button load from xib via loadNibNamed() never called - ios

Question

Another problem arrived me. I have a view covering my hole screen. In it a webView for showing a youTube video and a button for closing. The view is load via loadNibNamed() and no matter what I'm doing, my IBAction never called by pressing that button.
I tried to make an IBAction via storyboard, also via addTarget to a buttonoutlet. Both never called. My button is reachable when I click it, it show the default touchanimation. Also printing the button outlet in viewDidLoad() says <UIButton: 0x17d25430; frame = (15 8; 39 30); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x17d25ae0>> so it is not nil.
My Layout looks like the following.
MainScreen: UIViewController, UITableViewDelegate, UITableViewDataSource, UIWebViewDelegate{}
In one of mainScreens tableView is a customCell named videoViewCell implemented with:
let cell = NSBundle.mainBundle().loadNibNamed("VideoViewCell", owner: self, options: nil)!.first as! VideoViewCell
videoViewCell: UITableViewCell , UITableViewDelegate, UITableViewDataSource {} has:
weak var delegate: ActivityDetailVideoCellDelegate?
...
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
delegate?.selectedCellAtIndex(indexPath.row)
}
...
protocol ActivityDetailVideoCellDelegate: class {
func selectedCellAtIndex(index: Int)
}
My mainScreen class has:
extension MainScreen: ActivityDetailVideoCellDelegate {
func selectedCellAtIndex(index: Int) {
let youtubeLink: String = "http://www.youtube.com/embed/\(selectedVideo)"
let youtubePopup = YouTubePopUpController()
youtubePopup.view.frame = self.view.bounds
youtubePopup.view.alpha = 0
youtubePopup.view.transform = CGAffineTransformMakeScale(1.3, 1.3)
let code: String = "<iframe width=\(youtubePopup.webView.bounds.width) height=\(youtubePopup.webView.bounds.height) src=\(youtubeLink) frameborder=0 allowfullscreen></iframe> <style>body { margin: 0; padding: 0; }</style>"
youtubePopup.webView.loadHTMLString(code, baseURL: nil)
self.view.addSubview(youtubePopup.view)
UIView.animateWithDuration(0.25, animations: { () -> Void in
youtubePopup.view.alpha = 1
youtubePopup.view.transform = CGAffineTransformMakeScale(1, 1)
})
}
}
YouTubePopUpController: UIViewController:
#IBOutlet weak var backgroundView: UIView!
#IBOutlet weak var webView: UIWebView!
#IBOutlet weak var closeButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
print(closeButton)
closeButton.addTarget(self, action: #selector(self.closeButtonClicked(_:)), forControlEvents: .TouchUpInside)
}
#IBAction func closeButtonClicked(sender: AnyObject) {
print("close clicked")
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.transform = CGAffineTransformMakeScale(1.3, 1.3)
self.view.alpha = 0
}) { (finished) -> Void in
self.view.removeFromSuperview()
}
}
my xib:

Answer 1

Finally solved my Problem by writing the #IBAction func closeButtonClicked(sender: AnyObject) {} inside my MainScreenViewController an adding Target inside func selectedCellAtIndex(index: Int) {} to call my youtubePopUp inside closeButtonClicked I made it global:
#IBAction func closeButtonClicked(sender: AnyObject) {
print("close clicked")
youtubePopup!.webView.loadHTMLString("about:blank", baseURL: nil)
youtubePopup!.webView.mediaPlaybackRequiresUserAction = false
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.youtubePopup!.view.transform = CGAffineTransformMakeScale(1.3, 1.3)
self.youtubePopup!.view.alpha = 0
}) { (finished) -> Void in
self.youtubePopup!.view.removeFromSuperview()
}
}