override func viewDidLoad() {        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.        self.view = NineCellLockView(frame: CGRectZero)    }

import UIKitclass NineCellLockView: UIView {        var fingerPoint:CGPoint = CGPoint()    var linePointointCollection:Array<CGPoint> = Array<CGPoint>()    var ninePointCollection:Array<CGPoint> = Array<CGPoint>()        var selectPointIndexCollection:Array<Int> = Array<Int>()            var circleRadius:CGFloat = 28    var circleCenterDistance:CGFloat = 96    var firstCirclePointX:CGFloat = 96    var firstCirclePointY:CGFloat = 200        func FillNinePointCollection()    {        for row in 0...2        {            for column in 0...2            {                let tempX:CGFloat = CGFloat(column)*self.circleCenterDistance + self.firstCirclePointX                let tempY:CGFloat = CGFloat(row)*self.circleCenterDistance + self.firstCirclePointY                self.ninePointCollection.append(CGPoint(x: tempX,y:tempY))            }        }    }            func drawCicle(centerPoint:CGPoint,index:Int)    {        var context = UIGraphicsGetCurrentContext();        CGContextSetLineWidth(context, 2.0);        CGContextAddArc(context, centerPoint.x, centerPoint.y, self.circleRadius, 0.0, CGFloat(M_PI * 2.0), 1)        let currentIsSelected:Bool = contains(self.selectPointIndexCollection, index)        if(currentIsSelected)        {            //96 169 252            CGContextSetStrokeColorWithColor(context, UIColor(red: 96/255.0, green: 169/255.0, blue: 252/255.0, alpha: 1).CGColor)        }else        {                        CGContextSetStrokeColorWithColor(context,  UIColor(red: 144/255.0, green: 149/255.0, blue: 173/255.0, alpha: 1).CGColor)        }        CGContextStrokePath(context);        CGContextAddArc(context, centerPoint.x, centerPoint.y, self.circleRadius, 0.0, CGFloat(M_PI * 2.0), 1)        CGContextSetFillColorWithColor(context,  UIColor(red: 35/255.0, green: 39/255.0, blue: 54/255.0, alpha: 1).CGColor)        CGContextFillPath(context)        if(currentIsSelected)        {            CGContextAddArc(context, centerPoint.x, centerPoint.y, 10, 0.0, CGFloat(M_PI * 2.0), 1)            CGContextSetFillColorWithColor(context, UIColor(red: 96/255.0, green: 169/255.0, blue: 252/255.0, alpha: 1).CGColor)            CGContextFillPath(context)        }    }        func drawNineCircle()    {        for p in 0...self.ninePointCollection.count-1        {            self.drawCicle(self.ninePointCollection[p],index:p);        }            }        override init(frame:CGRect)    {        super.init(frame:frame)        //26 29 40        self.backgroundColor = UIColor(red: 35/255.0, green: 39/255.0, blue: 54/255.0, alpha: 1)        FillNinePointCollection()    }        required init(coder aDecoder: NSCoder) {        fatalError("init(coder:) has not been implemented")    }        func DrawLine(p1:CGPoint,p2:CGPoint)    {        var bp = UIBezierPath()        bp.lineWidth  = 3        bp.lineCapStyle = kCGLineCapRound        UIColor(red: 96/255.0, green: 169/255.0, blue: 252/255.0, alpha: 1).setStroke()        bp.moveToPoint(p1)        bp.addLineToPoint(p2)        bp.stroke()            }        override func drawRect(rect: CGRect) {                if(self.selectPointIndexCollection.count > 0)        {            for index in 0...self.selectPointIndexCollection.count-1            {                let nextIndex = index+1                if(nextIndex <= self.selectPointIndexCollection.count-1)                {                    let firstPointIndex=self.selectPointIndexCollection[index]                    let secondPointIndex=self.selectPointIndexCollection[nextIndex]                    self.DrawLine(self.ninePointCollection[firstPointIndex],p2:self.ninePointCollection[secondPointIndex])                }            }            if self.fingerPoint.x != -100            {                let lastPointIndex=self.selectPointIndexCollection[self.selectPointIndexCollection.count-1]                self.DrawLine(self.ninePointCollection[lastPointIndex],p2:fingerPoint)            }                    }        self.drawNineCircle()    }            func distanceBetweenTwoPoint(p1:CGPoint,p2:CGPoint)->CGFloat    {        return pow(pow((p1.x-p2.x), 2)+pow((p1.y-p2.y), 2), 0.5)    }        func CircleIsTouchThenPushInSelectPointIndexCollection(fingerPoint:CGPoint)    {                for index in 0...self.ninePointCollection.count-1        {            if(!contains(self.selectPointIndexCollection, index))            {                if(self.distanceBetweenTwoPoint(fingerPoint,p2:self.ninePointCollection[index]) <= circleRadius)                {                    self.selectPointIndexCollection.append(index);                }            }        }            }        override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {        var t = touches.anyObject() as UITouch        self.selectPointIndexCollection.removeAll(keepCapacity: false)        self.fingerPoint = t.locationInView(self)        self.CircleIsTouchThenPushInSelectPointIndexCollection(fingerPoint);        self.setNeedsDisplay()    }        override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {        var t = touches.anyObject() as UITouch        self.fingerPoint = t.locationInView(self)                self.CircleIsTouchThenPushInSelectPointIndexCollection(self.fingerPoint);                self.setNeedsDisplay()    }        override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {        self.fingerPoint.x = -100        self.setNeedsDisplay()        if(self.selectPointIndexCollection.count>0)        {            var ReStr:String = ""            for index in 0...self.selectPointIndexCollection.count-1            {                ReStr += String(self.selectPointIndexCollection[index]) + ","            }                        let alertV = UIAlertView(title: "您的结果", message: ReStr, delegate: nil, cancelButtonTitle: "我知道了")            alertV.show()        }    }}