首先在这个viewContoller里面设定只支持横向
//iOS 7 above
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeLeft;
}

- (NSUInteger)supportedInterfaceOrientations
{
  return UIInterfaceOrientationMaskLandscape;
}

iOS特定的一个controller横屏--iOS7