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A notes app written in >100 lines of swift using SwiftUI
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// | |
// ContentView.swift | |
// Listomania | |
// | |
// Created by Jack Newcombe on 05/06/2019. | |
// Copyright © 2019 Jack Newcombe. All rights reserved. | |
// | |
import SwiftUI | |
let dateFormatter = DateFormatter() | |
struct NoteItem: Codable, Hashable, Identifiable { | |
let id: Int | |
let text: String | |
private let 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"), onTrigger: deleteNote), | |
secondaryButton: .cancel()) | |
} | |
var inputView: some View { | |
HStack { | |
TextField($taskText, placeholder: Text("Write a note ...")) | |
.padding(EdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16)) | |
.clipped() | |
Button(action: didTapAddTask, label: { Text("Add") }).padding(8) | |
} | |
} | |
var body: some View { | |
VStack { | |
inputView | |
Divider() | |
List(items) { item in | |
VStack(alignment: .leading) { | |
Text(item.dateText).font(.headline) | |
Text(item.text).lineLimit(nil).multilineTextAlignment(.leading) | |
} | |
.longPressAction({ | |
self.itemToDelete = item | |
self.showAlert = true | |
}) | |
} | |
.presentation($showAlert) { alert } | |
} | |
} | |
func didTapAddTask() { | |
let id = items.reduce(0) { max($0.id, $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") | |
} | |
} | |
#if DEBUG | |
struct ContentView_Previews : PreviewProvider { | |
static var previews: some View { | |
ContentView() | |
} | |
} | |
#endif |
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