Fetch Api Data SwiftUI - api

Question

I need to add author_id to the api so that it can give me all the articles of the author.
Here in SelectedAuthorView, I fetch related authorPost. In this authorPost it has author_id as well.
Below is my SelectedAuthorView, here I tried to fetch api data but first I do not want to fetch api inside the view. Second I do not know how to transfer this selected authorPost to my AuthorService
struct SelectedAuthorView: View {
var authorPost: AuthorPost
var body: some View {
NavigationView {
VStack {
AuthorListElementView(authorPost: authorPost)
if let selectedAuthorUrl = URL(string:"http://xxxx\(authorPost.author_id)/") {
let session = URLSession(configuration: .default)
var request = URLRequest(url: selectedAuthorUrl)
request.httpMethod = "GET"
do {
request.httpBody = try JSONSerialization.data(withJSONObject: Any, options: .prettyPrinted)
} catch let error {
print(error.localizedDescription)
}
}
}
}
}
}
}
Also this is the api I need to fetch data from [![enter image description here][1]][1]
Help is needed to be able to fetch data from that api.

Answer 1

You can use a ViewModel : ObservableObject
And your code will be like that :
The viewModel :
class ViewModel : ObservableObject {
func fetchData(authorPost: AuthorPost){
if let selectedAuthorUrl = URL(string:"http://yazar.io/api/author/article/list/\(authorPost.author_id)/") {
let session = URLSession(configuration: .default)
var request = URLRequest(url: selectedAuthorUrl)
request.httpMethod = "GET"
do {
request.httpBody = try JSONSerialization.data(withJSONObject: Any, options: .prettyPrinted)
} catch let error {
print(error.localizedDescription)
}
}
}
}
.
struct SelectedAuthorView: View {
var authorPost: AuthorPost
#ObservedObject var viewModel = ViewModel()
var body: some View {
NavigationView {
VStack {
AuthorListElementView(authorPost: authorPost)
}
}.onAppear{
self.viewModel.fetchData(authorPost:authorPost)
}
}
}
}