swift - 如何将 isComplate 端的 "true"值中的货币值相加？

Question

我只是在学习 SwiftUI 方面。感谢下面的代码，我设法对所有值求和。但是，我想将货币值(value)与“isComplate = True”值相加。你能帮助我吗？

struct IncomeRow: View {

    //which area where I pull the data
    var todo: TODOS
    
    var body: some View {
        HStack {
            Text(todo.todo)
            Text(todo.category)
            Text("\(todo.money)")
            
            if todo.isComplete == "true" {
                Image(systemName: "checkmark").imageScale(.medium)
            } else {
                Image(systemName: "xmark").imageScale(.medium)
            }
        }
    }
}

//I sum on all values
let totalIncome = self.session.items.map({$0.money}).reduce(0, +) 
let incomePrice = ("$\(totalIncome)")

//isComplate Button Action
func buttonPressed() {
    if complete == true {
        self.complete = false
        self.session.updateTODO(key: todo.key, todo: todo.todo, money: todo.money, isComplete: "false", category: todo.category)
        print("buttonpressed ran, should set complete, complete is: \(String(describing: self.complete))")
    } else {
        self.complete = true
        self.session.updateTODO(key: todo.key, todo: todo.todo, money: todo.money, isComplete: "true", category: todo.category)
        print("buttonpressed ran, should set incomplete, complete is \(String(describing: self.complete))")
    }
} 

Answer 1

您要使用 .filter生成仅包含已完成待办事项的数组，然后对它们求和。类似:let completedTodoIncome = self.session.items.filter { $0.isComplete == "true" }.map {$0.money}.reduce(0, +)使用字符串来表示真/假( bool )值有点奇怪。最好使用 Bool type .