Display map or satellite imagery from your app's interface, call out points of interest, and determine placemark information for map coordinates using MapKit.

Posts under MapKit tag

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MapProxy conversion from screen to coords is wrong on macOS
Try the following code on macOS, and you'll see the marker is added in the wrong place, as the conversion from screen coordinates to map coordinates doesn't work correctly. The screenCoord value is correct, but reader.convert(screenCoord, from: .local) offsets the resulting coordinate by the height of the content above the map, despite the .local parameter. struct TestMapView: View { @State var placeAPin = false @State var pinLocation :CLLocationCoordinate2D? = nil @State private var cameraProsition: MapCameraPosition = .camera( MapCamera( centerCoordinate: .denver, distance: 3729, heading: 92, pitch: 70 ) ) var body: some View { VStack { Text("This is a bug demo.") Text("If there are other views above the map, the MapProxy doesn't convert the coordinates correctly.") MapReader { reader in Map( position: $cameraProsition, interactionModes: .all ) { if let pl = pinLocation { Marker("(\(pl.latitude), \(pl.longitude))", coordinate: pl) } } .onTapGesture(perform: { screenCoord in pinLocation = reader.convert(screenCoord, from: .local) placeAPin = false if let pinLocation { print("tap: screen \(screenCoord), location \(pinLocation)") } }) .mapControls{ MapCompass() MapScaleView() MapPitchToggle() } .mapStyle(.standard(elevation: .automatic)) } } } } extension CLLocationCoordinate2D { static var denver = CLLocationCoordinate2D(latitude: 39.742043, longitude: -104.991531) } (FB13135770)
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1.3k
Dec ’24
MapKit elevation information for a route
Hello all, I am playing with MapKit for SwiftUI, so far so good. There is one thing I have not seen any documentations, or sample codes around and that's elevation data, e.g. My questions are: Is there a way to get this information from an MKRoute? Is it possible to get the elevation gain/drop at a given point in the route? Many thank in advance for your help.
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661
Oct ’24
MapKit in List Breaks Top/Bottom Bar FadeIn/Out Effect
I've encountered a weird issue with the new Map for iOS 17. In my list, which includes a MapView among other elements, I've observed that with the new initializer, the top and bottom bars are persistently displayed. They don't hide and only appear when scrolling, as they should. This problem doesn't occur with the old, now-deprecated initializer. To illustrate this, I have two screenshots: one with the map enabled and the other with the map disabled, demonstrating the issue. Here is also my new Map code: struct MapListRowView: View { @Binding internal var location: LocationModel @State internal var user: Bool = true private var position: CLLocationCoordinate2D { .init(latitude: location.latitude, longitude: location.longitude) } private var isPad: Bool { UIDevice.current.userInterfaceIdiom == .pad ? true : false } var body: some View { Map(bounds: .init(minimumDistance: 1250)) { if user { UserAnnotation() } Annotation("", coordinate: position) { ZStack { Circle().fill().foregroundColor(.white).padding(1) Image(systemName: "mappin.circle.fill") .resizable() .foregroundColor(.indigo) }.frame(width: 20, height: 20).opacity(user ? .zero : 1.0) } } .frame(height: isPad ? 200 : 100) .cornerRadius(8) .listRowInsets(.init(top: -5, leading: .zero, bottom: -5, trailing: .zero)) .padding(.vertical, 5) .disabled(true) } }
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681
Dec ’24
SwiftUI creating MapCameraPosition from CLLocationManager initialiser/self error when trying to tie them? (see code)
Trying to use new Swift @Observable to monitor GPS position within SwiftUI content view. But how do I tie the latest locations to the SwiftUI Map's mapCameraPosition? Well ideally the answer could cover: How to fix this error - So get map tracking along with the User Position, but also How to include facility to turn on/off the map moving to track the user position (which I'll need to do next). So could be tracking, then disable, move map around and have a look at things, then click button to start syncing the mapcameraposition to the GPS location again Refer to error I'm embedded in the code below. import SwiftUI import MapKit @Observable final class NewLocationManager : NSObject, CLLocationManagerDelegate { var location: CLLocation? = nil private let locationManager = CLLocationManager() func startCurrentLocationUpdates() async throws { if locationManager.authorizationStatus == .notDetermined { locationManager.requestWhenInUseAuthorization() } for try await locationUpdate in CLLocationUpdate.liveUpdates() { guard let location = locationUpdate.location else { return } self.location = location } } } struct ContentView: View { var newlocationManager = NewLocationManager() @State private var cameraPosition: MapCameraPosition = .region(MKCoordinateRegion( center: newlocationManager.location?.coordinate ?? <#default value#>, span: MKCoordinateSpan(latitudeDelta: 0.25, longitudeDelta: 0.25) )) // GET ERROR: Cannot use instance member 'newlocationManager' within property initializer; property initializers run before 'self' is available var body: some View { ZStack { Map(position: $cameraPosition) Text("New location manager: \(newlocationManager.location?.description ?? "NIL" )") // works } .task { try? await newlocationManager.startCurrentLocationUpdates() } } } #Preview { ContentView() }
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1.5k
Dec ’24
Multi Polygons MapKit
Is MultiPolygon overlay support going to be integrated with SwiftUI? I have made a post on here previously without a reply :( Any suggestions on how to display multi-polygons within MapKit for SwiftUI(https://developer.apple.com/documentation/mapkit/mappolygon)? At the moment it is not supported and only supported by MapKit for UIKit(https://developer.apple.com/documentation/mapkit/mkmultipolygon).
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1.2k
Nov ’24
Swift 6 Concurrency Errors with MKLocalSearchCompleterDelegate results
Has anyone found a thread-safe pattern that can extract results from completerDidUpdateResults(MKLocalSearchCompleter) in the MKLocalSearchCompleterDelegate ? I've downloaded the code sample from Interacting with nearby points of interest and notice the conformance throws multiple errors in Xcode 16 Beta 5 with Swift 6: extension SearchDataSource: MKLocalSearchCompleterDelegate { nonisolated func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) { Task { let suggestedCompletions = completer.results await resultStreamContinuation?.yield(suggestedCompletions) } } Error: Task-isolated value of type '() async -> ()' passed as a strongly transferred parameter; later accesses could race and Error: Sending 'suggestedCompletions' risks causing data races Is there another technique I can use to share state of suggestedCompletions outside of the delegate in the code sample?
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2.1k
Dec ’24
Map Annotations not always receiving tap events on iOS 18.0
My app uses the SwiftUI Map control to display annotations. When annotations contain buttons AND the map has an .onTapGesture modifier, annotation button taps aren’t always recognized. Given the following ContentView, run it on an iOS device or simulator. Tap the buttons. Since iOS 18.0, some of the buttons won't respond to tap. I've also tried using the onTapGesture instead of a button, and that shows the same issue. This was not a problem under iOS 17.x: it has only shown up for my users since updating to iOS 18. Additionally, this issue does not occur when running on either macOS 15.0 or visionOS 2.0 when running in "designed for iPad" mode. Note that there was previously a tap issue on VisionOS 1.x (designed for iPad), where no tap gestures were received by annotations. I'm curious if this issue could be related. I have filed a report in Feedback Assistant (FB15273909). struct ContentView: View { private let center = CLLocationCoordinate2D(latitude: 37.77925, longitude: -122.41924) @State private var label: String = "tap a button" @State private var locations: [Location] = [] var body: some View { Map { ForEach(locations) { location in Annotation(location.name, coordinate: location.coordinate) { Button(location.name) { print("\(location.name) tapped") label = "\(location.name) tapped" } .buttonStyle(.borderedProminent) } .annotationTitles(.hidden) } } .onTapGesture { point in print("Map tapped") label = "map tapped" } .safeAreaInset(edge: .top) { Text(label) .padding() .background(.thinMaterial) .clipShape(.rect(cornerRadius: 10)) } .navigationTitle("Test Page") .navigationBarTitleDisplayMode(.inline) .task { for index in 1...16 { locations.append(Location(name: "location \(index)", coordinate: CLLocationCoordinate2D(latitude: center.latitude + Double.random(in: -0.02...0.02), longitude: center.longitude + Double.random(in: -0.02...0.02)))) } } } private struct Location: Identifiable { let id: UUID = UUID() let name: String let coordinate: CLLocationCoordinate2D } } #Preview { ContentView() }
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862
Feb ’25
Quick Look Extension does not load MapKit map properly anymore, after macOS Sequoia
It appears that starting with macOS Sequoia, Quick Look Preview extension no longer loads MapKit maps correctly anymore. Map tiles do not appear, leaving users with a beige background. Users report that polylines do render correctly, but annotations appears black. This was previously working fine in prior macOS versions including Sonoma. STEPS TO REPRODUCE Create a macOS app project, with an associated document. Ensure project has a Quick Look preview extension, with necessary basic setups. Ensure that the extension mentioned in (2) must have a MKMapView. Any other cosmetic changes, etc, does not need to be implemented to observe the base issue. Do note that it has been reported that in addition to the map tiles not loading, annotations don't render correctly as well.
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822
Aug ’25
Intermittent MKLocalSearch.Request Failures with Amap Data Source
My app has been using MKLocalSearch.Request for keyword-based location searches, and it has worked smoothly for a long time. However, starting last Wednesday, I began receiving an error from MKLocalSearch.start: MKErrorDomain (error code 4). This issue only occurs when the network environment is based in mainland China (where the API uses the Amap data source). When the network switches to other regions and other Apple Maps data source is used, the error does not occur. Another complication is that the API doesn't always fail—certain keywords still work (for example, "Huawei"). Already filed a ticket in Feedback Assistant: https://feedbackassistant.apple.com/feedback/15544549
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468
Oct ’24
using mapkit keep getting error message is it a bug?
I keep getting these messages every time the location of the user updates on the map. Although I doublechecked throughout my code and and I am not doing it within the view??? messages I receive: Publishing changes from within view updates is not allowed, this will cause undefined behavior. Publishing changes from within view updates is not allowed, this will cause undefined behavior. Publishing changes from within view updates is not allowed, this will cause undefined behavior. Publishing changes from within view updates is not allowed, this will cause undefined behavior. Publishing changes from within view updates is not allowed, this will cause undefined behavior. Publishing changes from within view updates is not allowed, this will cause undefined behavior
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Oct ’24
how to show subway exit in the mapkit mapview
mapView.showsTraffic=true mapView.showsScale=true mapView.showsCompass=true mapView.showsUserLocation=true mapView.showsBuildings=true mapView.showsLargeContentViewer=true hi,guy,please help to see this problem,thankyou,the mapkit api support some showsfunction,but I can not find how to show the exit of subway in my own app,but the map app of appple shows the exit of the subway,so how can I show the exit of the subway stations by using mapkit
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407
Oct ’24
Apple maps trail / local path only becomes visible on very close zoom
I'm using apple maps to build a feature so users can create and save running/cycling/hiking routes. Currently the map only shows trails and similar local paths after zooming in to what is basically an extreme level. I want the trails and local paths to be more visible on a further, broader level of zoom. APPLE MAPS JS EX: https://trkbucket.s3.amazonaws.com/media/shoe_images/Screenshot_2024-10-23_at_10.52.17AM.png https://trkbucket.s3.amazonaws.com/media/shoe_images/Screenshot_2024-10-23_at_10.52.04AM.png APPLE MAPS iOS EX: https://trkbucket.s3.amazonaws.com/media/shoe_images/IMG_9DDF5C9A320D-1.jpeg Also strange that on iOS the path is visible while more zoomed out whereas JS does not. Please advise how to show these map items at a broader zoom.
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586
Oct ’24
SwiftUI MapKit Map - Selecting Points of Interest
Is it possible to let the user select points of interest on the Map, such as restaurants, grocery stores, gas stations etc. I want the user to be able to select these points of interest that are already on the map, not those that I add to the map. Is this possible with the SwiftUI version of the MapKit Map?
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1.3k
Nov ’24
Apple Map Snapshot API broken??
I have been using the following python library to generate apple map snapshots. has worked fine until about ~12 hours ago - now all I'm getting is "bad request" for any snapshot with overlays. if it's just a snapshot with a defined center and no polyline overlays, it still works. perhaps something has changed with the api's way of parsing percent encoded parameters? it's super irritating that there's no changelog or source code to view. what the heck??? https://pypi.org/project/mapsnap/
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569
Oct ’24
MapKit polygon render bug when single-vertex self-intersection
We have to draw polygons inside a MKMapView based on coordinates retrieved from external source. It seems that MapKit does not behave correctly where polygons have single-vertex self-intersection. Here it's a simple point list example (every element is a pair of latitude and longitude values): [(0, 0), (20, 0), (10, 10), (20, 20), (0, 20), (10, 10), (0, 0)] The next image shows the rendering issue. But if the list is slightly changed in this way [(0, 0), (20, 0), (10, 10), (20, 20), (0, 20), (15, 10), (0, 0)] the issue disappears. The next image shows it. So it's not a self-intersection and self-tangency problem, but we think single-vertex self-intersection is a buggy edge case for MapKit. Right now we fixed this problem by finding the duplicated coordinates and applying a small offset (1e-8) to one of them, but it's a temporary solution and adds rendering delay. The problem is not due to iOS versions, since iOS 17 and 18 have the same issue. Also it happens on simulators and real devices. Here is the playground example, based mostly on the "Map Playground" template Xcode offers. If you run it without modifying it, the playground shows the "bugged" polygon. If you use notBugPoints instead of the default bugPoints for the polygon, the playground shows the "not-bugged" polygon. import MapKit import PlaygroundSupport // Create an MKMapViewDelegate to provide a renderer for our overlay class MapViewDelegate: NSObject, MKMapViewDelegate { func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer { if let overlay = overlay as? MKPolygon { let polygonRenderer = MKPolygonRenderer(overlay: overlay) polygonRenderer.fillColor = .red return polygonRenderer } return MKOverlayRenderer(overlay: overlay) } } // Create a strong reference to a delegate let delegate = MapViewDelegate() // Create an MKMapView let mapView = MKMapView(frame: CGRect(x: 0, y: 0, width: 800, height: 800)) mapView.delegate = delegate // Configure The Map elevation and emphasis style let configuration = MKStandardMapConfiguration(elevationStyle: .realistic, emphasisStyle: .default) mapView.preferredConfiguration = configuration // Create an overlay let bugPoints = [ MKMapPoint(CLLocationCoordinate2DMake(0, 0)), MKMapPoint(CLLocationCoordinate2DMake(20, 0)), MKMapPoint(CLLocationCoordinate2DMake(10, 10)), MKMapPoint(CLLocationCoordinate2DMake(20, 20)), MKMapPoint(CLLocationCoordinate2DMake(0, 20)), MKMapPoint(CLLocationCoordinate2DMake(10, 10)), MKMapPoint(CLLocationCoordinate2DMake(0, 0)) ] let notBugPoints = [ MKMapPoint(CLLocationCoordinate2DMake(0, 0)), MKMapPoint(CLLocationCoordinate2DMake(20, 0)), MKMapPoint(CLLocationCoordinate2DMake(10, 10)), MKMapPoint(CLLocationCoordinate2DMake(20, 20)), MKMapPoint(CLLocationCoordinate2DMake(0, 20)), MKMapPoint(CLLocationCoordinate2DMake(15, 10)), MKMapPoint(CLLocationCoordinate2DMake(0, 0)) ] let polygon = MKPolygon(points: bugPoints, count: notBugPoints.count) mapView.addOverlay(polygon) // Frame our annotation and overlay mapView.camera = MKMapCamera(lookingAtCenter: CLLocationCoordinate2DMake(10, 10), fromDistance: 5000000, pitch: 0, heading: 0) // Add the created mapView to our Playground Live View PlaygroundPage.current.liveView = mapView
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508
Nov ’24
MapkitJS - not able to click on PointOfInterest and use it for actions
Hi, Have been trying to work with MapkitJS for a website, but I'm stumped on once basic capability: I want to be able to click on a point of interest, and perform some actions such as: Get its coordinates Attach an annotation to it (e.g. a callout) In my code, PointOfInterest's are selectable: map.selectableMapFeatures = [ mapkit.MapFeatureType.PointOfInterest, ]; But when I click on one, I do see the marker pop up but nothing else (which is not much help since there is no additional information in the marker itself). I see no event getting triggered that I can do something with. I am using an event listener as follows: map.addEventListener('single-tap', (event) => { const coordinate = map.convertPointOnPageToCoordinate(event.pointOnPage); console.log('Map tapped at:', coordinate); console.log('Map tapped event:', event); ... I guess I have to grab the Place ID somehow but I don't know how to. Thanks for any help.
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547
Nov ’24