Unable to Save Picker Result to UserDefaults

Question

I am trying to save the result of a picker to user defaults. The user default save operation occurs in the class UserData via method saveBase.

I have tried a similar tec

Answer 1

In the body you can only use Views - you can't perform operations like:

self.userData.saveBase(baseEntry: self.baseEntry)

You may use onChange to save the value:

Picker(selection: $baseEntry, label: Text("Select Base >")) {
    ForEach(0 ..< self.base.count) {
        Text(self.base[$0]).tag($0)
    }
    .onChange(of: baseEntry) {
        self.userData.saveBase(baseEntry: $0)
    }
}

---

Note that you can also use @AppStorage to automate saving/reading from UserDefaults:

@AppStorage("base") var baseEntry = 0

and use in the Picker in the same way as a @State variable:

Picker(selection: $baseEntry, label: Text("Select Base >")) {