第一個：  

// 狀態欄動畫持續時間  
CGFloat duration = [UIApplication sharedApplication].statusBarOrientationAnimationDuration;  
[UIView animateWithDuration:duration animations:^{  
    // 修改狀態欄的方向及view的方向進而強制旋轉屏幕  
    [[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);  
}];  

 

    第二個： 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];  
        }