Thread 1: Exception: "[<UIViewController 0x7fe17ac0bb90> setValue:forUndefinedKey:]の直し方

開発環境
macOs catalina
xcode11.5

appdelegate.swiftに出るエラーが直せないです。

swift
1
2import UIKit
3import MapKit
4 
5class MapViewController: UIViewController {
6    
7    @IBOutlet weak var mapView: MKMapView!
8    
9    //座標の配列
10    let coordinatesArray = [
11        ["name":"東京駅",    "lat":35.68124,  "lon": 139.76672],
12        ["name":"皇居外苑",   "lat":35.68026,  "lon": 139.75801],
13        ["name":"国立劇場",   "lat":35.6818,   "lon": 139.74326],
14        ["name":"九段下駅",   "lat":35.69555,  "lon": 139.75074]
15    ]
16 
17    override func viewDidLoad() {
18        super.viewDidLoad()
19        self.mapView.delegate = self
20        makeMap()
21    }
22    
23    func makeMap(){
24        //マップの表示域を設定
25        let coordinate = CLLocationCoordinate2DMake(coordinatesArray[0]["lat"] as! CLLocationDegrees, coordinatesArray[0]["lon"] as! CLLocationDegrees)
26        let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
27        let region = MKCoordinateRegion(center: coordinate, span: span)
28        self.mapView.setRegion(region, animated: true)
29        
30        
31        var routeCoordinates: [CLLocationCoordinate2D] = []
32        for i in 0..<coordinatesArray.count {
33            let annotation = MKPointAnnotation()
34            let annotationCoordinate = CLLocationCoordinate2DMake(coordinatesArray[i]["lat"] as! CLLocationDegrees, coordinatesArray[i]["lon"] as! CLLocationDegrees)
35            annotation.title = coordinatesArray[i]["name"] as? String //ピンの吹き出しに名前が出るように
36            annotation.coordinate = annotationCoordinate
37            routeCoordinates.append(annotationCoordinate)
38            self.mapView.addAnnotation(annotation)
39        }
40        var myRoute: MKRoute!
41        let directionsRequest = MKDirections.Request()
42        var placemarks = [MKMapItem]()
43        //routeCoordinatesの配列からMKMapItemの配列にに変換
44        for item in routeCoordinates{
45            let placemark = MKPlacemark(coordinate: item, addressDictionary: nil)
46            placemarks.append(MKMapItem(placemark: placemark))
47        }
48        directionsRequest.transportType = .walking //移動手段は徒歩
49        for (k, item) in placemarks.enumerated(){
50            if k < (placemarks.count - 1){
51                directionsRequest.source = item //スタート地点
52                directionsRequest.destination = placemarks[k + 1] //目標地点
53                let direction = MKDirections(request: directionsRequest)
54                direction.calculate(completionHandler: {(response, error) in
55                    if error == nil {
56                        myRoute = response?.routes[0]
57                        self.mapView.addOverlay(myRoute.polyline, level: .aboveRoads) //mapViewに絵画
58                    }
59                })
60            }
61        }
62    }
63}
64 
65extension MapViewController:MKMapViewDelegate {
66 
67    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
68        if annotation is MKUserLocation {
69            return nil
70        }
71        let reuseId = "pin"
72        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId)
73        if pinView == nil {
74            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
75            pinView?.canShowCallout = true //吹き出しで情報を表示出来るように
76        }else{
77            pinView?.annotation = annotation
78        }
79        return pinView
80    }
81    
82    //ピンを繋げている線の幅や色を調整
83    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
84        let route: MKPolyline = overlay as! MKPolyline
85        let routeRenderer = MKPolylineRenderer(polyline: route)
86        routeRenderer.strokeColor = UIColor(red:1.00, green:0.35, blue:0.30, alpha:1.0)
87        routeRenderer.lineWidth = 3.0
88        return routeRenderer
89    }
90    
91}
92

appdelegate.swiftのエラー

Thread 1: Exception: "[<UIViewController 0x7fe17ac0bb90> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key mapView."

デバッグエリアのエラー

2020-06-09 20:32:20.840216+0900 swiftmapp[1468:48890] [Storyboard] Unknown class _TtC9swiftmapp14ViewController in Interface Builder file.
2020-06-09 20:32:21.180363+0900 swiftmapp[1468:48890] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x7fe17ac0bb90> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key mapView.'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff23e3cf0e __exceptionPreprocess + 350
	1   libobjc.A.dylib                     0x00007fff50ba89b2 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff23e3cad9 -[NSException raise] + 9
	3   Foundation                          0x00007fff258e1bd6 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 325
	4   UIKitCore                           0x00007fff485d8412 -[UIViewController setValue:forKey:] + 87
	5   UIKitCore                           0x00007fff488e572f -[UIRuntimeOutletConnection connect] + 109
	6   CoreFoundation                      0x00007fff23e29222 -[NSArray makeObjectsPerformSelector:] + 242
	7   UIKitCore                           0x00007fff488e2918 -[UINib instantiateWithOwner:options:] + 2192
	8   UIKitCore                           0x00007fff485df81a -[UIViewController _loadViewFromNibNamed:bundle:] + 379
	9   UIKitCore                           0x00007fff485e0351 -[UIViewController loadView] + 177
	10  UIKitCore                           0x00007fff485e0650 -[UIViewController loadViewIfRequired] + 172
	11  UIKitCore                           0x00007fff485e0dfd -[UIViewController view] + 27
	12  UIKitCore                           0x00007fff48cc435d -[UIWindow addRootViewControllerViewIfPossible] + 326
	13  UIKitCore                           0x00007fff48cc3986 -[UIWindow _updateLayerOrderingAndSetLayerHidden:actionBlock:] + 219
	14  UIKitCore                           0x00007fff48cc4a11 -[UIWindow _setHidden:forced:] + 362
	15  UIKitCore                           0x00007fff48cd7e4d -[UIWindow _mainQueue_makeKeyAndVisible] + 42
	16  UIKitCore                           0x00007fff48ef9d63 -[UIWindowScene _makeKeyAndVisibleIfNeeded] + 202
	17  UIKitCore                           0x00007fff481e7d60 +[UIScene _sceneForFBSScene:create:withSession:connectionOptions:] + 1405
	18  UIKitCore                           0x00007fff48c87d2d -[UIApplication _connectUISceneFromFBSScene:transitionContext:] + 1019
	19  UIKitCore                           0x00007fff48c88064 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 291
	20  UIKitCore                           0x00007fff487da8dc -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
	21  FrontBoardServices                  0x00007fff36cacd2e -[FBSSceneImpl _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 419
	22  FrontBoardServices                  0x00007fff36cd2dc1 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke.154 + 102
	23  FrontBoardServices                  0x00007fff36cb7757 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 220
	24  FrontBoardServices                  0x00007fff36cd2a52 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke + 355
	25  libdispatch.dylib                   0x0000000105cd1e8e _dispatch_client_callout + 8
	26  libdispatch.dylib                   0x0000000105cd4da2 _dispatch_block_invoke_direct + 300
	27  FrontBoardServices                  0x00007fff36cf86e9 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
	28  FrontBoardServices                  0x00007fff36cf83d7 -[FBSSerialQueue _queue_performNextIfPossible] + 441
	29  FrontBoardServices                  0x00007fff36cf88e6 -[FBSSerialQueue _performNextFromRunLoopSource] + 22
	30  CoreFoundation                      0x00007fff23da0d31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
	31  CoreFoundation                      0x00007fff23da0c5c __CFRunLoopDoSource0 + 76
	32  CoreFoundation                      0x00007fff23da048c __CFRunLoopDoSources0 + 268
	33  CoreFoundation                      0x00007fff23d9b02e __CFRunLoopRun + 974
	34  CoreFoundation                      0x00007fff23d9a944 CFRunLoopRunSpecific + 404
	35  GraphicsServices                    0x00007fff38ba6c1a GSEventRunModal + 139
	36  UIKitCore                           0x00007fff48c8b9ec UIApplicationMain + 1605
	37  swiftmapp                           0x0000000105a5451b main + 75
	38  libdyld.dylib                       0x00007fff51a231fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) ```