ios - Gesture recognition in Apple Watch (WatchKit)

Question

I'm looking for how to detect gestures in an Apple Watch app, via the WatchKit SDK. In iOS we can use some code like this:

- (void)viewDidLoad
{
    ...
    UISwipeGestureRecognizer *swipeRightBlack = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(slideToRightWithGestureRecognizer:)];
    swipeRightBlack.direction = UISwipeGestureRecognizerDirectionRight;
    [self.viewBlack addGestureRecognizer:swipeRightBlack];
}

...but this doesn't work in the Apple Watch simulator. Is there a way to override the default gesture actions using WatchKit, or just recognize them when the OS receives them?

Answer 1

watchOS 3 adds third-party support for WKGestureRecognizer.

Apple has also updated their WatchKit Catalog sample code to include a WKInterfaceController gesture example demonstrating how to use various gestures on the Apple Watch.

Here's a snippet from their code showing two of the actions for gestures configured in Storyboard:

class GestureDetailController : WKInterfaceController {
    @IBOutlet var tapGroup: WKInterfaceGroup!
    @IBOutlet var panGroup: WKInterfaceGroup!

    ...

    @IBAction func tapRecognized(_ sender: AnyObject) {
        tapGroup.setBackgroundColor(UIColor.green())
        scheduleReset()
    }

    @IBAction func panRecognized(_ sender: AnyObject) {
        if let panGesture = sender as? WKPanGestureRecognizer {
            panGroup.setBackgroundColor(UIColor.green())
            panLabel.setText("offset: (NSStringFromCGPoint(panGesture.translationInObject()))")
            scheduleReset()
        }
    }