iOS两个强制旋转屏幕的方法

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];
        }