I'm following the SwiftUI tutorial.
When i got to the part with Map from MapKit XCode shows the use of unresolved identifier 'Map'.
import SwiftUI
import MapKit
struct MapView: View {
#State private var region = MKCoordinateRegion(
center: CLLocationCoordinate2D(latitude: 34.011_286, longitude: -116.166_868),
span: MKCoordinateSpan(latitudeDelta: 0.2, longitudeDelta: 0.2)
)
var body: some View {
Map(coordinateRegion: $region)
}
}
struct MapView_Previews: PreviewProvider {
static var previews: some View {
MapView()
}
}
Related
Is it possible with the newer MapKit, i.e using Map(), to change the map type to for instance satellite? I know that it is possible by using the old ways with UIviews and so on but where I get in trouble is when I want to use map annotations which are super simple in the new MapKit. (I want to loop through some CoreData an display the data on a map).
I actually tested the answer in this post SwiftUI: change map type on map view? and it worked when starting the app, but when I leaved the view where the map was in and then entered back to the view the maps was back to its standard view, not satellite.
Is there a simple solution to this or should I just live with it and hope for a change at this year WWDC?
Here is an example code (its from hackingWithSwift):
import SwiftUI
import MapKit
struct MapTypesView: View {
#State private var mapRegion = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.5, longitude: -0.12), span: MKCoordinateSpan(latitudeDelta: 0.2, longitudeDelta: 0.2))
var body: some View {
Map(coordinateRegion: $mapRegion, annotationItems: locations) {
location in MapAnnotation(coordinate: location.coordinate){
NavigationLink {
Text(location.name)
} label: {
Circle()
.stroke(.red, lineWidth: 3)
.frame(width: 44, height: 44)
}
}
}
.onAppear {
MKMapView.appearance().mapType = .satellite
}
}
}
struct MapTypesView_Previews: PreviewProvider {
static var previews: some View {
MapTypesView()
}
}
struct Location: Identifiable {
let id = UUID()
let name: String
let coordinate: CLLocationCoordinate2D
}
let locations = [
Location(name: "Buckingham Palace", coordinate: CLLocationCoordinate2D(latitude: 51.501, longitude: -0.141)),
Location(name: "Tower of London", coordinate: CLLocationCoordinate2D(latitude: 51.508, longitude: -0.076))
]
And below is my very simple contentView:
import SwiftUI
struct ContentView: View {
var body: some View {
NavigationView {
VStack {
NavigationLink {
MapTypesView()
} label: {
Image(systemName: "map")
.imageScale(.large)
.foregroundColor(.accentColor)
}
}
.padding()
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
I have a map with marks. When you press it, it centers. But when I rotate the map and click on the marker, it returns to its original value. I don't want the map to come back and the degrees stay the same.
I think that this can be solved through the camera, but I do not know how to do it.
I don't want the rotation to happen and the marker to just be centered. And rotation, if necessary, you can click on the compass in the upper right corner.
My code:
import SwiftUI
import MapKit
struct MapScreenView: View {
#StateObject private var vm = LocationsViewModel()
#State private var camera = MKMapCamera(lookingAtCenter: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698), fromDistance: 7500, pitch: 0, heading: 0)
var body: some View {
ZStack {
VStack {
HStack {
ButtonFilterView()
Spacer()
}
Spacer()
}.zIndex(1)
Map(coordinateRegion:
$vm.mapRegion, annotationItems: vm.locations) {
location in
MapAnnotation(coordinate: location.coordinate) {
LocationMapAnnotationView()
.scaleEffect(vm.mapLocation == location ? 1.1 : 0.7)
.offset(y: vm.mapLocation == location ? -11.5 : 0)
.animation(.easeInOut, value: vm.mapLocation == location)
.onTapGesture {
vm.showTappedLocation(location: location)
}
}
}
.onAppear {
MKMapView.appearance().isZoomEnabled = false
MKMapView.appearance().preferredConfiguration = MKStandardMapConfiguration(elevationStyle: .realistic)
MKMapView.appearance().pointOfInterestFilter = .some(MKPointOfInterestFilter.excludingAll)
MKMapView.appearance().isRotateEnabled = true
MKMapView.appearance().isPitchEnabled = true
MKMapView.appearance().isScrollEnabled = false
}
.edgesIgnoringSafeArea(.all)
}
}
}
struct MapScreenView_Previews: PreviewProvider {
static var previews: some View {
MapScreenView()
}
}
import Foundation
import MapKit
import SwiftUI
class LocationsViewModel: ObservableObject {
#Published var locations: [Location] = LocationDataService.locations
#Published var mapLocation: Location {
didSet {
updateMapRegion(location: mapLocation)
}
}
#Published var mapRegion = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698),
span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1))
#Published var mapSpan = MKCoordinateSpan(latitudeDelta: 0.04, longitudeDelta: 0.04)
init() {
self.mapLocation = Location(name: "", coordinate: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698))
updateMapRegion(location: Location(name: "", coordinate: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698)))
}
private func updateMapRegion(location: Location) {
withAnimation(.easeInOut) {
mapRegion.center = location.coordinate
}
}
func showTappedLocation(location: Location) {
mapLocation = location
}
}
I think that this can be solved through the camera, but I do not know how to do it.
import SwiftUI
import MapKit
import LocalAuthentication
struct ContentView: View {
#State private var mapRegion = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.4, longitude: -0.1), span: MKCoordinateSpan(latitudeDelta: 1, longitudeDelta: 1))
var body: some View {
Map(coordinateRegion: $mapRegion)
.ignoresSafeArea()
}
}
When I run this code Xcode gives this Issue:
Modifying state during view update, this will cause undefined behavior.
When I remove .ignoresSafeArea() modifier from Map() the problem disappears. Is this a bug?
I'm working with a map kit map and I need to get the current value of the coordinate span model.
So that when you click on the map point, the map itself does not jump.
import SwiftUI
import MapKit
struct MapScreenView: View {
#StateObject private var vm = LocationsViewModel()
var body: some View {
ZStack {
VStack {
HStack {
ButtonFilterView()
Spacer()
}
Spacer()
}.zIndex(1)
Map(coordinateRegion:
$vm.mapRegion, annotationItems: vm.locations) {
location in
MapAnnotation(coordinate: location.coordinate) {
LocationMapAnnotationView()
.scaleEffect(vm.mapLocation == location ? 1.1 : 0.7)
.animation(.easeInOut, value: vm.mapLocation == location)
.onTapGesture {
vm.showTappedLocation(location: location)
}
}
}
.edgesIgnoringSafeArea(.all)
}
}
}
struct MapScreenView_Previews: PreviewProvider {
static var previews: some View {
MapScreenView()
}
}
import Foundation
import MapKit
import SwiftUI
class LocationsViewModel: ObservableObject {
#Published var locations: [Location] = LocationDataService.locations
#Published var mapLocation: Location {
didSet {
updateMapRegion(location: mapLocation)
}
}
#Published var mapRegion = MKCoordinateRegion()
#Published var mapSpan = MKCoordinateSpan(latitudeDelta: 0.04, longitudeDelta: 0.04)
init() {
self.mapLocation = Location(name: "", coordinate: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698))
updateMapRegion(location: Location(name: "", coordinate: CLLocationCoordinate2D(latitude: 55.755864, longitude: 37.617698)))
}
private func updateMapRegion(location: Location) {
withAnimation(.easeInOut) {
mapRegion = MKCoordinateRegion(
center: location.coordinate,
/// here i want get current span value
span: location.name == "" ? MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1) : mapSpan
)
}
}
func showTappedLocation(location: Location) {
mapLocation = location
}
}
When I click on the map pin, it returns to the hard code span.
How can I get current span?
I searched for many solutions, but did not find the right one
SwiftUI Map takes a binding to a MKCoordinateRegion.
In your code you have...
Map(coordinateRegion: $vm.mapRegion, ...
This is a twi way communication between the view model's region and the map view. When the map updates, this region updates. When you update the region, the map updates.
So the current values of your map are help inside that mapRegion.
Looking at the docs for MKCoordinateRegion https://developer.apple.com/documentation/mapkit/mkcoordinateregion/1452293-span
It has a property span which is an MKCoordinateSpan.
So in the view model... this is the current span of the map.
To update your function you could do something like...
private func updateMapRegion(location: Location) {
withAnimation(.easeInOut) {
mapRegion = MKCoordinateRegion(
center: location.coordinate,
/// here i want get current span value
span: mapRegion.span
)
}
}
Having said that, you seem to be creating a whole new region here. I don't know if that's a good idea. You could just update the center of the existing region without creating a whole new one.
private func updateMapRegion(location: Location) {
withAnimation(.easeInOut) {
mapRegion.center = location.coordinate
}
}
I want to show the users location on a struct view of a MapView. Currently, the map is implemented with showing places fetched from an API.
Now I want to add the user location. It is done in a struct so that it can be called as a tabItem.
Most tutorials are showing the implementation in a class. Is there a simple way to add the user location to this struct?
import MapKit
import SwiftUI
import CoreLocation
struct MapView: View{
#EnvironmentObject var places: Places
#State var placesAPI = [Place]()
#State var region = MKCoordinateRegion(
center: CLLocationCoordinate2D(latitude: 51.3704, longitude: 6.1724),
span: MKCoordinateSpan(latitudeDelta: 5, longitudeDelta: 5)
)
var body: some View {
Map(coordinateRegion: $region, annotationItems: places) {
places in
MapAnnotation(coordinate: CLLocationCoordinate2D(latitude: places.latitude, longitude: places.longitude)) {
NavigationLink(destination: DiscoverView(place: places)) {
Image(places.city)
.resizable()
.cornerRadius(10)
.frame(width: 40, height: 20)
.shadow(radius: 3)
}
}
}
.navigationTitle("Locations")
.onAppear(){
apiCallPlaces().getPlaces{(places) in
self.places = places
}
}
}
}
struct MapView_Previews: PreviewProvider {
static var previews: some View {
MapView()
}
}
If all you need is the to show it just use a different constructor for Map
https://developer.apple.com/documentation/mapkit/map
init(coordinateRegion: Binding<MKCoordinateRegion>, interactionModes: MapInteractionModes, showsUserLocation: Bool, userTrackingMode: Binding<MapUserTrackingMode>?)
Having showsUserLocation set to true will do the trick with the proper permissions.