I creatd a Callout with a content that would require another Callout ( like a Volume Slider ) It all works fine, however, when I close the second Callout the first also gets closed.
Can this be turned off?
You tried to set callout.isModal = false?
Yes, but that does not help.
I guess I'll have to deal with the PopUpManager since a Callout was not meant to be within another one it seems.
Apple's Human Interfere Guidelines say not to nest callouts (Apple calls them popovers):
Show one popover at a time. Displaying multiple popovers clutters the interface and causes confusion. Never show a cascade or hierarchy of popovers, in which one emerges from another. If you need to show a new popover, close the open one first.
However, there are properties that give you full control over how a callout may close itself. For instance, closeOnTouchBeganOutside and closeOnTouchEndedOutside.