         }
         
         //双指合拢或张开
-        let interval = self.kPerInterval / 2
+        let interval = pinchPerInterval / 2
         let scale = sender.scale
         let velocity = sender.velocity
         

                newRangeTo = self.rangeTo + interval
                newRangeFrom = self.rangeFrom - interval
                newRange = self.rangeTo - self.rangeFrom
                if newRange <= kMaxRange {
                    
                    if newRangeFrom >= 0 {
                        self.rangeFrom = newRangeFrom

open class CHKLineChartView: UIView {
    
    /// MARK: - 常量
    fileprivate static let kMinRange = 13       //最小缩放范围
    fileprivate static let kMaxRange = 133     //最大缩放范围
    fileprivate static let kPerInterval = 4    //缩放的每段间隔
    open let kYAxisLabelWidth: CGFloat = 46        //默认宽度
	open let kXAxisHegiht: CGFloat = 16        //默认X坐标的高度
	
	open var scaleRangeMin: Int = CHKLineChartView.kMinRange
	open var scaleRangeMax: Int = CHKLineChartView.kMaxRange
	open var pinchPerInterval: Int = CHKLineChartView.kPerInterval
	
    /// MARK: - 成员变量
    @IBInspectable open var upColor: UIColor = UIColor.green     //升的颜色
    @IBInspectable open var downColor: UIColor = UIColor.red     //跌的颜色
