Live Updates with CMPedometer (CoreMotion)

Question

I\'ve found very limited resources on this topic (CMPedometer). I was wondering if anyone here has managed to get this to work properly. My code is fairly simple, and has mo

Answer 1

I can only confirm your findings. I also wanted to get "true" realtime information. As it seems at this point, the API is not capable of this; even by forcing the updates into a queue, sync, async, etc.

For references and others with this question, here is the code I use based on Swift 3 and Xcode 8.2. I simply apply this portion of code in the concerned viewcontroller, after checking the CMPedometer.isStepCountingAvailable().

As you can see, I've included a small animation to update the UILabel in a more fluid manner.

    // Steps update in near realtime - UILabel
    self.pedoMeter.startUpdates(from: midnightOfToday) { (data: CMPedometerData?, error) -> Void in

        DispatchQueue.main.async(execute: { () -> Void in
            if(error == nil){
                self.todaySteps.text = "\(data!.numberOfSteps)"
                // Animate the changes of numbers in the UILabel
                UILabel.transition(with: self.todaySteps,
                                   duration: 0.50,
                                   options: .transitionCrossDissolve,
                                   animations: nil,
                                   completion: nil)
            }
        })
    }