swift3 マップ上に画面から動かない円と線を描画したい

MKMapView上に画面の中心から動かない円と線を描きたい。
現在、MKPolylineで描くとスクロールをして場面から見えなくなってしまう。
その他のarcCircleは、扇型の領域を描き、中心部を透明にできない。地図はスクロールして、円、線はスクロールしない方法はありませんか？宜しくお願い致します。

swift
1//  ViewController.swift
2import UIKit
3import MapKit
4
5class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
6    var myMapView : MKMapView!
7    var myLocationManager : CLLocationManager!
8    var imHearBtn : UIButton!
9    // 縮尺.
10    var myLatDist : CLLocationDistance = 10
11    var myLonDist : CLLocationDistance = 10
12    let DEFAULT_DISTANCE : CLLocationDistance = 10
13
14    private var addedLayers = [CAShapeLayer]()
15    var center: CLLocationCoordinate2D!
16    var rendere = 0
17    let LINE_1 = 1
18    let CIRCLE = 3
19    
20    override func viewDidLoad() {
21        super.viewDidLoad()
22
23        let maxWidth : CGFloat = self.view.bounds.width
24        let maxHeight: CGFloat = self.view.bounds.height
25        
26        myMapView = MKMapView()
27        myMapView.frame = self.view.frame(forAlignmentRect: CGRect(x: 0.0, y: 20.0 + 50.0, width: maxWidth, height: maxHeight - 20.0 - 50.0 - 50.0))
28        myMapView.delegate = self
29        myMapView.setCenter(self.myMapView.userLocation.coordinate, animated: true)
30        myMapView.setUserTrackingMode(.none, animated: true)
31        myMapView.showsUserLocation = true
32        view.addSubview(self.myMapView)
33        
34        imHearBtn = UIButton()
35        imHearBtn.frame = CGRect(x: maxWidth / 5.0 * 1.0, y: maxHeight - 50.0, width: maxWidth / 5.0, height: 50.0)
36        imHearBtn.backgroundColor = UIColor.green
37        imHearBtn.layer.cornerRadius = 10.0
38        imHearBtn.setTitle("現在地", for: .normal)
39        imHearBtn.tag = 3
40        imHearBtn.addTarget(self, action: #selector(ViewController.onClickMyButton(sender:)), for: .touchUpInside)
41        self.view.addSubview(imHearBtn)
42        
43        myLocationManager = CLLocationManager()
44        myLocationManager.delegate = self
45        myLocationManager.distanceFilter = 100.0
46        myLocationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
47
48        myLocationManager.startUpdatingLocation()
49
50        let status = CLLocationManager.authorizationStatus()
51        
52        if(status != CLAuthorizationStatus.authorizedWhenInUse){
53            print("not determined")
54            myLocationManager.requestWhenInUseAuthorization()
55
56       }
57        
58        arcCircle(startRagian: 0.0, endRagian: 90.0, radius: 50, red: 0.0, green: 0.0, blue: 0.0, alpha: 1.0, lineWidth: 20.0)
59        arcCircle(startRagian: 0.0, endRagian: 90.0, radius: 40, red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0, lineWidth: 18.0)
60
61    }
62    
63    func arcCircle(startRagian:CGFloat, endRagian:CGFloat, radius:CGFloat, red:CGFloat, green:CGFloat, blue:CGFloat, alpha:CGFloat, lineWidth:CGFloat){
64        
65        let pi = CGFloat(Double.pi)
66        let start:CGFloat = pi / 180.0 * startRagian // 開始の角度
67        let end : CGFloat = pi / 180.0 * endRagian// 終了の角度
68        
69        let center = CGPoint(x: self.view.frame.width / 2.0, y: self.view.frame.height / 2.0 + 10)
70        let path: UIBezierPath = UIBezierPath();
71        path.move(to: center)
72        path.addArc(withCenter: CGPoint(x: self.view.frame.width/2, y:self.view.frame.height/2 + 10.0), radius: radius, startAngle: start, endAngle: end, clockwise: true) // 円弧
73        
74        let layer = CAShapeLayer()
75        layer.fillColor = UIColor(red: red, green: green, blue: blue, alpha: alpha).cgColor
76        layer.path = path.cgPath
77        layer.lineWidth = lineWidth
78        self.view.layer.addSublayer(layer)
79        
80        self.addedLayers.append(layer)
81    }
82
83    // GPSから値を取得した際に呼び出されるメソッド.
84    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
85
86        // 配列から現在座標を取得.
87        let myLocations: NSArray = locations as NSArray
88        let myLastLocation: CLLocation = myLocations.lastObject as! CLLocation
89        let myLocation:CLLocationCoordinate2D = myLastLocation.coordinate
90        
91               // Regionを作成.
92        let myRegion: MKCoordinateRegion = MKCoordinateRegionMakeWithDistance(myLocation, myLatDist, myLonDist);
93        
94        // MapViewに反映.
95        myMapView.setRegion(myRegion, animated: true)
96
97        // 直線を引く座標を作成
98        let coordinate1 = CLLocationCoordinate2D(latitude: myLocation.latitude, longitude: myLocation.longitude)
99        let coordinate2 = CLLocationCoordinate2D(latitude: myLocation.latitude, longitude: 0.0)
100        let coordinate3 = CLLocationCoordinate2D(latitude: myLocation.latitude, longitude: -180.0)
101        let coordinate4 = CLLocationCoordinate2D(latitude: 0.0,                 longitude: myLocation.longitude)
102        let coordinate5 = CLLocationCoordinate2D(latitude: 90.0,                longitude: myLocation.longitude)
103
104        // 座標を配列に格納
105        var coordinates_1 = [coordinate1, coordinate2]
106        var coordinates_2 = [coordinate1, coordinate3]
107        var coordinates_3 = [coordinate1, coordinate4]
108        var coordinates_4 = [coordinate1, coordinate5]
109
110        //polyline作成
111        let myPolyLine_1:MKPolyline = MKPolyline(coordinates: &coordinates_1, count: coordinates_1.count)
112        let myPolyLine_2:MKPolyline = MKPolyline(coordinates: &coordinates_2, count: coordinates_2.count)
113        let myPolyLine_3:MKPolyline = MKPolyline(coordinates: &coordinates_3, count: coordinates_3.count)
114        let myPolyLine_4:MKPolyline = MKPolyline(coordinates: &coordinates_4, count: coordinates_4.count)
115
116        // 円を描く
117        // 地図の中心の座標.
118        center = CLLocationCoordinate2DMake(myLocation.latitude, myLocation.longitude)
119//        var center2 : CLLocationCoordinate2D!
120//        center2 = CLLocationCoordinate2D(latitude: myLocation.latitude , longitude: myLocation.longitude)
121        
122        // 縮尺を設定.
123        let mySpan: MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: 0.02, longitudeDelta: 0.02)
124        let myRegions: MKCoordinateRegion = MKCoordinateRegion(center: center, span: mySpan)
125
126        // regionをmapViewに追加.
127        myMapView.region = myRegions
128
129        // 円を描画する(半径1000m).
130        let myCircle_1: MKCircle = MKCircle(center: center, radius: CLLocationDistance(1000))
131
132        // mapViewにlineを追加.
133
134        rendere = LINE_1
135        myMapView.add(myPolyLine_1)
136        myMapView.add(myPolyLine_2)
137        myMapView.add(myPolyLine_3)
138        myMapView.add(myPolyLine_4)
139        
140        // myMapViewにcircleを追加
141        rendere = CIRCLE
142        myMapView.add(myCircle_1)
143        myMapView.setRegion(myRegions, animated: true)
144    }
145
146    // Regionが変更された時に呼び出されるメソッド.
147    func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
148    }
149
150   
151    // addした際に呼ばれるデリゲートメソッド
152    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
153        if (rendere == LINE_1) {
154            // rendererを生成.
155            let myPolyLineRendere: MKPolylineRenderer = MKPolylineRenderer(overlay: overlay)
156       
157            // 線の太さを指定.
158            myPolyLineRendere.lineWidth = 2.0
159            
160            // 線の色を指定.
161            myPolyLineRendere.strokeColor = UIColor.red
162        
163            return myPolyLineRendere
164
165        } else { //if (rendere == CIRCLE) {
166            
167            // rendererを生成.
168            let myCircleView: MKCircleRenderer = MKCircleRenderer(overlay: overlay)
169        
170            // 円の内部を赤色で塗りつぶす.
171//            myCircleView.fillColor = UIColor(red: 0.0, green:1.0, blue: 1.0, alpha: 0.3)
172        
173            // 円周の線の色を黒色に設定.
174            myCircleView.strokeColor = UIColor.darkGray
175        
176            // 円を透過させる.
177            myCircleView.alpha = 1.0
178        
179            // 円周の線の太さ.
180            myCircleView.lineWidth = 2.0
181            
182            return myCircleView
183        }
184    }
185    
186    func removeAllSubviews(parentView: UIView){
187        let subviews = parentView.subviews
188        for subview in subviews {
189            subview.removeFromSuperview()
190        }
191    }
192    
193    func onClickMyButton(sender: UIButton) {
194        
195        if (sender.tag == 3){
196
197            myLatDist = CLLocationDistance(DEFAULT_DISTANCE)
198            myLonDist = CLLocationDistance(DEFAULT_DISTANCE)
199            var cr:MKCoordinateRegion = myMapView.region
200            cr.span.latitudeDelta = cr.center.latitude
201            cr.span.longitudeDelta = cr.center.longitude
202            let myCoordinate: CLLocationCoordinate2D = CLLocationCoordinate2DMake(cr.span.latitudeDelta, cr.span.longitudeDelta)
203            let myRegion: MKCoordinateRegion = MKCoordinateRegionMakeWithDistance(myCoordinate, CLLocationDistance(myLatDist), CLLocationDistance(myLonDist))
204            myMapView.setRegion(myRegion, animated: true)
205            
206            myMapView.userTrackingMode = MKUserTrackingMode.follow
207            myMapView.userTrackingMode = MKUserTrackingMode.none
208            myMapView.setCenter(myMapView.userLocation.coordinate, animated: true)
209            
210            removeAllSubviews(parentView: myMapView)
211            
212            self.addedLayers.forEach {
213                $0.removeFromSuperlayer()
214            }
215            viewDidLoad()
216        }
217    }
218
219    override func didReceiveMemoryWarning() {
220        super.didReceiveMemoryWarning()
221        // Dispose of any resources that can be recreated.
222    }
223}