I got log that "You have changed the icon for ~", but icon was not changed. There is no error and warning.
I set assets, Alternate App Icon Sets, info and checked "include all app icon assets".
here is info
<key>CFBundleIcons</key>
<dict>
<key>CFBundlePrimaryIcon</key>
<dict>
<key>CFBundleIconFiles</key>
<array>
<string>AppIcon</string>
</array>
<key>UIPrerenderedIcon</key>
<false/>
</dict>
<key>CFBundleAlternateIcons</key>
<dict>
<key>blackCircle</key>
<dict>
<key>CFBundleIconFiles</key>
<array>
<string>blackCircle</string>
</array>
<key>UIPrerenderedIcon</key>
<false/>
</dict>
</dict>
</dict>
blackCircle is a name of image in assets.
I wrote blackCircle in Alternate App Icon Sets.
I don't know what to do. I tried all I could find in website