>If Apple makes their private API public, it is then possibly infringing.
No, it's not. From list views to buttons to menubars and keyboards, almost all iOS widgets (private to Apple or usually public) have alternative third party implementations. Nobody is going after them.
You are actually supposed and encouraged to create your own versions of widgets - Cocoa is especially good for that, and there are even instructions in the Apple Developer Network for how to customize views and such.
Doing their own popup widget wont get them into trouble, period.
No, it's not. From list views to buttons to menubars and keyboards, almost all iOS widgets (private to Apple or usually public) have alternative third party implementations. Nobody is going after them.
You are actually supposed and encouraged to create your own versions of widgets - Cocoa is especially good for that, and there are even instructions in the Apple Developer Network for how to customize views and such.
Doing their own popup widget wont get them into trouble, period.