The new Jucer has for the XCode exporter the field “Object C Class name suffix”. I think I had some time ago the warning that JUCE_ObjCExtraSuffix wasn’t defined and should be ( a #warning inside the source). After that I added a JUCE_ObjCExtraSuffix=‘something’ to the preprocessor definition.
Now I’m not quite sure whether I really need that. I suppose defining the ‘something’ in the Object C Class name suffix field should be sufficient, but since I’m not sure I thought I’d better ask.