98 lines
3.1 KiB
Swift
98 lines
3.1 KiB
Swift
//
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// HomeLocationProvider.swift
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// suixinkan
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//
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import CoreLocation
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/// 首页位置采集结果。
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struct HomeLocationSnapshot: Sendable {
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let latitude: Double
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let longitude: Double
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let address: String
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}
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/// 首页位置采集，基于 CoreLocation 并提供可选逆地理。
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final class HomeLocationProvider: NSObject, CLLocationManagerDelegate {
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private let manager = CLLocationManager()
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private var coordinateContinuation: CheckedContinuation<CLLocationCoordinate2D, Error>?
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override init() {
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super.init()
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manager.delegate = self
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manager.desiredAccuracy = kCLLocationAccuracyBest
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}
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/// 请求当前位置与地址。
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func requestSnapshot() async throws -> HomeLocationSnapshot {
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let status = manager.authorizationStatus
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if status == .notDetermined {
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manager.requestWhenInUseAuthorization()
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try await Task.sleep(nanoseconds: 300_000_000)
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}
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let resolvedStatus = manager.authorizationStatus
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guard resolvedStatus == .authorizedWhenInUse || resolvedStatus == .authorizedAlways else {
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throw HomeLocationProviderError.permissionDenied
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}
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let coordinate = try await requestCoordinate()
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let address = await reverseGeocode(latitude: coordinate.latitude, longitude: coordinate.longitude)
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return HomeLocationSnapshot(
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latitude: coordinate.latitude,
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longitude: coordinate.longitude,
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address: address
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)
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}
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private func requestCoordinate() async throws -> CLLocationCoordinate2D {
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try await withCheckedThrowingContinuation { continuation in
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self.coordinateContinuation = continuation
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manager.requestLocation()
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}
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}
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private func reverseGeocode(latitude: Double, longitude: Double) async -> String {
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let location = CLLocation(latitude: latitude, longitude: longitude)
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let geocoder = CLGeocoder()
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do {
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let placemarks = try await geocoder.reverseGeocodeLocation(location)
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return placemarks.first?.formattedAddress ?? ""
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} catch {
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return ""
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}
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}
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func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
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guard let location = locations.last else { return }
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coordinateContinuation?.resume(returning: location.coordinate)
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coordinateContinuation = nil
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}
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func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
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coordinateContinuation?.resume(throwing: error)
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coordinateContinuation = nil
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}
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}
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/// 首页定位错误。
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enum HomeLocationProviderError: LocalizedError {
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case permissionDenied
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var errorDescription: String? {
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switch self {
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case .permissionDenied: "需要位置权限才能上线"
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}
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}
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}
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private extension CLPlacemark {
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var formattedAddress: String {
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[subLocality, locality, administrativeArea]
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.compactMap { $0?.trimmingCharacters(in: .whitespacesAndNewlines) }
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.filter { !$0.isEmpty }
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.joined(separator: "")
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}
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}
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