Append things to Array at launching

Question

Konste4sfi OP

Created Nov ’20

Replies 1

Boosts 0

Participants 2

Hi have a question to the following code:

Code Block Swiftstruct ContentView: View {
   
 
   
  @State private var listItems = [Item]()
  let savedItems = UserDefaults.standard.string(forKey: "Items") ?? "error"
  var body: some View {
    NavigationView{
       
         
         
        List{
          ForEach(listItems){ item in
            Text(item.name)
               
               
          }
          NavigationLink(
            destination: AddView(listItems: $listItems),
            label: {
              Text("                 Add")
                .foregroundColor(.blue)
            })
        }
         
       
       
         
       
         
    .navigationBarTitle("MyApp")
    }
     
  }
}

Code Block Swiftstruct AddView: View {
  @State var text:String = ""
  @Binding var listItems: [Item]
  var body: some View {
     
    VStack{
      TextField("Name", text: $text).padding().background(Color(.systemGray5)).frame(width: 400,alignment: .center).cornerRadius(20)
       
       
       
      Button(action: {
        listItems.append(Item(name: text, image: "Gif"))
        print(listItems)
        UserDefaults.standard.set(listItems, forKey: "Items")
         
         
      }, label: {
        Text("Add")
      })
    }
  }
}

If i append something in the AddView, i want to save it in the UserDefaults and append it automatically when the app starts. But I don't know how to do this. Can you help me ?
PS: I'm using AppDelegate and SceneDelegate.

Answered by BabyJ in 649932022

You are saving the listItems like this

Code Block SwiftUserDefaults.standard.set(listItems, forKey: "Items")

which means you can load this array on launch like this

Code Block Swift.onAppear { listItems = (UserDefaults.standard.array(forKey: "Items") ?? [Item]()) as [Item] }

Boost

Answer 1

BabyJ OP

Nov ’20

Accepted Answer

You are saving the listItems like this

Code Block SwiftUserDefaults.standard.set(listItems, forKey: "Items")

which means you can load this array on launch like this

Code Block Swift.onAppear { listItems = (UserDefaults.standard.array(forKey: "Items") ?? [Item]()) as [Item] }

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