Can you detect a two-finger click?

Question

Created Nov ’15

Replies 3

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Participants 4

I'd like to notice when a user clicks their Siri remote with two fingers on the trackpad instead of one. (A one-finger click increments; I'd like a two-finger click to decrement.) Is there a way to do this? A UITapGestureRecognizer with numberOfTouchesRequired set to 2 seems like the obvious solution, but it doesn't seem to be getting me anywhere.

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Answer 1

KMT OP

Nov ’15

tvOS supports two gestures, but not sure about twin simultaneous discrete clicks... I think a click is a click.

See https://developer.apple.com/library/tvos/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/GestureRecognizer_basics/GestureRecognizer_basics.html

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Answer 2

Aplmik2424 OP

Dec ’15

If UITapGestureRecognizer isn't working for you try implementing touchesEnded. Haven't tested this, but think this should point you in the right direction

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
     switch([touches count]) {
          case 1: {
               [self doSingleTouchThing];
               break;
          }
          case 2: {
               [self doDoubleTouchThing];
               break;
          }
     }
}

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Answer 3

Engineer OP

Apple

Dec ’15

UIKit won't recognize more than a single touch on the Siri Remote trackpad, so numberOfTouchesRequired is ignored: there can only ever be one touch at a time. That property is marked as prohibited on tvOS, so I'm not sure how you're even able to set that property: it should be a compiler error to try to use it.

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