A notes app written in <100 lines of swift using SwiftUI

import SwiftUI

let dateFormatter = DateFormatter()

struct NoteItem: Codable, Hashable, Identifiable { let id: Int let text: String var date = Date() var dateText: String { dateFormatter.dateFormat = "MMM d yyyy, h:mm a" return dateFormatter.string(from: date) } }

struct ContentView : View { @State var items: [NoteItem] = { guard let data = UserDefaults.standard.data(forKey: "notes") else { return [] } if let json = try? JSONDecoder().decode([NoteItem].self, from: data) { return json } return [] }()

@State var taskText: String = ""

@State var showAlert = false

@State var itemToDelete: NoteItem?

var alert: Alert {
    Alert(title: Text("Hey!"),
          message: Text("Are you sure you want to delete this item?"),
          primaryButton: .destructive(Text("Delete"), action: deleteNote),
          secondaryButton: .cancel())
}

var inputView: some View {
    HStack {
        TextField("Write a note ...", text: $taskText)
            .padding(EdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16))
            .clipped()
        Button(action: didTapAddTask, label: { Text("Add") }).padding(8)
    }
}

var body: some View {
    VStack {
        inputView
        Divider()
        List(items) { item in
            VStack(alignment: .leading) {
                Text(item.dateText).font(.headline)
                Text(item.text).lineLimit(nil).multilineTextAlignment(.leading)
            }
            .onLongPressGesture {
                self.itemToDelete = item
                self.showAlert = true
            }
        }
        .alert(isPresented: $showAlert, content: {
            alert
        })
    }
}

func didTapAddTask() {
    let id = items.reduce(0) { max(\$0, \$1.id) } + 1
    items.insert(NoteItem(id: id, text: taskText), at: 0)
    taskText = ""
    save()
}

func deleteNote() {
    guard let itemToDelete = itemToDelete else { return }
    items = items.filter { \$0 != itemToDelete }
    save()
}

func save() {
    guard let data = try? JSONEncoder().encode(items) else { return }
    UserDefaults.standard.set(data, forKey: "notes")
}

}