如何在 iPad 上使用 CMPedometer？

Question

我一直在探索计步器并尝试使用一个简单的应用程序来计算您的步数。这在 iPhone 上完美运行，但是当运行在 iPad 上时，它无法计算任何步骤。

我导入了 CoreMotion 并添加了使用说明。

是否有任何原因导致应用无法在 iPad 上运行？

@IBAction func startStopButton(_ sender: UIButton) {
    if sender.titleLabel?.text == "Start"{
        //Start the pedometer
        stepsLabel.text = "Steps: 0"
        distanceLabel.text = "Distance: N/A"
        
        pedometer = CMPedometer()
        startTimer()
        pedometer.startUpdates(from: Date(), withHandler: { (pedometerData, error) in
            if let pedData = pedometerData{
                self.numberOfSteps = Int(truncating: pedData.numberOfSteps)
                //self.stepsLabel.text = "Steps:\(pedData.numberOfSteps)"
                if let distance = pedData.distance{
                    self.distance = Double(truncating: distance)
                }
                if let averageActivePace = pedData.averageActivePace {
                    self.averagePace = Double(truncating: averageActivePace)
                }
                if let currentPace = pedData.currentPace {
                    self.pace = Double(truncating: currentPace)
                }
            } else {
                self.numberOfSteps = nil
            }
        })
        //Toggle the UI to on state
        statusTitle.text = "Pedometer On"
        sender.setTitle("Stop", for: .normal)
        sender.backgroundColor = stopColor
    } else {
        //Stop the pedometer
        pedometer.stopUpdates()
        stopTimer()
        //Toggle the UI to off state
        statusTitle.text = "Pedometer Off: "
        sender.backgroundColor = startColor
        sender.setTitle("Start", for: .normal)
    }
}

//MARK: - timer functions
func startTimer(){
    if timer.isValid { timer.invalidate() }
    timer = Timer.scheduledTimer(timeInterval: timerInterval,target: self,selector: #selector(timerAction(timer:)) ,userInfo: nil,repeats: true)
}
 
func stopTimer(){
    timer.invalidate()
    displayPedometerData()
    
    if let distance = self.distance {
        
        let milesString = (String(format: "%.2f", self.miles(meters: self.distance)))
    
    let alert = UIAlertController(title: "Save your distance of \(milesString) Miles", message: "You can add the counted distance to all runners now or add them individually by swiping them right on the home screen and adding lap. This will add the distance to the runner you select.", preferredStyle: UIAlertController.Style.alert)
             // add an action (button)
            alert.addAction(UIAlertAction(title: "Add to all", style: UIAlertAction.Style.default, handler: { action in
             
                
                for index in self.distancesArray.indices {
                    self.distancePerLapMiles = self.miles(meters: self.distance)
                    self.distancesArray[index] += self.distancePerLapMiles
                    print("index is \(index)")
                }
                
                self.tableView.reloadData()
                self.saveData()
                
                self.allViewsOff()
              
                 }))
            alert.addAction(UIAlertAction(title: "Add Individually", style: UIAlertAction.Style.default, handler: { action in
                    
                self.distancePerLapMiles = self.miles(meters: self.distance)
                self.allViewsOff()
                          
                             }))

        alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil))
    
            self.present(alert, animated: true, completion: nil)
        
    }
}
 
@objc func timerAction(timer:Timer){
    displayPedometerData()
}
// display the updated data
func displayPedometerData(){
    timeElapsed += 1.0
    statusTitle.text = "Steps are being Counted"
    //Number of steps
    if let numberOfSteps = self.numberOfSteps{
        stepsLabel.text = String(format:"Steps: %i",numberOfSteps)
    }
    //distance
    if let distance = self.distance{
        distanceLabel.text = String(format:"Distance: \n \n %02.02f meters,\n \n %02.02f miles",distance,miles(meters: distance))
    } else {
        distanceLabel.text = "Distance: N/A"
    }
}
 
//MARK: - Display and time format functions
 
// convert seconds to hh:mm:ss as a string
func timeIntervalFormat(interval:TimeInterval)-> String{
    var seconds = Int(interval + 0.5) //round up seconds
    let hours = seconds / 3600
    let minutes = (seconds / 60) % 60
    seconds = seconds % 60
    return String(format:"%02i:%02i:%02i",hours,minutes,seconds)
}
// convert a pace in meters per second to a string with
// the metric m/s and the Imperial minutes per mile

func miles(meters:Double)-> Double{
    let mile = 0.000621371192
    return meters * mile
}

Answer 1

并非所有设备都具有支持计步所需的硬件。

您应该检查 isStepCountingAvailable 的值。如果它 returns false 则步数计数在设备上不可用。

如何在 iPad 上使用 CMPedometer？

How to use CMPedometer on an iPad?

ios

core-motion

swift