Working with Dynamic Form and field States in SwiftUI - ios

Question

I'm kind of lost on how to work with states with Dynamic forms.
I surely cannot create states for each Field because I don't know how many fields are there as these Forms are basically built from a JSON Response.
Here is basically what I have right now which is what I'm looking to change.
Initially I created a state for each field back when the forms were not built dynamically and now I'm stuck on how to proceed.
I thought about using Dictionary but I ain't sure how good of a solution is that.
#State var textfieldText: String = ""
#State var SKU: String = ""
#State private var showScanner: Bool = false
var currentForm: FormModel
#State var RecordDate: Date = Date.now
#State var Formresponse: [String: Any] = [:]//This one is set to any because the value can vary from a string to [] to even a whole object
How I'm Rendering my form :
ForEach(currentForm.item, id:\.idf) { it in
if (!it.questionItem.hidden)
{
switch it.questionItem.questionType {
case .dateQuestion :
DateField(title: it.title, currentDate: $RecordDate)
case .choiceQuestion:
Text("choice question")
case .scannerQuestion:
ScannerField(title: it.title, SKU: $SKU, showScanner: $showScanner)
case .textQuestion:
TextQuestionField(title: it.title, email: currentForm.owner, text: $textfieldText)
}
}
}
I'll eventually have to submit this data in a form of dictionary which is why I thought about using a Dict ["fieldID":"FieldInput","fieldId2":"FieldInput2"..]

Answer 1

I think you only need one State and that is for the formResponse. You can pass that as a Binding to each input field view and within that view you can create a custom Binding to get and set the answer to the formResponse. Something like this:
struct FormFieldInputView: View {
#Binding var formResponse: [String: Any]
let field: String
var body: some View {
TextField(field, text: Binding(
get: {
formResponse[field] as? String ?? ""
},
set: { newValue in
formResponse[field] = newValue
})
)
}
}

Answer 2

define enum for the questions type:
enum FormItemType {
case dataQuestion
case choiceQuestion
case scannerQuestion
case textQuestion
}
define the item model for the questions type:
struct FormItemModel : Identifiable {
var type : FormItemType
var itemObject : Any
var userInput : String?
let id : UUID
}
define the form view model:
final class FormModel : ObservableObject {
#Published var items : [FormItemModel] = []
}
and the view :
struct ContentView: View {
#ObservedObject var formViewModel: FormModel
#Binding var currentInput : String
var body: some View {
List {
ForEach(formViewModel.items, id: \.id, content: { item in
switch item.type {
case .dataQuestion:
Text(item.itemObject as? String ?? "")
case .scannerQuestion:
Text("\(item.itemObject as? Int ?? 0 )")
case .choiceQuestion:
if let dic = item.itemObject as? [String:String]{
VStack{
Text(dic["Q"]!)
Text(dic["A1"]!)
Text(dic["A2"]!)
Text(dic["A3"]!)
}
}
case .textQuestion:
VStack{
Text(item.itemObject as? String ?? "")
TextEditor(text: $currentInput)
}
}
})//ForEach
}//List
}
}//View
and here's the dummy values for the form:
items = [FormItemModel(type: .textQuestion, itemObject: "Tell Me About Yourself...", id: UUID()),
FormItemModel(type: .choiceQuestion,
itemObject: ["Q":"How much is 1+1?", "A1":"1", "A2":"2", "A3":"3"],
id: UUID()),
FormItemModel(type: .scannerQuestion, itemObject: 1110111011, id: UUID())
]
and the result: