SwiftUI 2.0 中使用Map组件

简单使用：显示指定位置坐标与缩放

import SwiftUI
import MapKit
struct ContentView: View {
    @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 30.2906511800, longitude: 120.2623587000), span: MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05))
    var body: some View {
        VStack{
            Map(coordinateRegion: $region)
        }
    }
}

** 显示大头针与手动缩放：**

import SwiftUI
import MapKit

struct Annotation:Identifiable {
    let id = UUID()
    let coordinate:CLLocationCoordinate2D
}

struct ContentView: View {
    @State private var userTrackingMode:MapUserTrackingMode = MapUserTrackingMode.follow
    @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 30.2906511800, longitude: 120.2623587000), span: MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05))
    let annotations = [
        Annotation(coordinate: .init(latitude: 30.2926511800, longitude: 120.2623587000)),
        Annotation(coordinate: .init(latitude: 30.2826511800, longitude: 120.2623587000)),
        Annotation(coordinate: .init(latitude: 30.2726511800, longitude: 120.2623587000)),
    ]
    var body: some View {
        VStack{
//            Map(coordinateRegion: $region)
            Map(coordinateRegion: $region, interactionModes: MapInteractionModes.all, showsUserLocation: true, userTrackingMode: $userTrackingMode, annotationItems: annotations) { annotation in
                MapMarker(coordinate: annotation.coordinate, tint: .blue)
            }
            Button("缩放"){
                region.span = MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1)
            }
        }
    }
}