[WM22] iOS - Change images programmatically with swipe (no replies)

Good Morning

On Android I changed the image using a this code in the swipe event:

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IF Gesture.Direction = RightToLeft AND Gesture.Speed > 500 THEN
gnPosition++
ChangePage()
END

IF Gesture.Direction = LeftToRight AND Gesture.Speed > 500 THEN
gnPosition--
ChangePage()
END

------------------------------------------------------------------

But in iOS I can't use the variable Gesture.Direction and Gesture.Speed.
Any idea how to recreate this functionality for iOS?

Thanks in advance
David Cabrera