仅当使用EditButton和SwiftUI中的多选功能在列表中选择项目时显示视图

struct ContentView: View {
    
    @State private var itemSelection = Set<String>()

    let names = [ "Orange", "Apple", "Grape", "Watermelon"]

    var body: some View {
        NavigationView {
            VStack{
                List(names, id: \.self, selection: $itemSelection) { name in
                    Text(name)
                }
                .navigationTitle("Item List")
                .toolbar {
                    EditButton()
                }
                
                if !itemSelection.isEmpty {
                    
                    Button("Deselect All"){
                        print("Items: \(itemSelection)")
                        itemSelection.removeAll()
                    }
                    .transition(AnyTransition.move(edge: .bottom))
                    
                }

            }
            .animation(.default, value: itemSelection.isEmpty)
        }
    }
}