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ContentView.swift
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ContentView.swift
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//
// ContentView.swift
// P07E iExpense
//
// Created by Julian Moorhouse on 12/02/2021.
//
import SwiftUI
struct ExpenseItem: Identifiable, Codable {
var id = UUID()
let name: String
let type: String
let amount: Int
}
class Expenses: ObservableObject {
@Published var items = [ExpenseItem]() {
didSet {
let encoder = JSONEncoder()
if let encoded = try? encoder.encode(items) {
UserDefaults.standard.set(encoded, forKey: "Items")
}
}
}
init() {
if let items = UserDefaults.standard.data(forKey: "Items") {
let decoder = JSONDecoder()
if let decoded = try? decoder.decode([ExpenseItem].self, from: items) {
self.items = decoded
return
}
}
self.items = []
}
}
struct ContentView: View {
@ObservedObject var expenses = Expenses()
@State private var showingAddExpense = false
var body: some View {
NavigationView {
VStack {
List {
ForEach(expenses.items) { item in
HStack {
VStack(alignment: .leading) {
Text(item.name)
.font(.headline)
Text(item.type)
}
Spacer()
Text("$\(item.amount)")
.foregroundColor(item.amount < 10 ?
Color.gray :
item.amount > 100 ?
Color.blue :
Color.black)
}
}
.onDelete(perform: removeItems)
}
.navigationTitle("iExpense")
.navigationBarItems(leading: EditButton(),
trailing:
Button(action: {
self.showingAddExpense = true
}) {
Image(systemName: "plus")
})
.sheet(isPresented: $showingAddExpense) {
AddView(expenses: self.expenses)
}
}
}
}
func removeItems(at offsets: IndexSet) {
expenses.items.remove(atOffsets: offsets)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}