User interaction stop working when Start/Stop VR and dismiss current view controller

[jp-lno]

I've embeded Unity project in native iOS app.
Everything is working here. I can open my unity nonVR scene, back to native view with a quit button.
When my view is unity scene mode I can toggle from VR to nonVR view.

The problem is if in my unity view I start&stop VR and quit unity to go back to my native view, touch support stop working. I made some tests and it seems that when appWillResignActive() is called, Unity
go in pause mode as usual, my app go back to my native viewController.
But touch handler is lock and UnityView don't disappear.

This problem happened only if I've enabled GVR at least on time.
Everything is working fine if I just go and back from native view to unity view without GVR Singleton loaded.

Any idea about this issue and how can I solve it ? Did I miss something ?

Found using:

• Google VR SDK version: 1.100.0
• Unity version: 2017.1.2p2
• Phone manufacturer, model, and O/S version: Apple iPhone 6s, iOS 11.1.1
• Viewer manufacturer & model: n/c

Steps to reproduce the issue:

1. Embed unity app in native iOS app.
2. Start Unity
3. Toggle on/off VR mode
4. Back to native view controller with quit button that has documented call appWillResignActive() and Pause Unity

• If VR mode is never used, Unity pause and touch handler + display back to native previous viewController
• if VR mode is used, Unity pause, touch and display are frozen. Native app is still active from background but Unity view stay at the top...

[rusmaxham]

Can you share a repro project for us to look at?

[jp-lno]

Hi @rusmaxham,
Here is a link to sample project: MyApp

I've embed everything so just download and run on iOS 11 device

How to:

• Open Unity with button
• Quit Unity from X button
• Open Unity again with button (Everything is working here)
• Enable Cardboard with right bottom cardboard button
• Close VR by using left arrow button
• Quit Unity from X button
• Here you are in case where if GVR is used, view go back to native one, but handler stay on Unity. At this point you can't use button to Open Unity...

Hope you will help me. Thanks

[jiulongw]

Haven't try your demo but have you tried instead of adding GetUnityGLView() as a subview, presenting GetUnityGLViewController() as a full screen view controller?

I was trying to fix a weird problem regarding entering / exiting Unity from Swift project and found out presenting whole view controller has less issue than adding sub view, especially I believe in your case, your sub view takes the whole screen anyway...

[jp-lno]

Hi @jiulongw,
Thanks for answer. I've already tried to use UnityGetGLViewController() and presenting it from view, but the issue is the same. No touch if GVR was enabled.

Here is the code I use:

@IBAction func showUnityViewBtn(_ sender: Any) {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.startUnity()
        let when = DispatchTime.now() + 3 // Wait n seconds to hide Unity loading :P
        DispatchQueue.main.asyncAfter(deadline: when) {
            self.present(UnityGetGLViewController(), animated: true, completion: nil)
        }
    }
    
    @objc func exitUnity() {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.stopUnity()
        
        appDelegate.myOrientation = .portrait
        UnityGetGLViewController().dismiss(animated: true, completion: nil)
    }    

Thanks

[jp-lno]

Does anybody try my project and eventually know what's happen ?
This issue is the only one on my project and drive me crazy. I really can't find a solution to solve it..

Thanks

[bnussey]

Hi @jplongo have downloaded your project and have replicated the issue.. Although had to tweak to get it to run as you hard coded /Users/jp/Documents/Dev/iOS/Perspective/VR/GVRSDK/Libraries/libGVRSDK.a

Did you ever resolve this?

[jp-lno]

Nope unfortunately the issue is still here. No solutions for me now.
The .a library come from pod when you build gvrsdk. So I certainly forgot to embed it in the sources.

[bnussey]

Hey @jplongo have you tried updating to latest version of gvr-unity-sdk? I noticed there is a recent release.

[jp-lno]

Yes, I build my project with grr-sdk-unity 1.120.0 and iOS build using gvr-sdk-ios 1.100.0.
But unfortunately issue is still here :/

[franckos]

Hello @jplongo. I'm facing the exact same issue, using Unity 5.6 with GVR 1.80
Did you found a solution for your bug?

[jp-lno]

Unfortunately nope. Same issue on last Unity/GVRSDK release. Bug is still here...