Hướng dẫn cài đặt XenseAR SDK cho Flutter iOS

dependencies:
  # Thêm hai package này vào danh sách
  flutter_embed_unity: ^1.4.0

flutter pub get

# XenseAR Library requires iOS 13+
platform :ios, '13.0'

flutter clean
flutter pub get

cd ios & pod install

import Flutter
import UIKit
 
@main
@objc class AppDelegate: FlutterAppDelegate {
 
    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
 
        // 1️⃣ Observe when new windows appear or become active
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(onWindowChange),
            name: UIWindow.didBecomeVisibleNotification,
            object: nil
        )
 
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(onWindowChange),
            name: UIWindow.didBecomeKeyNotification,
            object: nil
        )
 
        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }
 
    // 🔁 Called when any window becomes visible or key
    @objc func onWindowChange(_ notification: Notification) {
        print("🪟 Window change detected — re-checking WKWebView position.")
        // Delay slightly to let UIKit attach new layers
        DispatchQueue.main.async {
            self.moveWKWebViewToFrontmostWindow()
        }
    }
 
    func moveWKWebViewToFrontmostWindow() {
        // 1️⃣ Collect all visible windows from active scenes
        let allWindows = UIApplication.shared.connectedScenes
            .compactMap { ($0 as? UIWindowScene)?.windows }
            .flatMap { $0 }
            .filter { !$0.isHidden } // ignore hidden windows
 
        guard !allWindows.isEmpty else {
            print("❌ No visible windows found.")
            return
        }
 
        // 2️⃣ Locate the UnityView inside any visible window
        guard
            let unityView = allWindows
                .compactMap({ findSubview(in: $0, nameContains: "UnityView") })
                .first
        else {
            print("⚠️ UnityView not found in any window.")
            return
        }
 
        // 3️⃣ Locate the Vuplex fullscreen WKWebView
        guard
            let wkWebView = allWindows
                .compactMap({ findSubview(in: $0, nameContains: "VXFullScreenWKWebView") })
                .first
        else {
            print("⚠️ WKWebView not found in any window.")
            return
        }
 
        // 4️⃣ If WKWebView is already in the UnityView, no action needed
        if wkWebView.superview === unityView {
            print("✅ WKWebView is already inside the UnityView.")
            return
        }
 
        // 5️⃣ Move WKWebView from its current parent to UnityView
        let previousSuperview = wkWebView.superview
        wkWebView.removeFromSuperview()
        unityView.addSubview(wkWebView)
 
        // 6️⃣ Make WKWebView fill the UnityView entirely
        wkWebView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            wkWebView.leadingAnchor.constraint(equalTo: unityView.leadingAnchor),
            wkWebView.trailingAnchor.constraint(equalTo: unityView.trailingAnchor),
            wkWebView.topAnchor.constraint(equalTo: unityView.topAnchor),
            wkWebView.bottomAnchor.constraint(equalTo: unityView.bottomAnchor),
        ])
 
        // 7️⃣ Hide and clean up the old window if it’s different from UnityView's window
        if let prevWindow = previousSuperview?.window,
           prevWindow !== unityView.window {
            prevWindow.isHidden = true
        }
 
        // 8️⃣ Remove window observers (no longer needed)
        NotificationCenter.default.removeObserver(
            self,
            name: UIWindow.didBecomeKeyNotification,
            object: nil
        )
        NotificationCenter.default.removeObserver(
            self,
            name: UIWindow.didBecomeVisibleNotification,
            object: nil
        )
 
        print("✅ WKWebView moved from \(String(describing: previousSuperview)) to UnityView \(unityView).")
    }
 
    private func findSubview(in view: UIView, nameContains keyword: String) -> UIView? {
        if String(describing: type(of: view)).contains(keyword) {
            return view
        }
        for subview in view.subviews {
            if let match = findSubview(in: subview, nameContains: keyword) {
                return match
            }
        }
        return nil
    }
}