How to navigate between two API parameters in SwiftUI - ios

Question

I'm beginner of iOS app development, currently doing iOS & Swift Bootcamp on Udemy by Angela Yu. I have this app called H4X0R News, which shows Hacker News all stories that are on the front/home page on the app by using its API. By the end of a module the app works fine when url property from API json is not nil but there are certain cases when url equals nil. These are posts which instead has story_text property. So what I want here to adjust is add story_text to my code and use it to navigate between this and url parameter. Here's the code I've got:
ContentView.swift
import SwiftUI
struct ContentView: View {
#ObservedObject var networkManager = NetworkManager()
var body: some View {
NavigationView {
List(networkManager.posts) { post in
NavigationLink(destination: DetailView(url: post.url)) {
HStack {
Text(String(post.points))
Text(post.title)
}
}
}
.navigationTitle("H4X0R NEWS")
}
.onAppear {
self.networkManager.fechData()
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
WebView.swift
import Foundation
import WebKit
import SwiftUI
struct WebView: UIViewRepresentable {
let urlString: String?
func makeUIView(context: Context) -> WKWebView {
return WKWebView()
}
func updateUIView(_ uiView: WKWebView, context: Context) {
if let safeString = urlString {
if let url = URL(string: safeString) {
let request = URLRequest(url: url)
uiView.load(request)
}
}
}
}
DetailView.swift
import SwiftUI
struct DetailView: View {
let url: String?
var body: some View {
WebView(urlString: url)
}
}
struct DetailView_Previews: PreviewProvider {
static var previews: some View {
DetailView(url: "https://www.google.com/")
}
}
NetworkManager.swift
import Foundation
class NetworkManager: ObservableObject {
#Published var posts = [Post]()
func fechData() {
if let url = URL(string: "http://hn.algolia.com/api/v1/search?tags=front_page") {
let session = URLSession(configuration: .default)
let task = session.dataTask(with: url) { data, response, error in
if error == nil {
let decoder = JSONDecoder()
if let safeData = data {
do {
let results = try decoder.decode(Results.self, from: safeData)
DispatchQueue.main.async {
self.posts = results.hits
}
} catch {
print(error)
}
}
}
}
task.resume()
}
}
}
PostData.swift
import Foundation
struct Results: Decodable {
let hits: [Post]
}
struct Post: Decodable, Identifiable {
var id: String {
return objectID
}
let objectID: String
let points: Int
let title: String
let url: String?
}
So what I'm sure I need to add this story_text to PostData as String? and then make conditional statement in the WebView.updateUIView() function. Then update the code in other files. But like I said, I'm new in the programming world and I seek for help here for the first time since I've started the course.

Answer 1

If I understand you correct, you want to navigate to a simple text view if there is no URL for the Post?
So you can do it like this:
let text: String?
var body: some View {
if let url = url {
WebView(urlString: url)
} else {
Text(text ?? "-")
}
}