Active UI navigation on the view under popover - ios

Question

I have an UI where the SCNView is in the background, and a WKWebView is in the foreground presented as a .popover. Views are controlled by separate view controllers. The WKWebView appears when user presses the bell button (see the attached screen). SCNView has standard camera control enabled.
Currently when the WKWebView popover appears the SCNView becomes unresponsive. Tap gesture outside the WKWebView closes it, other gestures are ignored, so user cannot control SCNView camera while WKWebView popover is visible. How can I make the SCNView responsive while WKWebVIew popover is present? How can I dismiss the WKWebView only when the bell button is pressed?
Code used below:
class MainVC: UIViewController, UIPopoverPresentationControllerDelegate {
#IBOutlet weak var scnView: SCNView!
#IBOutlet weak var bellBtn: UIButton!
var myWebViewVC: MyWebViewVC!
override func viewDidLoad() {
super.viewDidLoad()
let scene = SCNScene(named: "art.scnassets/DemoScene.scn")!
let scnView = sceneView
scnView!.scene = scene
scnView!.allowsCameraControl = true
}
#IBAction func onBellBtnPressed(_ sender: UIButton) {
myWebViewVC.modalPresentationStyle = .popover
myWebViewVC.popoverPresentationController?.delegate = self
present(myWebViewVC, animated: true, completion: nil)
myWebViewVC.popoverPresentationController?.sourceView = sender
myWebViewVC.popoverPresentationController?.sourceRect = sender.bounds
}
}
The MyWebViewVC takes care only of the size of the view. No additional custom modifications are implemented in the file.

Answer 1

Ok. So the solution is mainly connected with the popoverPresentationController parameter of the view controller. Here is documentation. To enable control on the view beneath the view presented as a .popover you need to inform it about the views which are going to be responsive when popover is present. The order of the passing is top to bottom. The code below and the passThrough array make it work.
class MainVC: UIViewController, UIPopoverPresentationControllerDelegate {
#IBOutlet weak var scnView: SCNView!
#IBOutlet weak var bellBtn: UIButton!
#IBOutlet weak var dotBtn: UIButton!
var myWebViewVC: MyWebViewVC!
override func viewDidLoad() {
super.viewDidLoad()
let scene = SCNScene(named: "art.scnassets/DemoScene.scn")!
scnView!.scene = scene
scnView!.allowsCameraControl = true
}
#IBAction func onBellBtnPressed(_ sender: UIButton) {
activeUiNavigationUnderPopover()
}
func activeUiNavigationUnderPopover () {
myWebViewVC.modalPresentationStyle = .popover
myWebViewVC.popoverPresentationController?.delegate = self
if let pop = myWebViewVC.popoverPresentationController {
var passthroughViews: [AnyObject]?
passthroughViews = [dotBtn, scnView]
pop.passthroughViews = NSMutableArray(array: passthroughViews!) as? [UIView]
pop.permittedArrowDirections = .any
pop.delegate = self
}
present(myWebViewVC, animated: true, completion: nil)
myWebViewVC.popoverPresentationController?.sourceView = sender
myWebViewVC.popoverPresentationController?.sourceRect = sender.bounds
}
}