iOS: Add WiFi disconnected hint

NearbyShare/Connection/NearbyConnectionManager.swift

@@ -35,6 +35,8 @@ public class NearbyConnectionManager: NSObject, NetServiceDelegate, InboundNearb
     private var qrCodePrivateKey: ECPrivateKey?
     private var qrCodeAdvertisingToken: Data?
     private var qrCodeNameEncryptionKey: SymmetricKey?
+    private let hasConnectionMonitor = NWPathMonitor()
+    private let connectionMonitorQueue = DispatchQueue(label: "NetworkConnectionMonitorQueue")
     
     public let deviceInfo: EndpointInfo
     public let endpointID: [UInt8] = generateEndpointID()
@@ -43,8 +45,16 @@ public class NearbyConnectionManager: NSObject, NetServiceDelegate, InboundNearb
     
     @Published var attachments: AttachmentDetails? = nil
     @Published var hasLocalNetworkAccess = true
+    @Published var isConnectedViaWiFi = true
+    
+    public var connectionUpdateCallback: (Bool) -> Void = { _ in } {
+        didSet {
+            connectionUpdateCallback(isConnectedViaWiFi)
+        }
+    }
     
     override init() {
+        
 #if os(macOS)
         self.deviceInfo = EndpointInfo(name: Host.current().localizedName ?? "Mac", deviceType: .computer)
 #else
@@ -55,7 +65,26 @@ public class NearbyConnectionManager: NSObject, NetServiceDelegate, InboundNearb
 #endif
         
         tcpListener = try! NWListener(using: NWParameters(tls: .none))
+        
         super.init()
+        
+        hasConnectionMonitor.pathUpdateHandler = { path in
+            if path.usesInterfaceType(.wifi) {
+                log("[NearbyConnectionManager] Connected via WiFi.")
+                DispatchQueue.main.async {
+                    self.isConnectedViaWiFi = true
+                    self.connectionUpdateCallback(true)
+                }
+            } else {
+                log("[NearbyConnectionManager] WiFi connection lost.")
+                DispatchQueue.main.async {
+                    self.isConnectedViaWiFi = false
+                    self.connectionUpdateCallback(false)
+                }
+            }
+        }
+        
+        hasConnectionMonitor.start(queue: connectionMonitorQueue)
     }
     
     

QuickDrop.xcodeproj/xcshareddata/xcschemes/QuickDropiOS.xcscheme

@@ -34,6 +34,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = "en"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"

QuickDrop/AppDelegate.swift

@@ -30,7 +30,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 
     var showsFirewallAlert = false
     var visibleItem: NSMenuItem? = nil
-    let hasConnectionMonitor = NWPathMonitor()
 
     
     // MARK: NSApplicationDelegate functions
@@ -95,21 +94,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 
         UNUserNotificationCenter.current().delegate = self
         
-        hasConnectionMonitor.pathUpdateHandler = { path in
-            DispatchQueue.main.async {
-                if path.status == .satisfied {
-                    self.statusItem?.button?.image = NSImage(named: "MenuBarIcon")
-                    self.visibleItem?.title = "VisibleToEveryone".localized()
-                } else {
-                    self.statusItem?.button?.image = NSImage(named: "MenuBarIconSlash")
-                    self.visibleItem?.title = "NoNetworkConnection".localized()
-                }
-            }
-        }
-
-        let queue2 = DispatchQueue(label: "NetworkConnectionMonitor")
-        hasConnectionMonitor.start(queue: queue2)
-        
         receiveModel = ReceiveModel(controlPlusScreen: { shouldOpen in
             if shouldOpen {
                 self.openPlusScreen()
@@ -123,6 +107,18 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
             }
         })
 
+        
+        NearbyConnectionManager.shared.connectionUpdateCallback = { isConnected in
+            if isConnected {
+                self.statusItem?.button?.image = NSImage(named: "MenuBarIcon")
+                self.visibleItem?.title = "VisibleToEveryone".localized()
+            }
+            else {
+                self.statusItem?.button?.image = NSImage(named: "MenuBarIconSlash")
+                self.visibleItem?.title = "NoNetworkConnection".localized()
+            }
+        }
+        
         log("Application did finish launching")
     }
     

QuickDrop/Localizable.xcstrings

@@ -6416,6 +6416,17 @@
         }
       }
     },
+    "NoWiFiConnectionDescription" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "To transfer files to other devices, please connect this device to a Wi-Fi network."
+          }
+        }
+      }
+    },
     "OpenFinderAfterReceiving" : {
       "localizations" : {
         "ar" : {

QuickDropiOS/ContentView.swift

@@ -93,14 +93,18 @@ struct DeviceListView: View {
                     
                     CustomSection(header: "NoDevicesFound") {
                         
+                        let hasWifi = nearbyConnectionManager.isConnectedViaWiFi
+                        
                         HStack(spacing: 12) {
-                            Image(systemName: "square.and.arrow.down")
+                            Image(systemName: hasWifi ? "arrow.down.circle.fill" : "wifi.slash")
                                 .font(.system(size: 30))
-                                .foregroundColor(.gray)
+                                .foregroundColor(.blue)
                                 .padding(.leading, -10)
+                                .frame(width: 30)
                             
-                            Text("DownloadQuickDropOnPlayStore")
+                            Text(hasWifi ? "DownloadQuickDropOnPlayStore" : "NoWiFiConnectionDescription")
                         }
+                        .animation(.default, value: hasWifi)
                         .padding(.vertical)
                     }
                     
@@ -133,7 +137,7 @@ struct DeviceListView: View {
                 }
                 
                 
-                if nearbyConnectionManager.hasLocalNetworkAccess {
+                if nearbyConnectionManager.hasLocalNetworkAccess && nearbyConnectionManager.isConnectedViaWiFi {
                     HStack(spacing: 8) {
                         Text("SearchingForDevices")
                             .font(.system(size: 14))