Added persistent trip meter.
Save Trip distance even if application is closed.
This commit is contained in:
Justin Oros
+34
-32
@@ -9,41 +9,39 @@ import SwiftUI
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import CoreLocation
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struct ContentView: View {
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// Location manager to track speed and position
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@StateObject private var locationManager = LocationManager()
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// Unit toggle (true = MPH, false = KPH)
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@State private var isMPH = true
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// For tracking total trip distance
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@StateObject private var locationManager = LocationManager() // Manages live GPS data
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@State private var isMPH = true // Toggle between MPH and KPH
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@State private var previousLocation: CLLocation?
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@State private var tripDistanceMeters: Double = 0.0
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@State private var tripDistanceMeters: Double = 0.0 // Trip distance in meters
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@State private var isDarkMode = true // Theme toggle: dark/light
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@State private var isMinimalView = false // Toggle minimal UI showing only speed
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// Dark mode toggle
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@State private var isDarkMode = true
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// Load saved trip distance when the view is initialized (even before body runs)
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init() {
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if let savedDistance = UserDefaults.standard.object(forKey: "TripDistance") as? Double {
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_tripDistanceMeters = State(initialValue: savedDistance)
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}
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}
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// Controls whether only speed is shown (minimal view)
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@State private var isMinimalView = false
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// Computed speed based on selected unit
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// Current speed converted to either MPH or KPH
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var currentSpeed: Int {
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let multiplier = isMPH ? 1.0 : 1.60934
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return Int(Double(locationManager.speed) * multiplier)
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}
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// Label for speed unit
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// Display correct unit
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var unitLabel: String {
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isMPH ? "mph" : "kph"
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}
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// Distance label (formatted with appropriate unit)
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// Display formatted trip distance
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var distanceLabel: String {
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let distance = isMPH ? tripDistanceMeters * 0.000621371 : tripDistanceMeters / 1000
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let roundedDistance = Int(distance.rounded())
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return "\(roundedDistance) \(isMPH ? "miles" : "km")"
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}
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// Color indicating GPS accuracy
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// Color based on GPS accuracy
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var accuracyColor: Color {
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switch locationManager.accuracy {
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case ..<10:
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@@ -55,7 +53,7 @@ struct ContentView: View {
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}
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}
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// Text and background colors based on theme
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// Theme-based color helpers
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var foregroundColor: Color {
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isDarkMode ? .white : .black
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}
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@@ -70,14 +68,12 @@ struct ContentView: View {
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var body: some View {
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ZStack {
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// Full-screen background color
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backgroundColor.ignoresSafeArea()
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// Main vertical layout
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VStack(spacing: 30) {
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Spacer()
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// Speed display with unit
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// Speed value and unit
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HStack(alignment: .bottom, spacing: 4) {
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Text("\(currentSpeed)")
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.font(.system(size: 140, weight: .bold, design: .rounded))
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@@ -87,26 +83,25 @@ struct ContentView: View {
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.font(.title2)
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.foregroundColor(secondaryTextColor)
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.onTapGesture {
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isMPH.toggle() // Toggle between mph and kph
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isMPH.toggle() // Tap to switch between MPH/KPH
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}
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}
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// Show trip info and controls only if not in minimal view
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// Extra details (hidden in minimal mode)
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if !isMinimalView {
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// Trip distance
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Text("Trip: \(distanceLabel)")
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.font(.title2)
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.foregroundColor(secondaryTextColor)
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// GPS accuracy
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Text(String(format: "GPS Accuracy: ±%.0f meters", locationManager.accuracy))
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.font(.headline)
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.foregroundColor(accuracyColor)
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// Reset trip button
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// Reset trip button clears distance and saved value
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Button(action: {
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tripDistanceMeters = 0
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previousLocation = nil
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UserDefaults.standard.set(0.0, forKey: "TripDistance") // Clear persistence
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}) {
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Text("Reset Trip")
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.font(.headline)
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@@ -122,11 +117,11 @@ struct ContentView: View {
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}
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.padding()
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// Overlay controls (bottom corners)
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// Bottom control buttons
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VStack {
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Spacer()
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HStack {
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// 👁 Eye icon to toggle minimal view (bottom-left)
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// Toggle minimal/full view
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Button(action: {
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isMinimalView.toggle()
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}) {
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@@ -138,7 +133,7 @@ struct ContentView: View {
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Spacer()
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// ⚙️ Gear icon to open app settings (bottom-right)
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// Open device Settings
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Button(action: {
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if let url = URL(string: UIApplication.openSettingsURLString) {
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UIApplication.shared.open(url)
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@@ -153,11 +148,14 @@ struct ContentView: View {
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.padding([.leading, .trailing, .bottom], 10)
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}
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}
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// Tap anywhere to toggle dark/light mode
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.onTapGesture {
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isDarkMode.toggle() // Toggle between light and dark mode
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isDarkMode.toggle()
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}
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// Show alert if permissions or GPS fail
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.alert(isPresented: $locationManager.showAlert) {
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// Show alert if location services are unavailable
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Alert(
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title: Text("Location Services"),
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message: Text(locationManager.alertMessage),
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@@ -168,12 +166,16 @@ struct ContentView: View {
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}
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)
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}
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// Track location updates and calculate distance
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// Update trip distance whenever a new location is received
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.onReceive(locationManager.$location) { location in
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if let newLocation = location {
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if let oldLocation = previousLocation {
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let distance = newLocation.distance(from: oldLocation)
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tripDistanceMeters += distance
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// Save updated trip distance
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UserDefaults.standard.set(tripDistanceMeters, forKey: "TripDistance")
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}
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previousLocation = newLocation
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}
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