Not Working in ios 12 and xcode 10

[nikunjarora12345]

App crashes on GLTFUnarchiver.swift, line 1036 with a message: "Fatal error: Unexpectedly found nil while unwrapping an Optional value".

An older app built using xcode 9.x was working, but threw the same error when built on xcode 10.

[ThomasJones]

I'm seeing this issue running the Mac version of the sample as well.

[daametsi]

Fixed by making sure all relevant shaders were added to the macOS/iOS projects.

[mihaierosx2]

Are you referring to these?

GLTFShaderModifierSurface_pbrSpecularGlossiness_doubleSidedWorkaround.shader
GLTFShaderModifierSurface_pbrSpecularGlossiness_texture_doubleSidedWorkaround.shader
GLTFShaderModifierSurface_pbrSpecularGlossiness.shader

And:

GLTFShaderModifierSurface.shader
GLTFShaderModifierSurface_alphaModeBlend.shader
GLTFShaderModifierSurface_doubleSidedWorkaround.shader
GLTFShaderModifierFragment_alphaCutoff.shader

Because I changed the target membership on them and it still doesn't work...

[mihaierosx2]

It actually works with iOS 12, still no success on macOS Mojave 10.14.12.

[digitallysavvy]

It works on iOS 12. If you are getting nil errors due to shader its because you aren't properly embedding the framework. If you aren't using a dependency manager you may have missed the build flag that is set. Did you make sure to add the build flags?

SWIFT_ACTIVE_COMPILATION_CONDITIONS" => "SEEMS_TO_HAVE_VALIDATE_VERTEX_ATTRIBUTE_BUG SEEMS_TO_HAVE_PNG_LOADING_BUG"