Use object property as binding variable

Question

I have a struct called Answer which holds a couple properties, one of which is value: String?. In my SwiftUI app, I ask the user to enter their answer into a textfield from which I'd then like to save the result in the answer object – something like this:

struct Answer {
    var id: Int
    var value: String?
}

var answers: [Answer]!

var body: some View {
    ForEach(answers, id: \.id) { answer in
        TextField("Answer \(id.string) here", text: $answer.value)
    }
}

This doesn't work unfortunately. Error message:

Cannot find '$answer' in scope

What I'd not like to do is create a separate @State variable for each answer, because I'm asking a whole bunch of questions and thus want to save a lot of answers (which I get from an API, so I don't know which / how many answers there will be).

How do I implement such a thing?

With swift 5.5 you can bind variables to each element in the array but in earlier versions I believe looping over the array using indices is the most common solution. See for instance https://stackoverflow.com/questions/57340575/binding-and-foreach-in-swiftui. — Joakim Danielson, Jun 23 '21 at 08:28
you can use class with ObservableObjects protocols, and make answer as @published property. — Tushar Sharma, Jun 23 '21 at 08:30
You can take dynamic TextField reference from here : https://stackoverflow.com/a/67950131/14733292 — Raja Kishan, Jun 23 '21 at 08:33
Awesome, thanks RajaKishan & JoakimDanielson, this is exactly what I was looking for! — LinusGeffarth, Jun 23 '21 at 08:47

Use object property as binding variable

0 Answers0