I get an error saying

"collection element of Type ‘STMeshWriteOptionFileFormat’ is not an objective C object. Is this a swift changes? really need help. (non - programmer)


No, it is not Swift code. It seems to me that you aren’t implementing STMeshWriteOptionFileFormat correctly, but without directly seeing your code, it is hard to tell.

Please have a look at the following forum post for more information on how to use STMeshWriteOptionFileFormat correctly: