由于MKPointAnnotation上无法识别的选择器而导致崩溃

Question

我已经完成了MKMapView的聚类。

class BaseMKPointAnnotation: MKPointAnnotation {
    var index: Int!
}

class ClusteredAnnotationView: MKMarkerAnnotationView {

    override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
        super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
        // Enable clustering by just setting the clusteringIdentifier
        clusteringIdentifier = "AnnotationView"
        // clusteringIdentifier = nil
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func prepareForDisplay() {
        super.prepareForDisplay()
        displayPriority = .defaultHigh
        glyphImage = Images.annotationIcon
    }
}

extension MKMapView {
    func animateToPoint(_ coordinate: CLLocationCoordinate2D, animated: Bool) {
        let coordinateRegion = MKCoordinateRegion(center: coordinate, latitudinalMeters: 250.0, longitudinalMeters: 250.0)
        self.setRegion(coordinateRegion, animated: animated)
    }
}

所以我有我的ViewController。当集合视图调用mapViewAnimateTo时崩溃。虽然它不会经常崩溃，但确实会崩溃。

class ViewController: UIViewController {

    // Method that will add annotations to the mapView.
    private func addAnnotation(_ i: Int, _ coordinate: CLLocationCoordinate2D) {
        let annotation = BaseMKPointAnnotation()
        annotation.index = i // Index to differentiate the annotation.
        annotation.coordinate = coordinate
        mapView.addAnnotation(annotation)
    }

    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        if annotation is MKUserLocation {
            return nil
        }
        var annotationView = self.mapView.dequeueReusableAnnotationView(withIdentifier: "Pin")

        if annotationView == nil {
            annotationView = ClusteredAnnotationView(annotation: annotation, reuseIdentifier: "Pin")
        } else {
            annotationView?.annotation = annotation
        }
        return annotationView
    }

    // This method is called when horizontal collection view stops scrolling.
    func mapViewAnimateTo(_ index: Int) {

        // Gets the array of points
        let point = presenter.getCollectedPoints(index).coordinates

        // coordinate to animate.
        let coordinate = CLLocationCoordinate2D(latitude: point[0].latitude, longitude: point[0].longitude)

        // animates to the coordinate
        /*********** Sometimes it crashes here. ***********/
        mapView.animateToPoint(coordinate, animated: true)

        for annotation in mapView.annotations {
            if annotation.coordinate.latitude == coordinate.latitude && annotation.coordinate.longitude == coordinate.longitude {
                // mark the annotation as selected.
                /*********** Sometimes it crashes here. ***********/
                mapView.selectAnnotation(annotation, animated: true)
            }
        }
    }
}

它崩溃了下面的报告，我该如何解决这个崩溃。在这里，我附上了撞车的图像

2019-04-17 16:17:21.033478+0530 Demo App[13618:213851] -[Demo_App.BaseMKPointAnnotation memberAnnotations]: unrecognized selector sent to instance 0x6000007e2da0
2019-04-17 16:17:21.042907+0530 Demo App[13618:213851] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Demo_App.BaseMKPointAnnotation memberAnnotations]: unrecognized selector sent to instance 0x6000007e2da0'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000115c0a6fb __exceptionPreprocess + 331
    1   libobjc.A.dylib                     0x00000001151aeac5 objc_exception_throw + 48
    2   CoreFoundation                      0x0000000115c28ab4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
    3   CoreFoundation                      0x0000000115c0f443 ___forwarding___ + 1443
    4   CoreFoundation                      0x0000000115c11238 _CF_forwarding_prep_0 + 120
    5   MapKit                              0x0000000116577298 -[MKMapView annotationContainer:requestAddingClusterForAnnotationViews:] + 168
    6   MapKit                              0x0000000116703e7c -[MKAnnotationContainerView _updateClusterableAnnotationViews:withID:] + 461
    7   CoreFoundation                      0x0000000115c7a9c2 -[__NSDictionaryM enumerateKeysAndObjectsWithOptions:usingBlock:] + 226
    8   MapKit                              0x00000001166ff3fc -[MKAnnotationContainerView updateAnnotationViewsForReason:] + 282
    9   MapKit                              0x0000000116702cbc -[MKAnnotationContainerView finishAddingAnnotationViews] + 29
    10  MapKit                              0x000000011657f59f -[MKMapView annotationManager:didAddAnnotationRepresentations:] + 53
    11  MapKit                              0x000000011663d24e -[MKAnnotationManager updateVisibleAnnotations] + 1660
    12  MapKit                              0x000000011656e238 -[MKMapView _didChangeRegionMidstream:] + 208
    13  MapKit                              0x00000001165734a2 -[MKMapView mapLayer:didChangeRegionAnimated:] + 67
    14  VectorKit                           0x000000012f00ae54 -[VKMapView map:didChangeRegionAnimated:] + 122
    15  VectorKit                           0x000000012f089f6b __86-[VKMapCameraController _animateToPosition:pitch:yaw:duration:timingCurve:completion:]_block_invoke.227 + 75
    16  VectorKit                           0x000000012f042747 -[VKAnimation stopAnimation:] + 106
    17  VectorKit                           0x000000012f042b4c -[VKTimedAnimation stopAnimation:] + 44
    18  VectorKit                           0x000000012f042c2e -[VKTimedAnimation onTimerFired:] + 47
    19  VectorKit                           0x000000012efb0b24 _ZN2md16AnimationManager12onTimerFiredEd + 208
    20  VectorKit                           0x000000012efb1b60 _ZN2md27InteractiveAnimationManager12onTimerFiredEd + 14
    21  VectorKit                           0x000000012f26246c _ZN2md9MapEngine11layoutSceneEdb + 96
    22  VectorKit                           0x000000012f2623f6 -[_MapEngineRenderQueueSource renderQueueForTimestamp:] + 27
    23  VectorKit                           0x000000012f3212e7 -[MDDisplayLayer drawToTexture:withTimestamp:completionHandler:prepareHandler:] + 139
    24  VectorKit                           0x000000012f46224f __33-[GGLOpenGLESLayer onTimerFired:]_block_invoke + 87
    25  VectorKit                           0x000000012f469049 _ZN3ggl10OESContext17performWhileBoundEU13block_pointerFvvE + 163
    26  VectorKit                           0x000000012f462009 -[GGLOpenGLESLayer onTimerFired:] + 106
    27  VectorKit                           0x000000012f2642d3 _ZN2md9MapEngine11renderSceneEdNSt3__18functionIFvvEEE + 93
    28  VectorKit                           0x000000012f263f34 _ZN2md9MapEngine18onRenderTimerFiredEd + 188
    29  VectorKit                           0x000000012f464c4c _ZN3ggl11DisplayLink12onTimerFiredEd + 32
    30  VectorKit                           0x000000012f464b1b -[_GGLDisplayLinkTarget displayLinkFired:] + 81
    31  QuartzCore                          0x0000000112339d97 _ZN2CA7Display11DisplayLink14dispatch_itemsEyyy + 663
    32  QuartzCore                          0x00000001124084a2 _ZL22display_timer_callbackP12__CFMachPortPvlS1_ + 297
    33  CoreFoundation                      0x0000000115b46096 __CFMachPortPerform + 150
    34  CoreFoundation                      0x0000000115b72419 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
    35  CoreFoundation                      0x0000000115b71a7b __CFRunLoopDoSource1 + 459
    36  CoreFoundation                      0x0000000115b6c00a __CFRunLoopRun + 2490
    37  CoreFoundation                      0x0000000115b6b302 CFRunLoopRunSpecific + 626
    38  GraphicsServices                    0x00000001197dc2fe GSEventRunModal + 65
    39  UIKitCore                           0x0000000120226ba2 UIApplicationMain + 140
    40  TOSCollect Live                     0x000000010f16200b main + 75
    41  libdyld.dylib                       0x0000000117743541 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

当我选择在地图上看不到的注释时，问题就出现了。我很杂乱。

我通过首先缩放到该位置，然后将注释属性设置为选中来解决了该问题。

所以我更新了mapViewAnimateTo方法。

func mapViewAnimateTo(_ index: Int) {
    print("MapView scrolling to index \(index)")
    let point = presenter.getCollectedPoints(index).coordinates
    let coordinate = CLLocationCoordinate2D(latitude: point[0].latitude, longitude: point[0].longitude)

    CATransaction.begin()
    CATransaction.setCompletionBlock({
        // 2. Upon completion of zooming, marks the first annotation found at respective coordinate as selected.
        if let annotation = self.mapView.annotations.filter ({ $0.coordinate.latitude == coordinate.latitude && $0.coordinate.longitude == coordinate.longitude }).first {
            self.mapView.selectAnnotation(annotation, animated: true)
        }
    })
    // 1. Zooms to the respective coordinate.
    mapView.animateToPoint(coordinate, animated: true)
    CATransaction.commit()
}

甚至将该地区的距离更新为10米。

extension MKMapView {
    func animateToPoint(_ coordinate: CLLocationCoordinate2D, animated: Bool) {
        let coordinateRegion = MKCoordinateRegion(center: coordinate, latitudinalMeters: 10, longitudinalMeters: 10)
        self.setRegion(coordinateRegion, animated: animated)
    }
}