MapStyle Enhancements

With the introduction of enhanced map styles, developers can now leverage the dot syntax to easily select predefined styles such as .hybrid and .imagery, which correspond to default values of their static counterparts. For instance, to create a hybrid map style, you can simply write:

Map(.hybrid)

Inside the MapStyle struct, there are two nested structs: MapStyle.Elevation and MapStyle.StandardEmphasis. These elements define the elevation features—like hills and mountains—and how different map features, such as roads and buildings, are emphasized.

import SwiftUI

import MapKit

struct MapStyleView: View {

let mapStyles: [MapStyle] = [

.standard(elevation: .high, showsTraffic: true, pointsOfInterest: .all),

.standard(elevation: .low, showsTraffic: false, pointsOfInterest: .none),

.standard(emphasis: .high),

.standard(emphasis: .low),

.hybrid,

.imagery

]

@State private var selectedMapStyle: MapStyle = .standard(elevation: .high, showsTraffic: true, pointsOfInterest: .all)

@State private var region = MKCoordinateRegion(

center: CLLocationCoordinate2D(latitude: 37.3318, longitude: -122.0312),

span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1)

)

var body: some View {

VStack {

Picker("Map Style", selection: $selectedMapStyle) {

ForEach(mapStyles, id: .self) { style in

Text(style.description) // A description of the map style

}

}

.pickerStyle(.segmented) // Using a segmented picker

Map(region: $region, style: selectedMapStyle)

.ignoresSafeArea() // Ignoring the safe area

}

}

}

This code snippet illustrates the straightforwardness of using MapStyle and SwiftUI to create a user-friendly interface for map selection.

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MapSelectable Features

Another innovative addition in iOS 17 is the MapSelectable protocol, which enables any SwiftUI view to be selectable on a map. By conforming to this protocol, your view can interact with well-known points of interest and geographical features. For instance, you can make a Text view selectable on a map as shown below:

extension Text: MapSelectable {}

This allows you to embed your selectable view into the map with the following implementation:

MapSelectableContentView(Text("Hello, World!")) { isSelected in

if isSelected {

print("Text selected")

} else {

print("Text deselected")

}

}

The MapSelectable protocol also offers a default implementation for the isSelected property, which indicates whether the view is selected on the map. This can be utilized to modify the view's appearance based on its selection state.

Custom Markers in MapKit

One of the standout features in iOS 17 is the ability to create custom markers using any SwiftUI view. This allows for a unique display of map locations, enhancing the user experience. You can utilize the MapMarker struct to create custom markers as follows:

MapMarker(coordinate: CLLocationCoordinate2D(latitude: 37.3318, longitude: -122.0312)) {

ZStack {

Circle().fill(Color.blue).frame(width: 40, height: 40)

Text("Apple").foregroundColor(.white)

}

}

By employing the Map initializer that accepts an array of MapMarker, you can dynamically manage markers:

@State private var markers: [MapMarker] = []

Map($markers)

This flexibility allows you to add or remove markers in real-time, with the map updating automatically.