How can I read json from url, output to app screen? SwiftUI - json

Question

I`m new at swift and need to read json file from url. I managed to get the data and output it to the console, but how can I get it to the application screen?
import SwiftUI
struct User: Codable {
let Login: String
let Password: String
}
struct AllTEC: View {
var body: some View {
Text("asd").onAppear(perform: loadD)
}
}
extension AllTEC
{
func loadD() {
let url = URL(string: "https://symbiosys-a415a.firebaseio.com/USER.json")!
let task = URLSession.shared.dataTask(with: url) { data, response, error in
guard error == nil else {
print("error: \(error!)")
return
}
guard let data = data else{
print("no data")
return
}
guard let user = try? JSONDecoder().decode(User.self, from: data) else {
print("Error: Couldn't decode data ito user")
return
}
print("gotten user is \(user.Login)")
}
task.resume()
}
}
struct AllTEC_Previews: PreviewProvider {
static var previews: some View {
AllTEC()
}
}
The json structure is pretty simple.
{
"Login":"Kapitan",
"Password":"M3030"
}

Answer 1

Simply make a #State variable user for storing the returned User in AllTEC.
struct AllTEC: View {
#State var user: User?
var body: some View {
Text("Login: \(user?.Login ?? "")")
.onAppear(perform: loadD)
}
}
And set user right after you decode it in the network call:
print("gotten user is \(user.Login)")
DispatchQueue.main.async {
self.user = user
}