以下是個人理解,如有不對,輕噴:

網(wǎng)上給的大部分方法是調(diào)取系統(tǒng)的"健康"APP(HealthKit 庫)的數(shù)據(jù),但不是調(diào)取"運動與健康"(CoreMotion 庫)的數(shù)據(jù).

而系統(tǒng)的"健康"APP,需要每次打開"健康"APP時才從"運動與健康"更新數(shù)據(jù),而如果使用HealthKit庫獲取步數(shù),因為是從"健康"APP獲得步數(shù)等數(shù)據(jù),所以如果不打開"健康"APP,那么自己的APP獲得的數(shù)據(jù)不是最新的.

因此調(diào)用CoreMotion庫,從系統(tǒng)的"運動與健康"中獲取實時數(shù)據(jù),才能保證步數(shù)最新

    @IBAction func stepAction(_ sender: UIButton) {
        
        if !CMPedometer.isStepCountingAvailable(){
            return
        }
        let calendar = NSCalendar.current
        let now = Date.init()

        var components = calendar.dateComponents([.year,.month,.day,.hour,.minute,.second], from: now)
        components.hour = 0
        components.minute = 0
        components.second = 0
        
        let startDate = calendar.date(from: components)
        let endDate = calendar.date(byAdding: .day, value: 1, to: startDate!)
        
        stepcounter.queryPedometerData(from: startDate!, to: endDate!) { [weak self] (pedData, error) in
            self?.updateStepCountLabels(data: pedData!)
        }
       
    }

    func updateStepCountLabels(data : CMPedometerData) {
        print(data)
        DispatchQueue.main.async {[weak self] in
            self?.stepLabel.text = String.init(format: "步數(shù)：%@", data.numberOfSteps)
        }
    }