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annotate LazyBear/Watchlist.swift @ 468:99313ca94e8b

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Update README.md committer: GitHub <noreply@github.com>
author Dennis C. M. <dennis@denniscm.com>
date Tue, 12 Dec 2023 09:01:01 +0000
parents 6953d83060a4
children
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1 //
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2 // Watchlist.swift
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3 // lazybear
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4 //
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5 // Created by Dennis Concepción Martín on 17/07/2021.
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6 //
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7
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8 import SwiftUI
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9 import CoreData
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10
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11 struct Watchlist: View {
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12 @Environment(\.managedObjectContext) private var viewContext
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13 @FetchRequest(
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14 sortDescriptors: [NSSortDescriptor(keyPath: \Company.symbol, ascending: true)],
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15 animation: .default)
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16 private var companies: FetchedResults<Company>
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17
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18 var body: some View {
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19 List {
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20 ForEach(companies) { company in
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21 NavigationLink(destination: CompanyView(symbol: company.symbol)) {
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22 WatchlistRow(symbol: company.symbol)
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23 }
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24 }
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25 .onDelete(perform: deleteCompanyFromWatchlist)
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26 }
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27 .navigationTitle("Companies")
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28 .toolbar {
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29 #if os(iOS)
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30 EditButton()
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31 #endif
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32 }
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33 .if(UIDevice.current.userInterfaceIdiom == .phone) { content in
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34 NavigationView { content }
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35 }
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36 }
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37
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38 private func deleteCompanyFromWatchlist(offsets: IndexSet) {
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39 withAnimation {
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40 offsets.map { companies[$0] }.forEach(viewContext.delete)
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41
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42 do {
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43 try viewContext.save()
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44 } catch {
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45 let nsError = error as NSError
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46 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
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47 }
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48 }
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49 }
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50 }
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51
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52 struct Watchlist_Previews: PreviewProvider {
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53 static var previews: some View {
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54 Watchlist()
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55 .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
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56 }
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57 }