How can I switch from xib file to viewcontroller? - ios

Question

When the image in the view I created with xib is clicked, I want it to go to the view controller in the storyboard. I tried segue-present and pushviewcontroller() but how can I do it?
Also, the delegate nil in the imageClicked() function is coming.delagate should not be nil
This is xib file:
xib view
import UIKit
protocol BookDetailVideoViewDelegate : class {
func videoOpen(value: Bool)
}
class BookDetailVideoViewController: UIViewController{
weak var delegate : BookDetailVideoViewDelegate?
var book : Book?
var videoUrl = ""
var url: URL?
var index = 0
#IBOutlet weak var bookImageView: UIImageView!
//var book = self.book
#IBOutlet weak var bookImageViewWidthConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
if #available(iOS 11.0, *) {
self.extendedLayoutIncludesOpaqueBars = true
} else {
self.edgesForExtendedLayout = []
}
self.navigationController?.navigationBar.isTranslucent = false
//self.bookImageViewWidthConstraint.constant = UIScreen.main.bounds.width * 0.35
self.view.layoutIfNeeded()
if let url = self.url {
self.bookImageView.kf.setImage(with: url)
}
self.bookImageView.layer.cornerRadius = 10
bookImageView.isUserInteractionEnabled = true
let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageClicked))
bookImageView.addGestureRecognizer(gestureRecognizer)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
}
deinit {
self.url = nil
}
#objc func imageClicked(){
print(delegate as Any)
self.delegate?.videoOpen(value: true)
}
func initializeView(url: URL, index: Int , book: Book) {
self.index = index
self.url = url
self.book = book
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
}
}
The view controller is like this:
import UIKit
import YoutubePlayer_in_WKWebView
class YoutubeVideoViewController: UIViewController , BookDetailVideoViewDelegate, WKYTPlayerViewDelegate {
let myDelegate : BookDetailVideoViewController = BookDetailVideoViewController()
var boolvalue = true
var book : Book?
#IBOutlet weak var playerView: WKYTPlayerView!
override func viewDidLoad() {
super.viewDidLoad()
playerView.delegate = self
myDelegate.delegate = self
let mediakey = book!.mediaKey as String?
playerView.load(withVideoId: mediakey!)
}
func videoOpen(value : Bool) {
guard let ViewC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "YoutubeVideoViewController") as? YoutubeVideoViewController else{return}
ViewC.book = book
ViewC.boolvalue = value
self.present(ViewC, animated: true)
}
}