让应用程序启动并保持横向模式

Question

如何以横向模式启动我的应用，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:方法和return UIInterfaceOrientationIsLandscape(orientation);

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