How to Implement shake gestures in an Apple Watch application?

Question

The WatchKit reference seems to make no mention about it. Have I missed something? Or is it really not possible to implement a shake gesture in an Apple Watch application?

The following is a typical example of a shake gesture implementation on iOS:

// MARK: Gestures
override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent) {
    if(event.subtype == UIEventSubtype.MotionShake) {
        // do something
    }
}

Answer 1

No, it is not possible to do anything having to do with UIEvents in WatchKit right now, with the current solution's "remoted UI" approach where you mostly just get to tell the watch how to use the pre-arranged UI from the storyboard and react to actions like tapping a button or a table row. There will be support for a lot more code running on the watch later this year, according to Apple.

Update: Native apps are now possible for watchOS 2. This functionality may be present.

Answer 2

This is now possible in Watch OS2 with CMMotionManager a part of CoreMotion.

You can have this workaround.

let motionManager = CMMotionManager()
if (motionManager.accelerometerAvailable) {
   let handler:CMAccelerometerHandler = {(data: CMAccelerometerData?, error: NSError?) -> Void in

       if (data!.acceleration.z > 0) {
          // User did shake
       }
   }
   motionManager.startAccelerometerUpdatesToQueue(NSOperationQueue.currentQueue()!, withHandler: handler)
}

Answer 3

How Roger say, an workaround is use the CoreMotion.

You can use coreMotion to get movement. I build this simple wrapper on my Github.