Images can't contain alpha channels or transparencies

Question

Apple has released new version of iTunes Connect & I got an error message when I tried to set Screenshots on itunes connect for my app.

\"Images can\'t c         


        

Answer 1

Still a problem in 2019 :=)

This worked for me: Select all images you want to upload -> Right click -> Open in Preview -> Export -> Uncheck alpha -> Use the exported images.

Answer 2

Use mogrify tool from ImageMagick package to remove alpha channel.

brew install imagemagick
cd folder_with_images
mogrify -alpha off */*.png

Update from May 3

You can tell whether image contains alpha channel by running:

sips -g all image.png

In case you render screenshots in iOS Simulator you can drop alpha channel by passing BOOL opaque = YES to UIGraphicsBeginImageContextWithOptions:

UIGraphicsBeginImageContextWithOptions(imageSize, YES, 0); 

Answer 3

For this i made a new simple tool. You can remove alpha channel (transparency) of multiple .png files within seconds.

You can download from here http://alphachannelremover.blogspot.com

Answer 4

Convert your PNG image to JPEG format.

Answer 5

Faced same issue, Try using JPG format !!