Adding icon.png reference to XCode?

I just spent over an hour due to yet another XCode quirck. I added my icon.png by 'Adding an existing file' (w/ the checkbox checked for that copy option). 开发者_Python百科The binary upload to AppStore kept throwing an error.

Then, I finally tried to just drag-n-drop the icon.png file into XCode. This prompted me to do the same thing (and yes, i checked that copy option thing). This allowed the binary verification to pass and consequentially the binary file got uploaded.

Question is: What did I do wrong? I didn't think there was a difference between 'Adding and existing file' and dragging the file into XCode!

Have you added the Icon (or Icons) reference to your info.plist?