所以我在下面ObservableObject的@ObservableObject var dataSource = DataSource()调用旁边收到错误Unknown属性。在ObservableObject完美地工作，几天前在另一个项目，但现在不是了。
import SwiftUI
import Combine
class DataSource: ObservableObject {
var willChange = PassthroughSubject<Void,Never>()
var expenses = [Expense]() {
willSet { willChange.send() }
}
var savingsItems = [SavingsItem](){
willSet { willChange.send() }
}
//@State var monthlyIncomeText: String
//var monthlyIncome: Int = 1364
init(){
addNewExpense(withName: "Spotify", price: 14)
}
func addNewExpense(withName name: String, price: Int){
let newExpense = Expense(name: name, price: price)
expenses.append(newExpense)
}
func addNewSavingsItem(withName name: String, price: Int, percentage: Double){
let newSavingsItem = SavingsItem(name: name, price: price, timeTilCompletion: 0, percentage: percentage)
savingsItems.append(newSavingsItem)
}
}
struct ContentView: View {
@ObservableObject var dataSource = DataSource()
var body: some View {
VStack{
Text("Expenses")
List(dataSource.expenses) { expense in
ExpenseRow(expense: expense)
}
}
}
}
有人可以帮忙吗？
ObservableObject是ObservedObjects必须遵守的协议。见这里关于文档ObservableObject，并在这里对文档ObservedObject，这是物业的包装，你正在寻找。将ContentView代码更改为此：
struct ContentView: View {
@ObservedObject var dataSource = DataSource()
var body: some View {
VStack {
Text("Expenses")
List(dataSource.expenses) { expense in
ExpenseRow(expense: expense)
}
}
}
}
本文收集自互联网，转载请注明来源。
如有侵权，请联系 [email protected] 删除。
我来说两句