iOS--解决屏幕旋转后, presentController

//开始的方向
// 解决旋转屏幕后页面倒置问题
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    UIViewController *currentVc = [self getCurrentVC];
    if(currentVc.presentingViewController.preferredInterfaceOrientationForPresentation == UIDeviceOrientationLandscapeLeft || currentVc.presentingViewController.preferredInterfaceOrientationForPresentation == UIDeviceOrientationLandscapeRight){
        return currentVc.presentingViewController.preferredInterfaceOrientationForPresentation;
    }else{
        if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) {
            self.interfaceOrientation = UIInterfaceOrientationLandscapeLeft;
            return UIInterfaceOrientationLandscapeLeft;
        } else if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft) {
            self.interfaceOrientation = UIInterfaceOrientationLandscapeRight;
            return UIInterfaceOrientationLandscapeRight;
        }
        return self.interfaceOrientation;
    }
}