简单解决横竖屏

-(void)viewWillAppear:(BOOL)animated{

    [self didReceiveMemoryWarning];

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.view=[[UIView alloc]initWithFrame:[UIScreen mainScreen].bounds];

    self.view.backgroundColor=[UIColor redColor];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(detectOrientation) name:@"UIDeviceOrientationDidChangeNotification" object:nil];

    // Do any additional setup after loading the view.

}

-(void)detectOrientation

{

    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft||[[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) {

        NSLog(@"横屏");

    }else

    {

        NSLog(@"竖屏");

    }

}