Tab Bar Icon doesn't show?

Question

I have ab/w PNG that is 48x60. When I set the icon image in the properties window, I just get a grey gradient rectangle instead of the image I selected.

Answer 1

The images for tab bars and toolbars are actually alpha masks, not complete images. Only the alpha channel of the image is used.

Answer 2

Tab Bar icon should be 30*30 and 60*60 for Retina Display... Put your icone 30*30 in the Inspector tool, and name the 60*60 one with the same name adding @2x at the end of its name. Example : tabicon1.png (30*30) tabicon1@2x.png (60*60)