So I've made a few small changes in my app and upgraded to xCode 9.
Now I can't validate my build as I've got an alpha transparency in my in my store icon in the assets file.
The discussion forums seem to say this is a new xcode bug but you have to edit every image to jpg not png. So i've made changed all my icons and removed the alpha channel from the objects but it still fails.
In xcode the icons still show as png and it's possible i've not converted every object graphic although there are hundreds to look through.
Does anyone know how to overcome this. Is there a way of stopping the jpgs being converted to png or a way of finding the offending images in xcode.