判断一个坐标点是否在封闭曲线内的方法(swift)

 //用playground运行即可
 import UIKit

 var str = "Hello, playground"

 let lTestPointsOne : [(Double, Double)]  = [(,)]
 let lTestPoints : [(Double, Double)]  = [(,),(,),(,)]
 let lPoints : [(Double, Double)]  = [(,),(,),(,),(,),(,),(,)]

 func judgeIf(point:(Double,Double), isIn pointArr:[(Double, Double)])->Bool{
     if  == pointArr.count {
         return false
     }
     let lPath = UIBezierPath.init()
     let l1stPoint = pointArr.first
     lPath.move(to: CGPoint.init(x: l1stPoint!., y: l1stPoint!.))

     for i in ..<pointArr.count {
         let lP = pointArr[i]
         lPath.addLine(to: CGPoint.init(x: lP., y: lP.))
     }

     lPath.close()
     return lPath.contains(CGPoint.init(x: point., y: point.))
 }

 print(lPoints)
 judgeIf(point: (,), isIn: lPoints)
 judgeIf(point: (,), isIn: lPoints)
 judgeIf(point: (,-), isIn: lPoints)
 judgeIf(point: (0.5,), isIn: lPoints)
 judgeIf(point: (,), isIn: lPoints)
 judgeIf(point: (,), isIn: lPoints)
 judgeIf(point: (,0.5), isIn: lPoints)
 judgeIf(point: (,1.5), isIn: lPoints)
 judgeIf(point: (,), isIn: lPoints)
 judgeIf(point: (3.3,8.1), isIn: lPoints)

 judgeIf(point: (,), isIn: lTestPoints)
 judgeIf(point: (,), isIn: lTestPoints)
 judgeIf(point: (0.5,0.5), isIn: lTestPoints)
 judgeIf(point: (0.5,0.7), isIn: lTestPoints)
 judgeIf(point: (0.5,0.1), isIn: lTestPoints)
 judgeIf(point: (,), isIn: lTestPoints)
 judgeIf(point: (,), isIn: lTestPoints)

 judgeIf(point: (,), isIn: lTestPointsOne)
 judgeIf(point: (,), isIn: lTestPointsOne)