Blurred background app
It used to require an entitlement for an iOS app to have a transparent background, showing through to the user's wallpaper. It looks like that's not the case anymore as of iOS 13. By setting the key UIApplicationIsOpaque
to NO
in your Info.plist
, it's possible to have an app with a transparent background.
By using a visual effect view, it's possible to have an app with a blurred, vibrant background based on the user's wallpaper. That technique is demonstrated in this app.
Disclaimer: It's confirmed that this is a bug, so Apple will probably reject your app.