iOS development-Images can ' t contain alpha channels or transparencies solution

The new itunesconnect is really a problem ... The egg is killing me.

When you upload an introduction picture (screenshot), you encounter this problem

Images can ' t contain alpha channels or transparencies. The picture cannot contain an alpha channel or a slide.

The solution is to save the image in JPG format so that the alpha channel can be removed and then saved in PNG format so that it can be uploaded successfully.

But now, I find that using Xcode screen shots directly, uploading screenshots like this also prompts this: Images can ' t contain alpha channels or transparencies.

.. Keng.