d

src/App.swift

@@ -3,7 +3,6 @@ import UIKit
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate
 {
-    let bus = Bus.Service()
     let fmt = MeetupId.MeetupIdFormatter()
     var window: UIWindow?
 

src/Bus.swift

@@ -1,20 +1,13 @@
 import Combine
-import SwiftUI
+import Foundation
 
 public enum Bus { }
 
 extension Bus {
-  public final class Service {
-    static private(set) weak var singleton: Service?
+  final class Service {
+    static let singleton = Service()
     let broadcaster = PassthroughSubject<(key: String, value: Any), Never>()
-    
-    deinit {
-        Self.singleton = nil
-    }
-    
-    public init() {
-        Self.singleton = self
-    }
+    var subscriptions = Set<AnyCancellable>()
     
     func send(_ key: String, _ value: Any) {
         /**/print("ИГР BusS.send key/value: '\(key)'/'\(value)'")
@@ -29,7 +22,7 @@ public extension Bus {
         _ keys: Set<String>,
         _ handler: @escaping ((String, T) -> Void)
     ) {
-        Service.singleton?.broadcaster
+        Service.singleton.broadcaster
             .compactMap { v -> (String, T)? in
                 guard
                     keys.contains(v.key),
@@ -49,7 +42,7 @@ public extension Bus {
         _ keys: Set<String>,
         _ handler: @escaping ((String, T) -> Void)
     ) {
-        Service.singleton?.broadcaster
+        Service.singleton.broadcaster
             .compactMap { v -> (String, T)? in
                 guard
                     keys.contains(v.key),
@@ -70,7 +63,7 @@ public extension Bus {
     ) {
         node
             .receive(on: DispatchQueue.main)
-            .sink { v in Service.singleton?.send(key, v) }
+            .sink { v in Service.singleton.send(key, v) }
             .store(in: &subscriptions)
     }
     
@@ -80,12 +73,12 @@ public extension Bus {
         _ node: AnyPublisher<T, Never>
     ) {
         node
-            .sink { v in Service.singleton?.send(key, v) }
+            .sink { v in Service.singleton.send(key, v) }
             .store(in: &subscriptions)
     }
     
     static func sendOnce(_ key: String, _ value: Any) {
-        Service.singleton?.send(key, value)
+        Service.singleton.send(key, value)
     }
 }
 
@@ -96,7 +89,7 @@ public extension Bus {
         _ keyOut: String,
         _ handler: @escaping ((Src) -> Dst?)
     ) {
-        Service.singleton?.broadcaster
+        Service.singleton.broadcaster
             .compactMap {
                 guard
                     $0.key == keyIn,
@@ -106,7 +99,7 @@ public extension Bus {
                 }
                 return handler(vIn)
             }
-            .sink { vOut in Service.singleton?.send(keyOut, vOut) }
+            .sink { vOut in Service.singleton.send(keyOut, vOut) }
             .store(in: &subscriptions)
     }
 }