mapkit

问题 It looks like I'm running into an issue where I can reliably cause my MKMapView to crash if I'm adding annotations while the map's visible region is being changed. I've boiled the code that is causing it down to a pretty simple implementation, and I'm reproducing it here: NSMutableArray *pointAnnotationArray = [[NSMutableArray alloc] init]; MKCoordinateRegion coordRegion = [mapViewOutlet region]; float randMax = 0.1; for (int i = 0; i < 100; i++){ float randomDeviation1 = (((float)

问题 I think I've found a bug in MapKit when using satelliteFlyover and hybridFlyover MapTypes to display large paths across the globe. If you display both MKPolylines and MKCircles on the same map, as you zoom in you will see large sections of the overlays disappear. I've seen the same basic bug since at least iOS 10. This sample code is for SwiftUI in iOS 13 with Xcode 11+. To duplicate this problem, just create a new SwiftUI project for iOS and copy all of this code into ContentView.swift. It

问题 I'm trying to learn Combine with SwiftUI and I'm struggling how to update my view (from UIKit) with ObservableObject (previously BindableObject ). The issue is that, obviously, method updateUIView will not fire once the @Published object sends the notification it was changed. class DataSource: ObservableObject { @Published var locationCoordinates = [CLLocationCoordinate2D]() var value: Int = 0 init() { Timer.scheduledTimer(withTimeInterval: 3, repeats: true) { timer in self.value += 1 self

问题 I would like to draw some Geodesic Polyline(great circle line) between points on Earth using Satellite Flyover map type. // in viewDidLoad() mapView.mapType = .satelliteFlyover let geodesic = MKGeodesicPolyline(coordinates: [route.airport1, route.airport2], count: 2) self.mapView.addOverlay(geodesic) // rendering method func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer { guard let polyline = overlay as? MKPolyline else { print("else??") return

问题 I have a view controller with map kit integrated. I need to shoot an alert before opening that map, asking to choose from all similar applications of maps to open it with. For instance, if google maps app is installed in my iPhone, there should be an option for it, along with the default mapkit view. Is there a possibility to achieve this functionality which scans every similar app from iphone and returns the result as options to open map with. 回答1: You can create an array of checks to map

问题 I have a view controller with map kit integrated. I need to shoot an alert before opening that map, asking to choose from all similar applications of maps to open it with. For instance, if google maps app is installed in my iPhone, there should be an option for it, along with the default mapkit view. Is there a possibility to achieve this functionality which scans every similar app from iphone and returns the result as options to open map with. 回答1: You can create an array of checks to map

问题 I have a view controller with map kit integrated. I need to shoot an alert before opening that map, asking to choose from all similar applications of maps to open it with. For instance, if google maps app is installed in my iPhone, there should be an option for it, along with the default mapkit view. Is there a possibility to achieve this functionality which scans every similar app from iphone and returns the result as options to open map with. 回答1: You can create an array of checks to map

问题 I am trying to add multiple poly lines onto a map using mkmapkit. These poly lines indicate walking zones in my area. The problem is that my code is too bulky for a large amount of walking zones. At the moment my code only indicates 2 walking routes but for instance if I want to add 100 or 1000 walking routes the code would be massive. I'm sure there is a way I could stream line this code so I could add in multiple walking zones with a lot less code but in not too sure the best way to go

问题 I created seven different polylines. However some of them are disappearing when I zoom in closely. Why it is happening? How can I prevent this? Here is my polyline renderer: func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer { let renderer = MKPolylineRenderer(polyline: overlay as! MKPolyline) renderer.strokeColor = UIColor(red: 1, green: 1, blue: 1, alpha: 0.9) renderer.lineWidth = 2.2 return renderer } //Thousands of parameters sending as a parameter

问题 I'm using iOS 11 new APIs and I have been successful in making cluster appear. Now, I'm trying to change cluster image providing a custom image. Since I created this custom annotation view: class PlaceView: MKAnnotationView { override var annotation: MKAnnotation? { willSet { guard let place = newValue as? Place else {return} clusteringIdentifier = Place.type image = place.image } } I tried to add this line inside willSet block: cluster?.image = UIImage(named: "Cluster") but it didn't work.