d

src/SrcFmt.swift

@@ -0,0 +1,25 @@
+import Foundation
+
+class SrcFmt: Formatter {
+    override func string(for obj: Any?) -> String? {
+        /**/print("ИГР SrcF.string obj: '\(obj)'")
+        guard let str = obj as? String else { return nil }
+        return String(str.dropFirst(2))
+    }
+
+    override func getObjectValue(
+        _ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?,
+        for string: String,
+        errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?
+    ) -> Bool {
+        /**/print("ИГР SrcF.getOV string: '\(string)'")
+        let val: String
+        if string.hasPrefix("a:") || string.hasPrefix("u:") {
+            val = string
+        } else {
+            val = "u:\(string)"
+        }
+        obj?.pointee = val as AnyObject
+        return true
+    }
+}

src/V.swift

@@ -10,6 +10,7 @@ struct V: View {
         Text("'\(vm.text)'")
           .fontWeight(.bold)
       }
+        /*
       TextField("Placeholder", text: $vm.text)
         .padding(8)
         .border(Color.red, width: 2)
@@ -17,6 +18,10 @@ struct V: View {
       TextField("Binding-2", text: vm.bt2)
         .padding(8)
         .border(Color.blue, width: 2)
+        */
+        TextField("Binding-3", value: $vm.t3, formatter: SrcFmt())
+          .padding(8)
+          .border(Color.green, width: 4)
     }
     .frame(width: 320)
     .padding()

src/VM.swift

@@ -8,8 +8,24 @@ final class VM: ObservableObject {
   @Published var t2 = "a:value"
   var bt2: Binding<String>!
   var subscriptions = Set<AnyCancellable>()
+    
+  @Published var t3 = "a:value"
 
   init() {
+      $t3
+          //.debounce(for: .seconds(0.3), scheduler: DispatchQueue.main)
+          .sink { v in
+              /**/print("ИГР VM.init t3: '\(v)'")
+              // Ignore repoting application initiated strings
+              // Only report user initiated strings
+              //guard v.hasPrefix("u:") else { return }
+              //Bus.Service.singleton?.send(MeetupId.Keys.meetupIdTextUI.rawValue, String(v.dropFirst(2)))
+          }
+          .store(in: &subscriptions)
+
+
+
+
       bt2 = Binding<String>(
           get: { [weak self] in
               String(self?.t2.dropFirst(2) ?? "")