So straight to the point i have this code:
struct DataModel {
var option: String
}
struct ViewModel {
var selected: String? = "1"
var options = [DataModel(option: "1"), DataModel(option: "2"), DataModel(option: "3")]
}
struct ContentView: View {
@State var viewModel: ViewModel
var body: some View {
VStack {
Picker("test", selection: aBinder()) {
ForEach(viewModel.options, id: \.option) { option in
Text(option.option)
}
}
.background(Color.red)
}
}
func aBinder() -> Binding<String?> {
Binding<String?> {
viewModel.selected
} set: { value in
$viewModel.selected.wrappedValue = value
print($viewModel.selected.wrappedValue)
}
}
}
The value of "selected" in the viewModel doesn't change.
This works:
struct DataModel {
var option: String
}
struct ViewModel {
var selected: String = "1"
var options = [DataModel(option: "1"), DataModel(option: "2"), DataModel(option: "3")]
}
struct ContentView: View {
@State var viewModel: ViewModel
var body: some View {
VStack {
Picker("test", selection: $viewModel.selected) {
ForEach(viewModel.options, id: \.option) { option in
Text(option.option)
}
}
Button("press me", action: { print(viewModel.selected) })
}
}
}
But that doesn't make any sense. in both cases i use a binding to store the current value. What is going on? I'm pretty new to swiftUI so i might have missed how something works.
Thanks in advance
The types don’t match selected
is a String
and the options
are a DataModel
. The types have to match exactly.