How to move viewcontroller?

[aboutyu]

Hi, I have a question. I have made collectionview to xib, but I can't move parent viewcontroller (viewcontroller is navigationcontroller)

It is calling to "move function" from xib. ("move function" is written to viewcontroller) but self.navigationController is returned nil.

How to make it? Move function is here.

func moveDetailView(str: String) {

    let sb = UIStoryboard(name: "Main", bundle: nil)
    if let uvc = sb.instantiateViewController(withIdentifier: "ProductDetailViewController") as? ProductDetailViewController {

        uvc.linkUrl = str

        //var rt =
        //var rootViewController = self.window!.rootViewController as! UINavigationController

        //let nv = UINavigationController()

        //nv.pushViewController(uvc, animated: true)

        self.navigationController?.pushViewController(uvc, animated: true)

        print("success \(UINavigationController())")
    }

[jjpatel1996]

collectionview which you using is child view of pagMenu right?