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Day 59, Project 12, Challenge 2

Forums > 100 Days of SwiftUI

Hi im getting errors in ContentView in ForEach lines. What do you think is wrong here?

import SwiftData
import SwiftUI

struct ContentView: View {

    @State private var items: ExpenseItem

    @Environment(\.modelContext) var modelContext

    @State private var sortOrder = [

        SortDescriptor(\ExpenseItem.name),
        SortDescriptor(\ExpenseItem.amount)

    ]

    @State private var showingAddExpense = false

    var body: some View {
        NavigationView {
            List {
                Section(header: Text("Personal")) {
                    ForEach(items.filter { $0.type == "Personal" }) { item in
                        ExpenseRow(item: item)
                    }
                }

                Section(header: Text("Business")) {
                    ForEach(items.filter { $0.type == "Business" }) { item in
                        ExpenseRow(item: item)
                    }
                }
            }
            .navigationTitle("iExpense")
            .toolbar {
                Button {
                    showingAddExpense.toggle()
                } label: {
                    Image(systemName: "plus")
                }
                Menu("Sort", systemImage: "arrow.up.arrow.down") {
                    Picker("Sort", selection: $sortOrder) {
                        Text("Dort by name")
                            .tag([
                                SortDescriptor(\ExpenseItem.name),
                                SortDescriptor(\ExpenseItem.amount)
                            ])

                        Text("Dort by Amount")
                            .tag([
                                SortDescriptor(\ExpenseItem.amount),
                                SortDescriptor(\ExpenseItem.name)
                            ])
                    }
                }
                }
            }
            .sheet(isPresented: $showingAddExpense) {
                AddView()
            }

        }
    }

struct ExpenseRow: View {
    var item: ExpenseItem

    var body: some View {
        HStack {
            VStack(alignment: .leading) {
                Text(item.name)
                    .font(.headline)
                Text(item.type)
            }

            Spacer()

            Text(item.amount, format: .currency(code: "PLN"))
                .customStyle(item.amount)
        }
    }
}

extension Text {
    func customStyle(_ amount: Double) -> Text {
        switch amount {
        case ..<10.0:
            return foregroundStyle(.green)
        case ..<100.0:
            return foregroundStyle(.blue)
        default:
            return foregroundStyle(.red)
        }
    }
}

2      

Can anyone give me some tips here? :)

2      

Firstly, item @State private var items: ExpenseItem declares a single ExpenseItem instead of a list of expense items so using ForEach with a single ExpenseItem won't work here, you'll want to declare an array instead. @State private var items: [ExpenseItem]

Secondly, as you are now rebuilding this project with SwiftData, instead, you should query your model object using @Query. So something like @Query var items: [ExpenseItem]

Hope this helps!

2      

In the ContentView. It's declared as a single ExpenseItem instead of an array of ExpenseItem. The ForEach expects a collection, but you are providing a single instance of ExpenseItem. so fix that using

@State private var items : [ExpenseItem]

2      

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