fixed memory leak

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDSSample/ViewControllers/TestViewController.swift

@@ -11,13 +11,13 @@ import Combine
 import VDS
 
 struct User {
-   var firstName: String
-   var lastName: String
-
-  init(firstName: String, lastName: String) {
-    self.firstName = firstName
-    self.lastName = lastName
-  }
+    var firstName: String
+    var lastName: String
+    
+    init(firstName: String, lastName: String) {
+        self.firstName = firstName
+        self.lastName = lastName
+    }
 }
 
 public protocol Bindable {
@@ -34,17 +34,21 @@ extension Bindable {
 }
 
 class TextFieldBindingCell: UIView, Bindable {
+    deinit {
+        print("\(Self.self) deinit")
+    }
+    
     //bindable
     var model: User
     var subject: CurrentValueSubject<User, Never>?
-
+    
     let firstNameTextField = TextField()
     let lastNameTextField = TextField()
-        
+    
     init(model: User) {
         self.model = model
         super.init(frame: .zero)
-    
+        
         translatesAutoresizingMaskIntoConstraints = false
         firstNameTextField.translatesAutoresizingMaskIntoConstraints = false
         lastNameTextField.translatesAutoresizingMaskIntoConstraints = false
@@ -52,20 +56,20 @@ class TextFieldBindingCell: UIView, Bindable {
         addSubview(firstNameTextField)
         addSubview(lastNameTextField)
         print("\(model.firstName) \(model.lastName)")
-
+        
         firstNameTextField.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
         firstNameTextField.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
         firstNameTextField.topAnchor.constraint(equalTo: topAnchor).isActive = true
         firstNameTextField.heightAnchor.constraint(equalToConstant: 50).isActive = true
-
+        
         lastNameTextField.topAnchor.constraint(equalTo: firstNameTextField.bottomAnchor, constant: 20).isActive = true
         lastNameTextField.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
         lastNameTextField.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
         lastNameTextField.heightAnchor.constraint(equalToConstant: 50).isActive = true
         lastNameTextField.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
-
+        
     }
-
+    
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
@@ -73,23 +77,25 @@ class TextFieldBindingCell: UIView, Bindable {
     func createBinding(with subject: CurrentValueSubject<User, Never>, storeIn subscriptions: inout Set<AnyCancellable>) {
         self.model = subject.value
         self.subject = subject
-
+        
         //add the logic
         let firstNameSubject = CurrentValueSubject<String, Never>(model.firstName)
         firstNameTextField.createBinding(with: firstNameSubject, storeIn: &subscriptions)
-        firstNameSubject.assign(to: \.model.firstName, on: self).store(in: &subscriptions)
-        firstNameSubject.sink {[weak self] value in
-            self?.send()
-        }.store(in: &subscriptions)
-
+        firstNameSubject
+            .sink {[weak self] value in
+                guard let self = self else { return }
+                self.model.firstName = value
+                self.send()
+            }.store(in: &subscriptions)
+        
         let lastNameSubject = CurrentValueSubject<String, Never>(model.lastName)
         lastNameTextField.createBinding(with: lastNameSubject, storeIn: &subscriptions)
-        lastNameSubject.assign(to: \.model.lastName, on: self).store(in: &subscriptions)
-        lastNameSubject.sink {[weak self] value in
-            guard let self = self else { return }
-            self.send()
-        }.store(in: &subscriptions)
-
+        lastNameSubject
+            .sink {[weak self] value in
+                guard let self = self else { return }
+                self.model.lastName = value
+                self.send()
+            }.store(in: &subscriptions)
     }
 }
 
@@ -97,7 +103,7 @@ class TextFieldBindingCell: UIView, Bindable {
     
     var user = User(firstName: "Joe", lastName: "User")
     private var subscriptions = Set<AnyCancellable>()
-
+    
     required init() {
         super.init(nibName: nil, bundle: nil)
     }
@@ -111,7 +117,11 @@ class TextFieldBindingCell: UIView, Bindable {
         view.backgroundColor = .white
         
         let subject = CurrentValueSubject<User, Never>(user)
-        subject.assign(to: \.user, on: self).store(in: &subscriptions)
+        subject
+            .sink{ [weak self] updatedModel in
+                self?.user = updatedModel
+            }
+            .store(in: &subscriptions)
         
         let nameTextField = TextFieldBindingCell(model: user)
         nameTextField.createBinding(with: subject, storeIn: &subscriptions)
@@ -151,7 +161,7 @@ extension UITextField {
     }
     
     public func createBinding(with subject: CurrentValueSubject<String, Never>,
-                       storeIn subscriptions: inout Set<AnyCancellable>) {
+                              storeIn subscriptions: inout Set<AnyCancellable>) {
         
         subject.sink { [weak self] (value) in
             if value != self?.text {
@@ -174,14 +184,14 @@ class TextField: UITextField {
         bottom: 10,
         right: 20
     )
-
+    
     override func textRect(forBounds bounds: CGRect) -> CGRect {
         layer.borderColor = UIColor.black.cgColor
         layer.borderWidth = 1
         let rect = super.textRect(forBounds: bounds)
         return rect.inset(by: textPadding)
     }
-
+    
     override func editingRect(forBounds bounds: CGRect) -> CGRect {
         layer.borderColor = UIColor.black.cgColor
         layer.borderWidth = 1