Unity升级至2017.3.1f1后Cardboard VR功能失效求助

Hey Niklas, sorry to hear you hit this frustrating roadblock after upgrading Unity versions—those tiny point releases can sometimes sneak in unexpected changes! Let's walk through some targeted fixes that should get your Cardboard VR mode up and running again in 2017.3.1f1:

• Double-check your XR Settings (they might have reset)
  Head to Edit > Project Settings > Player, switch to the Android tab, and scroll down to XR Settings. Make sure:

  • "Virtual Reality Supported" is still checked
  • "Cardboard" is present in the Virtual Reality SDKs list, and it's at the top of the stack (Unity prioritizes SDKs in order)
  • Also verify that "Require Gyroscope" is enabled under Android-specific settings—this ensures the app detects VR hardware on launch.

• Force VR mode via script (explicit enable might now be needed)
  Even though you didn't need this before, the 2017.3.1f1 update might have adjusted how VR initialization works. Add a simple script to your initial scene's root object:

  using UnityEngine;
  using UnityEngine.XR;
  
  public class VRInitializer : MonoBehaviour
  {
      void Start()
      {
          // Load Cardboard VR device
          XRSettings.LoadDeviceByName("Cardboard");
          // Enable VR mode explicitly
          XRSettings.enabled = true;
      }
  }
  

  You can set this script's execution order to a higher priority if you need it to run before other scene logic.

• Check for version-specific regressions
  Sometimes point releases introduce unintended bugs. Look up Unity's official release notes for 2017.3.1f1 to see if there are reported issues with Cardboard VR initialization. If you find a confirmed bug, you might need to roll back to 2017.3.0f0 temporarily or wait for a patch release.

• Inspect your AndroidManifest.xml
  Unity might not have generated the correct manifest after the upgrade. Try exporting the project as an Android Studio project, open the AndroidManifest.xml, and ensure it includes:

  • The meta-data tag for VR: <meta-data android:name="com.google.vr.vrcore" android:value="optional"/>
  • Necessary permissions like android.permission.NFC (if you use NFC pairing for Cardboard)
    If anything's missing, add these lines manually, then place the modified manifest in your Unity project's Assets/Plugins/Android folder.

• Verify your Main Camera setup
  After upgrading, VR-related components on your Main Camera can sometimes go missing. Select your Main Camera and check that it has the Virtual Reality Camera component attached. If it's not there, add it manually via Component > XR > Virtual Reality Camera.

Give these steps a try one by one—odds are it's either a reset setting or a need for explicit initialization. Let me know if any of these get your VR mode working again!

内容的提问来源于stack exchange，提问作者user8136984