Integration Unity as a library in native iOS app

Hi that would be super cool since I'm struggling with that too, I cannot get the touch to work with the subview, do you know if/when you'll be able to share your solution with us?
Thanks!

 

May I know how you able to achieve this?

 

Hi all,

I found this discussion which able to add the Unity player as subview. However the touch events in Unity player doesn't work. Just sharing here in case someone can get the events working.

https://stackoverflow.com/questions/59428747/embed-unity-inside-ios-in-own-viewcontroller

 

Hi all,

I've found the solution for using Unity player as a view in native IOS app

basically I just added this

Code (CSharp):

1. ufw?.appController()?.window?.windowLevel = UIWindow.Level(UIWindow.Level.normal.rawValue - CGFloat(globalUILevel))

in the initUnityWindow()

It works for now but may not be the practical way to do it, if anyone have a cleaner way to do it please share with us

Thanks

Reference:
https://stackoverflow.com/questions/59428747/embed-unity-inside-ios-in-own-viewcontroller
https://pub.dev/packages/flutter_unity_widget

Code (CSharp):

1. import Foundation
2. import UnityFramework
3.  
4. class UnityEmbeddedSwift: UIResponder, UIApplicationDelegate, UnityFrameworkListener {
5.  
6.     private struct UnityMessage {
7.         let objectName : String?
8.         let methodName : String?
9.         let messageBody : String?
10.     }
11.  
12.     private static var instance : UnityEmbeddedSwift!
13.     private var ufw : UnityFramework!
14.     private static var hostMainWindow : UIWindow! // Window to return to when exiting Unity window
15.     private static var launchOpts : [UIApplication.LaunchOptionsKey: Any]?
16.  
17.     private static var cachedMessages = [UnityMessage]()
18.  
19.     // MARK: - Static functions (that can be called from other scripts)
20.  
21.     static func getUnityRootViewController() -> UIViewController! {
22.         return instance.ufw.appController()?.rootViewController
23.     }
24.  
25.     static func getUnityView() -> UIView! {
26.         return instance.ufw.appController()?.rootViewController?.view
27.     }
28.  
29.     static func setHostMainWindow(_ hostMainWindow : UIWindow?) {
30.         UnityEmbeddedSwift.hostMainWindow = hostMainWindow
31.         let value = UIInterfaceOrientation.landscapeLeft.rawValue
32.         UIDevice.current.setValue(value, forKey: "orientation")
33.     }
34.  
35.     static func setLaunchinOptions(_ launchingOptions :  [UIApplication.LaunchOptionsKey: Any]?) {
36.         UnityEmbeddedSwift.launchOpts = launchingOptions
37.     }
38.  
39.     static func showUnity() {
40.         if(UnityEmbeddedSwift.instance == nil || UnityEmbeddedSwift.instance.unityIsInitialized() == false) {
41.             UnityEmbeddedSwift().initUnityWindow()
42.         }
43.         else {
44.             UnityEmbeddedSwift.instance.showUnityWindow()
45.         }
46.     }
47.  
48.     static func hideUnity() {
49.         UnityEmbeddedSwift.instance?.hideUnityWindow()
50.     }
51.  
52.     static func pauseUnity() {
53.         UnityEmbeddedSwift.instance?.pauseUnityWindow()
54.     }
55.  
56.     static func unpauseUnity() {
57.         UnityEmbeddedSwift.instance?.unpauseUnityWindow()
58.     }
59.  
60.     static func unloadUnity() {
61.         UnityEmbeddedSwift.instance?.unloadUnityWindow()
62.     }
63.  
64.     static func sendUnityMessage(_ objectName : String, methodName : String, message : String) {
65.         let msg : UnityMessage = UnityMessage(objectName: objectName, methodName: methodName, messageBody: message)
66.  
67.         // Send the message right away if Unity is initialized, else cache it
68.         if(UnityEmbeddedSwift.instance != nil && UnityEmbeddedSwift.instance.unityIsInitialized()) {
69.             UnityEmbeddedSwift.instance.ufw.sendMessageToGO(withName: msg.objectName, functionName: msg.methodName, message: msg.messageBody)
70.         }
71.         else {
72.             UnityEmbeddedSwift.cachedMessages.append(msg)
73.         }
74.     }
75.  
76.     // MARK - Callback from UnityFrameworkListener
77.  
78.     func unityDidUnload(_ notification: Notification!) {
79.         ufw.unregisterFrameworkListener(self)
80.         ufw = nil
81.         UnityEmbeddedSwift.hostMainWindow?.makeKeyAndVisible()
82.     }
83.  
84.     // MARK: - Private functions (called within the class)
85.  
86.     private func unityIsInitialized() -> Bool {
87.         return ufw != nil && (ufw.appController() != nil)
88.     }
89.  
90.     private func initUnityWindow() {
91.         if unityIsInitialized() {
92.             showUnityWindow()
93.             return
94.         }
95.  
96.         ufw = UnityFrameworkLoad()!
97.         ufw.setDataBundleId("com.unity3d.framework")
98.         ufw.register(self)
99. //        NSClassFromString("FrameworkLibAPI")?.registerAPIforNativeCalls(self)
100.  
101.         ufw.runEmbedded(withArgc: CommandLine.argc, argv: CommandLine.unsafeArgv, appLaunchOpts: UnityEmbeddedSwift.launchOpts)
102.  
103. // Added this line for touch events in Unity player to work
104. ufw?.appController()?.window?.windowLevel = UIWindow.Level(UIWindow.Level.normal.rawValue - CGFloat(globalUILevel))
105.  
106.         sendUnityMessageToGameObject()
107.  
108.         UnityEmbeddedSwift.instance = self
109.     }
110.  
111.     private func showUnityWindow() {
112.         if unityIsInitialized() {
113.             ufw.showUnityWindow()
114.             sendUnityMessageToGameObject()
115.         }
116.     }
117.  
118.     private func hideUnityWindow() {
119.         if(UnityEmbeddedSwift.hostMainWindow == nil) {
120.             print("WARNING: hostMainWindow is nil! Cannot switch from Unity window to previous window")
121.         }
122.         else {
123.             UnityEmbeddedSwift.hostMainWindow?.makeKeyAndVisible()
124.         }
125.     }
126.  
127.     private func pauseUnityWindow() {
128.         ufw.pause(true)
129.     }
130.  
131.     private func unpauseUnityWindow() {
132.         ufw.pause(false)
133.     }
134.  
135.     private func unloadUnityWindow() {
136.         if unityIsInitialized() {
137.             UnityEmbeddedSwift.cachedMessages.removeAll()
138.             ufw.unloadApplication()
139.         }
140.     }
141.  
142.     private func sendUnityMessageToGameObject() {
143.         if (UnityEmbeddedSwift.cachedMessages.count >= 0 && unityIsInitialized())
144.         {
145.             for msg in UnityEmbeddedSwift.cachedMessages {
146.                 ufw.sendMessageToGO(withName: msg.objectName, functionName: msg.methodName, message: msg.messageBody)
147.             }
148.  
149.             UnityEmbeddedSwift.cachedMessages.removeAll()
150.         }
151.     }
152.  
153.     private func UnityFrameworkLoad() -> UnityFramework? {
154.         let bundlePath: String = Bundle.main.bundlePath + "/Frameworks/UnityFramework.framework"
155.  
156.         let bundle = Bundle(path: bundlePath )
157.         if bundle?.isLoaded == false {
158.             bundle?.load()
159.         }
160.  
161.         let ufw = bundle?.principalClass?.getInstance()
162.         if ufw?.appController() == nil {
163.             // unity is not initialized
164.             //            ufw?.executeHeader = &mh_execute_header
165.  
166.             let machineHeader = UnsafeMutablePointer<MachHeader>.allocate(capacity: 1)
167.             machineHeader.pointee = _mh_execute_header
168.  
169.             ufw!.setExecuteHeader(machineHeader)
170.         }
171.         return ufw
172.     }
173. }
174.  

Code (CSharp):

1. import UIKit
2.  
3. class UnityGameViewController: UIViewController {
4.  
5.     @IBOutlet weak var unityView: UIView!
6.  
7.     override func viewDidLoad() {
8.         super.viewDidLoad()
9.      
10.         UnityEmbeddedSwift.showUnity()
11.              
12.         let uView = UnityEmbeddedSwift.getUnityView()
13.      
14.         DispatchQueue.main.asyncAfter(deadline: .now() + 0.2, execute: {
15.             self.unityView.addSubview(uView!)
16.          
17.             DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
18. //                self.view.sendSubviewToBack(uView!)
19.             })
20.         })
21.      
22.         // Do any additional setup after loading the view.
23.     }
24.  
25.     /*
26.     // MARK: - Navigation
27.  
28.     // In a storyboard-based application, you will often want to do a little preparation before navigation
29.     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
30.         // Get the new view controller using segue.destination.
31.         // Pass the selected object to the new view controller.
32.     }
33.     */

 

Can you give that fork? XcodeApi rep has 404 on opening?

 

Integration Unity as a Lib with iOS16.0.1(20A371,iPhone14Pro Max) failed.

- OS:iOS16.0.1-20A371
- Device:iPhone14Pro Max
- Unity: Unity 2021.3.10f1 and 2022.1.16f1

 

I got this error too but on iPhone13 Pro Max and Unity 2021.3.9f1
Any Solution?

 

Hi,
Unlinking from XCode, re- launch the app works fine. But you can not debug with xcode.

 

Hi All.
I've recently integrated IOS into a new SwiftUI project.
This is with Unity 2019.4 and XCode 14.

I've used @DavidPeicho solution from here:

https://davidpeicho.github.io/blog/unity-swiftui-integration-revisited/

Which works great, however, I didn't like changing the Swift UI app and adding the UIKit lifecycle.

After doing some research I found this:

https://www.fivestars.blog/articles/app-delegate-scene-delegate-swiftui/

Which led me to just change my app to this:

import SwiftUI



@main

struct NeuosApp: App {

    @UIApplicationDelegateAdaptor var delegate: AppDelegate

  

    var body: some Scene {

        WindowGroup {

            ContentView()

        }

    }

}

Everything else stayed the same.

Thought I'd share this with the community.

 

There's a solution (or more like a workaround) to this in different thread: https://forum.unity.com/threads/unity-2021-3-6f1-xcode-14-ios-16-problem-unityframework-crash-before-main.1338284.

Basically you need to disable the Thread Performance Checker in the Scheme.

 

Linking this awesome showcase here, valuable information.
all credit to @Neonlyte
https://forum.unity.com/threads/unity-as-a-library-rendered-on-partial-screen-with-swiftui.1398856/

 

Here is a fork of @DavidPeicho original solution with improvements that achieve the following:

• The Unity player is rendered in a SwiftUI view that can be resized, repositioned, and used like any normal SwiftUI element
• The player can be removed or re-added to the UI any time
• Touch interactions work as you would expect
• The bug that could prevent unity from appearing is fixed
• Tested on 2020.2.1f1and 2021.3.18f1

See the pull request for more detailed explanation.