Unity 导入VRTK发生报错

问题

报错：

1. Assets\VRTK\Source\SDK\Base\SDK_BaseHeadset.cs(150,57): error CS0117: 'XRDevice' does not contain a definition for 'model'
2. Assets\VRTK\Source\Scripts\Utilities\VRTK_DeviceFinder.cs(430,69): error CS0117: 'XRDevice' does not contain a definition for 'model'
3. Assets\VRTK\Source\Scripts\Utilities\SDK\VRTK_SDKManager.cs(918,22): error CS0619: 'XRDevice.isPresent' is obsolete: 'This is obsolete, and should no longer be used. Instead, find the active XRDisplaySubsystem and check that the running property is true (for details, see XRDevice.isPresent documentation).'

解决方案

Unity版本过高，导致VRTK3.3使用的API已经被弃用了，需要降版本，如2019.4