ios – Does anybody know why Picker from my view file will not settle for the binding model of an observable object property utilizing @Observable

The error can not discover '$settingsViewModel' in scope is as a result of Picker requires a binding for its choice parameter. Once you use a var settingsViewModel : SettingsViewModel = .init(), you do not get a binding to your mannequin.

Whereas @State does get you a binding, it ought to solely be used if it is thought of to be the proprietor of the thing. In any other case, if the proprietor is a mum or dad view, you may settle for it as a Binding in your baby view or when utilizing @Observable, you may settle for it as an object and get a binding to it in your baby view, utilizing @Bindable.

Notice: Since your code wasn’t reproducible because of missing the DataHandler class and the ColorOptionEnum, I commented it out within the instance code beneath and added a pattern enum to make it work:

import Basis
import SwiftUI

enum ColorOptionEnum {
    case inexperienced, blue, orange // <- circumstances must be lowercased
    
    var shade: Shade {
        change self {
            case .inexperienced: return .inexperienced
            case .blue: return .blue
            case .orange: return .orange
        }
    }
}

@Observable
class DemoSettings {
    
    var currentSelection : ColorOptionEnum = .inexperienced
    // var dataHandler : DataHandler
    
    // init() {
    // let localdataHandler: DataHandler = .init()
    // currentSelection = localdataHandler.currentBibleVersion
    // dataHandler = localdataHandler
    // }
}

//Guardian view
struct DemoSettingsRootView: View {
    
    //State worth
    @State personal var demoSettings = DemoSettings() // <- Guardian view owns the settings object
    
    //Physique
    var physique: some View {
        
        DemoSettingsView(settings: demoSettings) // <- Settings handed to baby view as an (observable) object
        
    }
}

//Little one view
struct DemoSettingsView: View {
    
    //Parameters
    var settings : DemoSettings // <- settings accepted from mum or dad as an object
    
    //Physique
    var physique: some View {
        
        @Bindable var settings = settings // <- Right here, get a binding to the observable settings object
        
        Textual content("Chosen mode: (String(describing: settings.currentSelection).capitalized)")
            .foregroundStyle(settings.currentSelection.shade)
        
        Type {
            Picker("Mode", choice: $settings.currentSelection) { // <- use the binding for the choice parameter
                Textual content("Inexperienced")
                    .tag(ColorOptionEnum.inexperienced)
                Textual content("Blue")
                    .tag(ColorOptionEnum.blue)
            }
        }
    }
}

#Preview {
    DemoSettingsRootView()
}