SwiftUI - 如何访问列表中的数据

Question

我想更改列表中的值。这就是我所拥有的:

struct ExpenseItem {
    let value : String
    let currency : String
    let shopName : String
    let code : String
}

final class Expenses: ObservableObject {
    @Published var items = [ExpenseItem]()
}

我现在如何访问这些数据？用下面的方法是不行的。它说

Value of type '[ExpenseItem]' has no member 'value'

@EnvironmentObject var expenses: Expenses
@State private var value = ""

var body: some View {
        Form() {
            Section(header: Text("Wert")) {
                TextField(self.expenses.items.value, text: $value)

Answer 1

使用ForEach迭代所有项目:

@EnvironmentObject var expenses: Expenses

var body: some View {
    Form() {
        Section(header: Text("Wert")) {
            ForEach(0 ..< self.expenses.items.count) { i in
                TextField(self.expenses.items[i].value, text: self.$expenses.items[i].value)
            }
        }
    }
}