Аdd the ability to track validation without action

Author: Victor Kostin

ExampleApp/ExampleApp/UI/ContentScreen/ContentView.swift

@@ -10,11 +10,13 @@ import FormView
 
 struct ContentView: View {
     @ObservedObject var viewModel: ContentViewModel
+    @State var isAllFieldValid = false
 
     var body: some View {
         FormView(
             validate: [.manual, .onFieldValueChanged, .onFieldFocus],
-            hideError: .onValueChanged
+            hideError: .onValueChanged,
+            isAllFieldValid: $isAllFieldValid
         ) { proxy in
             FormField(
                 value: $viewModel.name,
@@ -52,7 +54,7 @@ struct ContentView: View {
                     print("Form is valid: \(await proxy.validate())")
                 }
             }
-            .disabled(viewModel.isLoading)
+            .disabled(isAllFieldValid == false || viewModel.isLoading)
         }
         .padding(.horizontal, 16)
         .padding(.top, 40)

README.md

@@ -57,11 +57,13 @@ struct MyField: View {
 ```swift
 struct ContentView: View {
     @State var name: String = ""
+    @State var isAllFieldValid = false
 
     var body: some View {
         FormView( First failed field 
             validate: .never, // Form will be validated on user action.
-            hideError: .onValueChanged // Error for field wil be hidden on field value change.
+            hideError: .onValueChanged, // Error for field wil be hidden on field value change.
+            isAllFieldValid: $isAllFieldValid // Property indicating the result of validation of all fields without focus
         ) { proxy in
             FormField(
                 value: $name,
@@ -74,6 +76,7 @@ struct ContentView: View {
                 // Validate form on user action.
                 print("Form is valid: \(proxy.validate())")
             }
+            .disabled(isAllFieldValid == false) // Use isAllFieldValid to automatically disable the action button
         }
     }
 }
@@ -92,6 +95,9 @@ Error for each field gets hidden at one of three specific times:
 * `onFocus` - field with error is focused..
 * `onFucusLost` - field with error lost focus.
 
+### Is All Field Valid
+Property indicating the result of validation of all fields without focus. Using this property you can additionally build ui update logic, for example block the next button.
+
 ### Custom Validation Rules
 One of two ways:
 1. Adopt protocol `ValidationRule`:
@@ -224,7 +230,7 @@ FormView doesn't use any external dependencies.
 dependencies: [
     .package(
         url: "https://github.com/MobileUpLLC/FormView",
-        .upToNextMajor(from: "1.1.2")
+        .upToNextMajor(from: "1.3.0")
     )
 ]
 ```

Sources/FormView/FormField.swift

@@ -12,6 +12,7 @@ public struct FormField<Content: View>: View {
     @ViewBuilder private let content: ([ValidationRule]) -> Content
 
     @State private var failedValidationRules: [ValidationRule] = []
+    private var isValid: Bool { failedValidationRules.isEmpty && value.isEmpty == false }
 
     // Fields Focus
     @FocusState private var isFocused: Bool
@@ -57,6 +58,7 @@ public struct FormField<Content: View>: View {
                     }
                 ]
             )
+            .preference(key: FieldsValidationKey.self, value: [isValid])
             .focused($isFocused)
 
         // Fields Validation

Sources/FormView/FormView.swift

@@ -63,6 +63,7 @@ private class FormStateHandler: ObservableObject {
 
 public struct FormView<Content: View>: View {
     @StateObject private var formStateHandler = FormStateHandler()
+    @Binding private var isAllFieldValid: Bool
     @ViewBuilder private let content: (FormValidator) -> Content
 
     private let errorHideBehaviour: ErrorHideBehaviour
@@ -71,11 +72,13 @@ public struct FormView<Content: View>: View {
     public init(
         validate: [ValidationBehaviour] = [.manual],
         hideError: ErrorHideBehaviour = .onValueChanged,
+        isAllFieldValid: Binding<Bool> = .constant(true),
         @ViewBuilder content: @escaping (FormValidator) -> Content
     ) {
         self.content = content
         self.validationBehaviour = validate
         self.errorHideBehaviour = hideError
+        self._isAllFieldValid = isAllFieldValid
     }
 
     public var body: some View {
@@ -85,6 +88,9 @@ public struct FormView<Content: View>: View {
             .onPreferenceChange(FieldStatesKey.self) { [weak formStateHandler] newStates in
                 formStateHandler?.updateFieldStates(newStates: newStates)
             }
+            .onPreferenceChange(FieldsValidationKey.self) { validationResults in
+                isAllFieldValid = validationResults.contains(false) == false
+            }
             .onSubmit(of: .text) { [weak formStateHandler] in
                 formStateHandler?.submit()
             }

Sources/FormView/Preference/FieldsValidationKey.swift

@@ -0,0 +1,16 @@
+//
+//  FieldsValidationKey.swift
+//  FormView
+//
+//  Created by Victor Kostin on 31.03.2025.
+//
+
+import SwiftUI
+
+struct FieldsValidationKey: PreferenceKey {
+    static var defaultValue: [Bool] = []
+    
+    static func reduce(value: inout [Bool], nextValue: () -> [Bool]) {
+        value += nextValue()
+    }
+}