在iOS 8上，旋转时更改XIB无法正常工作

我的应用程序在iOS 8上运行时遇到问题。当我在纵向模式下启动应用程序时，它工作正常，但当在横向模式下启动时，我有这样的事情

我使用2XIB，并根据此代码在旋转时对其进行更改。它在iOS 7上运行良好，但在iOS 8上无法正常运行

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation  duration:(NSTimeInterval)duration
{
    if( UIInterfaceOrientationIsLandscape(toInterfaceOrientation) )
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@-landscape", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
    else
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
}

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:YES];

    if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation))
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@-landscape", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];

    } else if (UIInterfaceOrientationIsPortrait(self.interfaceOrientation)){
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
}

-willRotateToInterfaceOrientation:duration:在iOS 8中不推荐使用。改为使用-viewwillTransitionOnSize:和TransitionCoordinator:。如果需要获得方向，请使用[[UIApplication sharedApplication]statusBarOrientation]