HQHeartRateWaveform

    let heartLiveView = HeartLiveView.init(frame: CGRect.init(x: 10, y: 100, width: self.view.frame.width - 20, height: 150))
    self.view.addSubview(heartLiveView)
    
    timer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) { (timer) in
        let heartRateMappValue = Float.randomCGFloatNumber(lower: -0.5, upper: 0.5)
        print(heartRateMappValue)
        heartLiveView.drawRateWithPoint(NSNumber.init(value: heartRateMappValue))
    }