is it possible to interact with WKInterfacePicker object also with the fingers, not only with the digital crown?
thanks a lot
No you cannot interact that way, the only way to interact with WKInterfacePicker is via digital crown. As mentioned in the link http://www.toptal.com/ios/apple-watch-in-a-nutshell
User interaction (or wearer interaction, if preferred) can occur in 4 different ways:
simple touch: a tap on a button is a typical example
force touch: activated by applying more force when tapping and holding the screen. Similar to the right mouse click on a PC it will display a contextual menu (containing up to 4 items)
gesture: vertical swipe to scroll, horizontal swipe to navigate between pages, left edge swipe to navigate back
digital crown: hardware input used for fine tuned scrolling