Hi everyone 👋 I’m a new iOS developer working on my first app and I’ve run into a frustrating visual bug involving my app icon during the launch/close transition.
Issue:
When I use Icon Composer (the new tool introduced for iOS 26) to generate my app icon, I consistently see a thin white border or “fringe” around the icon only during the transition animation (when the app opens or closes). It disappears once the animation ends.
What I tested and confirmed: • I exported the exact same design directly from Adobe Illustrator as a 1024×1024 PNG, fully opaque, RGB color mode, background color filling the entire canvas (no transparency, no borders, no rounded corners). • When I place that exported PNG directly into the AppIcon asset catalog in Xcode, the icon renders perfectly — no white fringe appears, just a slightly darker shade of blue during transitions (expected and acceptable). • But when I generate the icon using Icon Composer, the white edge always appears, even if I disable effects, use full coverage layers, or only keep a flat color layer.
Notes: • Tested on iOS 26 (latest beta) using Xcode 16. • The issue seems specific to Icon Composer’s export format or metadata — maybe it’s not stripping alpha correctly or something related to the squircle mask? • I followed all recommended specs: 1024×1024 px, PNG, sRGB, no transparency, exported from Illustrator at 72ppi with solid background.
- Even tested without the logo, just the icon made with icon composer
Is anyone else experiencing this issue with Icon Composer exports? Is there an official recommendation to avoid this during transitions or should I simply avoid Icon Composer for production icons for now and stick with Illustrator / Figma exports?
Thanks so much
Here’s a visual example: