Show Input Text Fields in SwiftUI Alerts with Form Validations.

SwiftUIInputAlert.swift

//
//  SwiftUIInputAlert.swift
//  Swity Notes
//
//  Created by Gurjit's Macbook on 20/07/23.
//

import SwiftUI

struct SwiftUIInputAlert: View {
    
    @State var name: String?
    @State var jobTitle: String?
    
    @State private var isInputAlertShown = false
    @State private var newName: String = ""
    @State private var newJobTitle: String = ""
    @State private var isErrorAlertShown: Bool = false
    @State private var alertTitle: String = ""
    @State private var alertMsg: String = ""
    
    private enum FormValidationError: Error, LocalizedError {
        case noNemeEntered
        case noJobTitleEntered
        
        var errorDescription: String? {
            switch self {
            case .noNemeEntered:        return "No Name Entered!"
            case .noJobTitleEntered:    return "No Job Title Entered"
            }
        }
        
    }
    
    var body: some View {
        VStack(spacing: 8) {
            Text(name ?? "")
            Text(jobTitle ?? "")
            Button((name ?? "" + (jobTitle ?? "")).isEmpty ? "Add Info" : "Edit Info") {
                isInputAlertShown = true
            }
            .alert("Add Your Info", isPresented: $isInputAlertShown) {
                TextField("Enter Name", text: $newName).textInputAutocapitalization(.words)
                
                TextField("Enter Job Title", text: $newJobTitle)
                        .textInputAutocapitalization(.sentences)
                Button("Add", action: addInfo)
                Button("Cancel", role: .cancel) { }
            }
            .alert(isPresented: $isErrorAlertShown) {
                Alert(title: Text(alertTitle), message: Text(alertMsg), dismissButton: .cancel(Text("Ok")) {
                    isInputAlertShown = true
                })
            }
        }
    }
    
    private func addInfo() {
        do {
            try validateForm()
            self.name = newName
            self.jobTitle = newJobTitle
        } catch {
            alertTitle = "Error!"
            alertMsg = error.localizedDescription
            isErrorAlertShown = true
        }
    }
    
    private func validateForm() throws {
        guard !newName.isEmpty else {
            throw FormValidationError.noNemeEntered
        }
        guard !newJobTitle.isEmpty else {
            throw FormValidationError.noJobTitleEntered
        }
    }
    
}

struct SwiftUIInputAlert_Previews: PreviewProvider {
    static var previews: some View {
        SwiftUIInputAlert()
    }
}

SwiftUIInputAlert.mov