Subview to TabBarController is blocking tab bar items in iOS - ios

Question

I'm working on something like the draggable video player in youtube app. I've been able to make the swipe down work and I'm adding the video player view as a subview to the Tab bar controller which is the root view of my application. The issue is when I swipe down to minimise the video, I'm not able to select two tab bar items underneath the video player. How do I solve this?
In the image, the Live and Me tabs are not selectable unless I remove the video player from the screen.
My view hierarchy is UITabBarController > UINavigationController > UIViewController so i subclassed UINavigationController:
class CFNavigationController: UINavigationController, CFVideoPlayerControllerDelegate {
//MARK: Properties
lazy var videoPlayerViewController: CFVideoPlayerController = {
let pvc: CFVideoPlayerController = self.storyboard?.instantiateViewController(withIdentifier: "videoPlayer") as! CFVideoPlayerController
pvc.view.frame = CGRect.init(origin: self.hiddenOrigin, size: UIScreen.main.bounds.size)
pvc.delegate = self
return pvc
}()
let statusView: UIView = {
let st = UIView.init(frame: UIApplication.shared.statusBarFrame)
st.backgroundColor = UIColor.white
st.alpha = 0.15 // 0.15
return st
}()
let hiddenOrigin: CGPoint = {
let y = UIScreen.main.bounds.height - (UIScreen.main.bounds.width * 9 / 32) - 10
let x = -UIScreen.main.bounds.width
let coordinate = CGPoint.init(x: x, y: y)
return coordinate
}()
let minimizedOrigin: CGPoint = {
let x = UIScreen.main.bounds.width/2 - 10
let y = UIScreen.main.bounds.height - (UIScreen.main.bounds.width * 9 / 32) - 60
let coordinate = CGPoint.init(x: x, y: y)
return coordinate
}()
let fullScreenOrigin = CGPoint.init(x: 0, y: 0)
//Methods
func animatePlayView(toState: stateOfVC) {
switch toState {
case .fullScreen:
UIView.animate(withDuration: 0.3, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 5, options: UIViewAnimationOptions.beginFromCurrentState, animations: {
self.videoPlayerViewController.view.frame.origin = self.fullScreenOrigin
})
case .minimized:
UIView.animate(withDuration: 0.3, animations: {
self.videoPlayerViewController.view.frame.origin = self.minimizedOrigin
})
case .hidden:
UIView.animate(withDuration: 0.3, animations: {
self.videoPlayerViewController.view.frame.origin = self.hiddenOrigin
self.videoPlayerViewController.videoPlayerView.player?.replaceCurrentItem(with: nil)
})
}
}
func positionDuringSwipe(scaleFactor: CGFloat) -> CGPoint {
let width = UIScreen.main.bounds.width * 0.5 * scaleFactor
let height = width * 9 / 16
let x = (UIScreen.main.bounds.width - 10) * scaleFactor - width
let y = (UIScreen.main.bounds.height - 10 ) * scaleFactor - height
let coordinate = CGPoint.init(x: x, y: y)
return coordinate
}
//MARK: Delegate methods
func didMinimize() {
self.animatePlayView(toState: .minimized)
}
func didMaximize(){
self.animatePlayView(toState: .fullScreen)
}
func didEndedSwipe(toState: stateOfVC){
self.animatePlayView(toState: toState)
}
func swipeToMinimize(translation: CGFloat, toState: stateOfVC){
switch toState {
case .fullScreen:
self.videoPlayerViewController.view.frame.origin = self.positionDuringSwipe(scaleFactor: translation)
case .hidden:
// self.videoPlayerViewController.view.frame.origin.x = UIScreen.main.bounds.width/2 - abs(translation) - 10
self.videoPlayerViewController.removeFromParentViewController()
case .minimized:
self.videoPlayerViewController.view.frame.origin = self.positionDuringSwipe(scaleFactor: translation)
}
}
//MARK: ViewController lifecycle
override func viewDidLoad() {
super.viewDidLoad()
self.tabBarController?.view.addSubview(self.videoPlayerViewController.view)
self.tabBarController?.view.bringSubview(toFront: self.videoPlayerViewController.view)
}
override func viewDidAppear(_ animated: Bool) {
super.viewWillAppear(true)
}
// Give View Controllers the power of their own rotation
open override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return visibleViewController?.supportedInterfaceOrientations ?? super.supportedInterfaceOrientations
}
open override var shouldAutorotate: Bool {
return visibleViewController?.shouldAutorotate ?? super.shouldAutorotate
} }
Here is how I add it to as subview:
self.tabBarController?.view.addSubview(self.videoPlayerViewController.view)
self.tabBarController?.view.bringSubview(toFront: self.videoPlayerViewController.view)