import SwiftUI struct ListAddItemView: View { @State var products = ["手機","電腦","水杯"] @State var pName:String = "" var body: some View { VStack{ TextField("新商品:",text: self.$pName) Button(action:{ print("hello") if (self.pName != "") { self.products.append(self.pName) self.pName = "" } }){ Text("添加一個商品") } List(products,id:\.self){ item in Text(item) } } } }