현재 스크린 사이즈 와 회전 상태 파악

CGRect screenBounds = [[UIScreen mainScreen] bounds];

   // CGFloat screenScale = [[UIScreen mainScreen] scale];

    CGSize screenSize ;

    bool portraitYN;

    if (UIDeviceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation])) {

           screenSize = CGSizeMake(screenBounds.size.width, screenBounds.size.height);

        portraitYN = YES;

        //other codes

    }

    

    else {

         screenSize = CGSizeMake(screenBounds.size.height, screenBounds.size.width);

                portraitYN = NO;

        //other codes

    }