我有一个非常简单的UIViewController，我正在尝试弄清楚如何使用willRotateToInterfaceOrientation。我的UIViewController有一个非常简单的viewDidLoad方法:-(void)viewDidLoad{[superviewDidLoad];theBar=[[UINavigationBaralloc]initWithFrame:CGRectMake(0.0f,0.0f,320.0f,48.0f)];theBar.tintColor=[UIColororangeColor];UINavigationItem*item=[[UINav