How to completely block touch interaction in the upper half of the display?

I would like to completely block touch interaction on the top half of the display and only allow it on the bottom half. And in such a way that touching the top half doesn't even generate a UIEvent.

I would like to make an app where a physical object can be placed on the upper half of the display. This physical object generates many touch events and as a result the lower half of the display is no longer operable. Setting userInteractionEnabled to false on the top UIView doesn't help, because the touch events are still generated on the internal level. Is there a trick to completely deactivating the touch in the upper half so that the maximum possible number of touches is not exhausted by the item placed on the display?

I'm afraid that it happens on the hardware level and my project is not feasible. But I still have a small hope that someone here knows a trick through the software to have the lower half of the display operable despite the object on the upper half of the display.

Setting userInteractionEnabled to false on the top UIView doesn't help, because the touch events are still generated on the internal level.

And what is the consequence ? Performance ? No interaction possible in lower view ?

Yes, the touch event is generated at hardware level and ignored and removed from the event queue (one queue per view).

Some details of low level operation: https://stackoverflow.com/questions/4288418/ios-touch-event

How to completely block touch interaction in the upper half of the display?
 
 
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