Two viewControllers one is aboutViewController and second one is customViewController.Added customViewController in aboutViewController as an subView on bottom position now I want when user swipe up the whole controller swipe up and show all the content of viewController and swipe down to get the same position through animation.

AboutViewController:

class AboutViewController: UIViewController {
    @IBOutlet weak var customsController:CustomViewController!
    override func viewDidLoad() {
        super.viewDidLoad()
        
    }
    
    override func viewDidAppear(_ animated: Bool) {
        customController()
    }
    
    func customController(){
        guard let vc = self.storyboard?.instantiateViewController(withIdentifier: String(describing: CustomViewController.self)) as? CustomViewController else {return}
        let screnSize = UIScreen.main.bounds
        let frame:CGRect = .init(x: 0, y: screnSize.height - 300, width: screnSize.width, height: 300)
        vc.view.frame = frame
        self.view.addSubview(vc.view)
    }

}

Here is the example I want to achieve like this one see the pics below I want this functionality