第一个：

    // 状态栏动画持续时间

    CGFloat duration = [UIApplication sharedApplication].statusBarOrientationAnimationDuration;

    [UIView animateWithDuration:duration animations:^{

        // 修改状态栏的方向及view的方向进而强制旋转屏幕

        [[UIApplication sharedApplication] setStatusBarOrientation:_bottomView.landscapeModel ? UIInterfaceOrientationLandscapeRight : UIInterfaceOrientationPortrait];

        self.navigationController.view.transform = _bottomView.landscapeModel ? CGAffineTransformMakeRotation(M_PI_2) : CGAffineTransformIdentity;

        self.navigationController.view.bounds = CGRectMake(self.navigationController.view.bounds.origin.x, self.navigationController.view.bounds.origin.y, self.view.frame.size.height, self.view.frame.size.width);

    }];

第二个：

非arc：

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {

  [[UIDevice currentDevice] performSelector:@selector(setOrientation:)

  withObject:(id)UIInterfaceOrientationLandscapeRight];

  }

arc下：

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {

            SEL selector = NSSelectorFromString(@"setOrientation:");

            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];

            [invocation setSelector:selector];

            [invocation setTarget:[UIDevice currentDevice]];

            int val = UIInterfaceOrientationLandscapeRight;

            [invocation setArgument:&val atIndex:2];

            [invocation invoke];

        }