Salary Per Second

ContentView.swift

import Combine
import SwiftUI

struct ContentView: View {
    @State private var salary = "20000"
    @State private var days = "21"
    @State private var hours = "8"
    @State private var startedAt: Date?
    @State private var now = Date()
    @State private var showSummary = false
    @State private var finalEarned = 0.0
    @State private var finalAverage = 0.0
    @FocusState private var focusedField: Field?

    private let timer = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect()

    private var monthSalary: Double { Double(salary) ?? 0 }
    private var workDays: Double { Double(days) ?? 0 }
    private var workHours: Double { Double(hours) ?? 0 }
    private var daySalary: Double { workDays > 0 ? monthSalary / workDays : 0 }
    private var planSeconds: Double { workHours * 3600 }
    private var elapsed: Double {
        guard let startedAt else { return 0 }
        return max(0, now.timeIntervalSince(startedAt))
    }
    private var earned: Double {
        guard planSeconds > 0 else { return 0 }
        return daySalary * min(elapsed, planSeconds) / planSeconds
    }
    private var average: Double {
        guard elapsed > 0 else { return planSeconds > 0 ? daySalary / planSeconds : 0 }
        return earned / elapsed
    }
    private var canStart: Bool { monthSalary > 0 && workDays > 0 && workHours > 0 }
    private enum Field { case salary, days, hours }

    var body: some View {
        ZStack {
            VStack(spacing: 8) {
                TextField("请输入税前月薪", text: $salary)
                    .focused($focusedField, equals: .salary)
                TextField("本月上班天数", text: $days)
                    .focused($focusedField, equals: .days)
                TextField("每日工作小时数", text: $hours)
                    .focused($focusedField, equals: .hours)
                Button(startedAt == nil ? "上班打卡" : "下班打卡") {
                    startedAt == nil ? start() : stop()
                }
                .controlSize(.large)
                .disabled(startedAt == nil && !canStart)

                Text("今日已赚金额：\(money(earned))")
                Text("秒均金额：\(money(average))")
            }
            .disabled(showSummary)

            if showSummary {
                VStack(spacing: 10) {
                    Text("恭喜你")
                    Text("今天赚了 \(money(finalEarned))")
                    Text("平均每秒 \(money(finalAverage))")
                    Button("返回") {
                        showSummary = false
                    }
                    .controlSize(.large)
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(.background)
                .zIndex(1)
            }
        }
        .textFieldStyle(.roundedBorder)
        .controlSize(.small)
        .font(.system(size: 16))
        .frame(width: 220)
        .padding(10)
        .onReceive(timer) { date in
            if startedAt != nil { now = date }
        }
    }

    private func start() {
        now = Date()
        startedAt = now
        focusedField = nil
        showSummary = false
    }

    private func stop() {
        focusedField = nil
        now = Date()
        finalEarned = earned
        finalAverage = average
        startedAt = nil
        showSummary = true
    }

    private func money(_ value: Double) -> String {
        "¥" + value.formatted(.number.precision(.fractionLength(4)))
    }
}

#Preview {
    ContentView()
}