceOrientations和UISupportedInterfaceOrientations 。 UIInterfaceOrientation将采用单个值，因此分配其中一个并将它们分配给UISupportedInterfaceOrientations 。