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comparison Simoleon/ContentView.swift @ 183:d2398f02e1ce

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implement unit currency selector
author Dennis Concepcion Martin <dennisconcepcionmartin@gmail.com>
date Mon, 20 Dec 2021 12:28:16 +0100
parents ba3ebe8cefe5
children 1ebd1c5dd302
comparison
equal deleted inserted replaced
182:ba3ebe8cefe5 183:d2398f02e1ce
4 // 4 //
5 // Created by Dennis Concepción Martín on 8/12/21. 5 // Created by Dennis Concepción Martín on 8/12/21.
6 // 6 //
7 7
8 import SwiftUI 8 import SwiftUI
9 import CoreData
10 9
11 struct ContentView: View { 10 struct ContentView: View {
12 @Environment(\.managedObjectContext) private var viewContext 11 @State private var tab: Tab = .convert
12
13 private enum Tab {
14 case convert, favorites, settings
15 }
16
17 @ViewBuilder var adjustedView: some View {
18 if UIDevice.current.userInterfaceIdiom == .pad {
19 NavigationView {
20
21 }
22 } else {
23 TabView(selection: $tab) {
24 ConversionView()
25 .tabItem {
26 Label("Convert", systemImage: "arrow.counterclockwise.circle")
27 }
28 .tag(Tab.convert)
29
30 Text("Favorites View")
31 .tabItem {
32 Label("Favorites", systemImage: "star")
33 }
34 .tag(Tab.favorites)
13 35
14 @FetchRequest( 36 Text("About View")
15 sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)], 37 .tabItem {
16 animation: .default) 38 Label("About", systemImage: "info.circle")
17 private var items: FetchedResults<Item>
18
19 var body: some View {
20 NavigationView {
21 List {
22 ForEach(items) { item in
23 NavigationLink {
24 Text("Item at \(item.timestamp!, formatter: itemFormatter)")
25 } label: {
26 Text(item.timestamp!, formatter: itemFormatter)
27 } 39 }
28 } 40 .tag(Tab.settings)
29 .onDelete(perform: deleteItems)
30 }
31 .toolbar {
32 ToolbarItem(placement: .navigationBarTrailing) {
33 EditButton()
34 }
35 ToolbarItem {
36 Button(action: addItem) {
37 Label("Add Item", systemImage: "plus")
38 }
39 }
40 }
41 Text("Select an item")
42 }
43 }
44
45 private func addItem() {
46 withAnimation {
47 let newItem = Item(context: viewContext)
48 newItem.timestamp = Date()
49
50 do {
51 try viewContext.save()
52 } catch {
53 // Replace this implementation with code to handle the error appropriately.
54 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
55 let nsError = error as NSError
56 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
57 } 41 }
58 } 42 }
59 } 43 }
60 44
61 private func deleteItems(offsets: IndexSet) { 45 var body: some View {
62 withAnimation { 46 adjustedView
63 offsets.map { items[$0] }.forEach(viewContext.delete)
64
65 do {
66 try viewContext.save()
67 } catch {
68 // Replace this implementation with code to handle the error appropriately.
69 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
70 let nsError = error as NSError
71 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
72 }
73 }
74 } 47 }
75 } 48 }
76 49
77 private let itemFormatter: DateFormatter = {
78 let formatter = DateFormatter()
79 formatter.dateStyle = .short
80 formatter.timeStyle = .medium
81 return formatter
82 }()
83 50
84 struct ContentView_Previews: PreviewProvider { 51 struct ContentView_Previews: PreviewProvider {
85 static var previews: some View { 52 static var previews: some View {
86 ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) 53 ContentView()
87 } 54 }
88 } 55 }