List in SwiftUI Deleting and Reappearing-CodePudding

Whenever I try delete an item from the list it automatically pops back up again, however the list itself does update and delete (I checked with a print statement). When I close the app and re-open it, it has deleted, but it won't delete immediately, is there something I am missing or have not spotted that anyone else can?

NavigationView {
    VStack {
        List {
            ForEach(UserDefaults.standard.stringArray(forKey: "names")!, id: \.self) { name in
                Group {
                    NavigationLink(destination: PersonView(name: name)) {
                        Text(name)
                    }
                }
            }.onDelete(perform: delete)
        }.navigationBarTitle("Names")
    }
}

The Delete function:

func delete(at offsets: IndexSet) {
    names.remove(atOffsets: offsets)
    UserDefaults.standard.set(names, forKey: "names")
}

The 'names' variable is declared further up as

@State public var names: [String] = []

that updates every time a new name is added (this works). And the new name also gets added to User Defaults (this also works).

CodePudding user response：

Just use names in your ForEach and load them using onAppear method. Something like:

NavigationView {
    VStack {
        List {
            ForEach(names, id: \.self) { name in
                Group {
                    NavigationLink(destination: PersonView(name: name)) {
                        Text(name)
                    }
                }
            }.onDelete(perform: delete)
        }.navigationBarTitle("Names")
    }
}.onAppear{
    names = UserDefaults.standard.stringArray(forKey: "names") ?? []
}