SwiftUI - Locations
StandardStyleLocationsExample.swift
@_spi(Experimental) import MapboxMaps
import SwiftUI
@available(iOS 14.0, *)
struct StandardStyleLocationsExample: View {
@State private var lightPreset: StandardLightPreset = .day
@State private var poi = true
@State private var transitLabels = true
@State private var placeLabels = true
@State private var roadLabels = true
@State private var selectedBookmark = Location.all.first!
@State private var viewport: Viewport = Location.all.first!.viewport
@State private var settingsHeight: CGFloat = 0
var body: some View {
Map(viewport: $viewport)
.mapStyle(.standard(
lightPreset: lightPreset,
showPointOfInterestLabels: poi,
showTransitLabels: transitLabels,
showPlaceLabels: placeLabels,
showRoadLabels: roadLabels))
// Center of the map will be translated in order to accommodate settings panel
.additionalSafeAreaInsets(.bottom, settingsHeight)
.ignoresSafeArea()
.safeOverlay(alignment: .bottom) {
settingsPanel
}
.onChange(of: selectedBookmark) { newValue in
viewport = newValue.viewport
}
}
@ViewBuilder
var settingsPanel: some View {
VStack(alignment: .leading) {
SelectorView(data: Location.all, selection: $selectedBookmark) { b in
Text(b.title)
}
HStack {
Text("Light")
Picker("Light", selection: $lightPreset) {
Text("Dawn").tag(StandardLightPreset.dawn)
Text("Day").tag(StandardLightPreset.day)
Text("Dusk").tag(StandardLightPreset.dusk)
Text("Night").tag(StandardLightPreset.night)
}.pickerStyle(.segmented)
}
HStack {
Text("Labels")
Group {
Toggle("Poi", isOn: $poi)
Toggle("Transit", isOn: $transitLabels)
Toggle("Places", isOn: $placeLabels)
Toggle("Roads", isOn: $roadLabels)
}
.font(.footnote)
}.toggleStyleButton()
}
.padding(10)
.floating(RoundedRectangle(cornerRadius: 10))
.background(GeometryReader() { proxy in
Color.clear.onAppear() { settingsHeight = proxy.size.height }
})
}
}
@available(iOS 13.0, *)
private struct Location: Equatable, Identifiable {
var id: String { title }
var title: String
var viewport: Viewport
static let all = [
Location(title: "Globe", viewport: .camera(center: .init(latitude: 27.2, longitude: -26.9), zoom: 1.53, bearing: 0, pitch: 0)),
Location(title: "Europe", viewport: .camera(center: .init(latitude: 47.29, longitude: 0), zoom: 3.28, bearing: 0, pitch: 0)),
Location(title: "Paris", viewport: .camera(center: .init(latitude: 48.8603, longitude: 2.2932), zoom: 15.58, bearing: 337.89, pitch: 59.67)),
Location(title: "Japan", viewport: .camera(center: .init(latitude: 36.11, longitude: 138.239), zoom: 6.15, bearing: -85.9, pitch: 61)),
Location(title: "Washington DC", viewport: .camera(center: .init(latitude: 38.915, longitude: -76.972), zoom: 7.16, bearing: 0, pitch: 0)),
Location(title: "Amsterdam", viewport: .camera(center: .init(latitude: 52.344, longitude: 4.89), zoom: 10.33, bearing: 0, pitch: 66)),
Location(title: "Brasília", viewport: .camera(center: .init(latitude: -15.792, longitude: -47.888), zoom: 12.21, bearing: -25.8, pitch: 28)),
Location(title: "Chicago", viewport: .camera(center: .init(latitude: 41.8812, longitude: -87.62855), zoom: 14.12, bearing: 0, pitch: 0)),
Location(title: "Brussels", viewport: .camera(center: .init(latitude: 50.8443, longitude: 4.364), zoom: 15.75, bearing: -113.6, pitch: 38)),
Location(title: "New York", viewport: .camera(center: .init(latitude: 40.7488, longitude: -73.9682), zoom: 16.41, bearing: 96.8, pitch: 38)),
Location(title: "San Diego", viewport: .camera(center: .init(latitude: 32.7062, longitude: -117.1595), zoom: 18.77, bearing: -53.1, pitch: 72))
]
}
@available(iOS 13.0, *)
private struct SelectorView<T, Content>: View where T: RandomAccessCollection, T.Element: Identifiable, Content: View {
var data: T
@Binding
var selection: T.Element
var content: (T.Element) -> Content
func select(_ offset: Int) {
guard let currentIdx = data.firstIndex(where: { $0.id == selection.id }) else { return }
var idx = data.index(currentIdx, offsetBy: offset)
if idx == data.endIndex {
idx = data.startIndex
} else if idx == data.index(before: data.startIndex) {
idx = data.index(before: data.endIndex)
}
selection = data[idx]
}
var body: some View {
HStack {
Button { select(-1) } label: {
Image(systemName: "chevron.left")
}
Spacer()
content(selection)
Spacer()
Button { select(1) } label: {
Image(systemName: "chevron.right")
}
}
}
}
private struct Pair<First, Second> {
var first: First
var second: Second
init(_ first: First, _ second: Second) {
self.first = first
self.second = second
}
}
extension Pair: Equatable where First: Equatable, Second: Equatable {}
@available(iOS 14.0, *)
struct StandardStyleLocationsExample_Previews: PreviewProvider {
static var previews: some View {
StandardStyleLocationsExample()
}
}
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