[SWIFT]비디오 비율 계산

class VideoLauncher: NSObject {
    
    func showVideoPlayer() {
        print("Showing video player animation....")
        
        if let keyWindow = UIApplication.shared.keyWindow {
            let view = UIView(frame: keyWindow.frame)
            view.backgroundColor = UIColor.white
            
            view.frame = CGRect(x: keyWindow.frame.width - 10, y: keyWindow.frame.height - 10, width: 10, height: 10)
            
            //16 x 9 is the aspect ratio of all HD videos
            let height = keyWindow.frame.width * 9 / 16
            let videoPlayerFrame = CGRect(x: 0, y: 0, width: keyWindow.frame.width, height: height)
            let videoPlayerView = VideoPlayerView(frame: videoPlayerFrame)
            view.addSubview(videoPlayerView)
            
            keyWindow.addSubview(view)
            
            UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
                view.frame = keyWindow.frame
            }) { (_) in
                UIApplication.shared.setStatusBarHidden(true, with: .fade)
            }
        }
    }
}

// 축소 확대시 비율 계산
let responsiveHeight = view.frame.width * 0.5625 // (1280, 720) 사이즈 기준