iOS本地推送：如何按指定日期、工作日定时并排除当日已完成目标的通知？

原代码核心问题分析 #

• 无效的星期值：dateComponents.weekday = 2 + 7计算后为9，超出Calendar允许的星期范围（周日=1，周六=7），导致推送永远无法触发。
• 缺少特定时间配置：未设置推送的小时和分钟参数，仅配置了秒数，不符合“特定时间（时、分）调度”的需求。
• 未覆盖工作日范围：当前仅尝试设置单个星期值，无法实现周一到周五的循环推送。
• 缺失目标完成取消逻辑：没有处理用户完成当日目标后取消对应通知的逻辑。

修正后的完整代码 #

import UIKit
import UserNotifications

public extension Date {
    func noon(using calendar: Calendar = .current) -> Date {
        calendar.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }
    func day(using calendar: Calendar = .current) -> Int {
        calendar.component(.day, from: self)
    }
    func weekday(using calendar: Calendar = .current) -> Int {
        calendar.component(.weekday, from: self)
    }
    func hour(using calendar: Calendar = .current) -> Int {
        calendar.component(.hour, from: self)
    }
    func minute(using calendar: Calendar = .current) -> Int {
        calendar.component(.minute, from: self)
    }
    func second(using calendar: Calendar = .current) -> Int {
        calendar.component(.second, from: self)
    }
    func adding(_ component: Calendar.Component, value: Int, using calendar: Calendar = .current) -> Date {
        calendar.date(byAdding: component, value: value, to: self)!
    }
    func monthSymbol(using calendar: Calendar = .current) -> String {
        calendar.monthSymbols[calendar.component(.month, from: self)-1]
    }
    func addDay(n: Int) -> Date {
        let calendar = Calendar.current
        return calendar.date(byAdding: .day, value: n, to: self)!
    }
    
    // 新增：判断当前日期是否为工作日（周一到周五）
    func isWorkday(using calendar: Calendar = .current) -> Bool {
        let weekday = self.weekday(using: calendar)
        return weekday >= 2 && weekday <= 6
    }
}

class ViewController: UIViewController, UNUserNotificationCenterDelegate {
    private let categoryID = "Category"
    // 为每个工作日推送设置唯一ID前缀，方便后续精准取消
    private let notificationIDPrefix = "workday_notification_"
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        UNUserNotificationCenter.current().delegate = self
        let actionShowSomething = UNNotificationAction(identifier: "ShowSomething", title: "查看详情", options: [])
        let category = UNNotificationCategory(identifier: categoryID, actions: [actionShowSomething], intentIdentifiers: [], options: [])
        UNUserNotificationCenter.current().setNotificationCategories([category])
    }
    
    @IBAction func addNotification(_ sender: Any) {
        UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
        UNUserNotificationCenter.current().getNotificationSettings { (notificationSettings) in
            switch notificationSettings.authorizationStatus {
            case .notDetermined:
                self.requestAuthorization(completionHandler: { (success) in
                    guard success else { return }
                    self.scheduleWorkdayNotifications()
                })
            case .authorized:
                self.scheduleWorkdayNotifications()
            case .denied:
                print("应用未被允许显示通知")
            case .provisional, .ephemeral, .@unknown:
                break
            }
        }
    }
    
    private func requestAuthorization(completionHandler: @escaping (_ success: Bool) -> ()) {
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (success, error) in
            if let error = error {
                print("请求通知权限失败：\(error.localizedDescription)")
            }
            completionHandler(success)
        }
    }
    
    // 重构：创建周一到周五的定时推送
    private func scheduleWorkdayNotifications() {
        let notificationContent = UNMutableNotificationContent()
        notificationContent.title = "目标提醒"
        notificationContent.subtitle = "今日目标待完成"
        notificationContent.body = "记得完成今日的目标任务哦！"
        notificationContent.categoryIdentifier = categoryID
        
        let calendar = Calendar.current
        // 设置推送的特定时间（示例为每天18:00，可根据需求修改）
        let targetHour = 18
        let targetMinute = 0
        
        // 遍历周一到周五（对应Calendar的weekday值2-6）
        for weekday in 2...6 {
            var dateComponents = DateComponents()
            dateComponents.calendar = calendar
            dateComponents.weekday = weekday
            dateComponents.hour = targetHour
            dateComponents.minute = targetMinute
            dateComponents.second = 0 // 确保准点触发
            
            // 创建重复触发的推送触发器
            let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
            // 每个工作日的推送设置唯一ID
            let requestID = "\(notificationIDPrefix)\(weekday)"
            let request = UNNotificationRequest(identifier: requestID, content: notificationContent, trigger: trigger)
            
            UNUserNotificationCenter.current().add(request) { (error) in
                if let error = error {
                    print("添加推送请求失败：\(error.localizedDescription)")
                }
            }
        }
    }
    
    // 新增：用户完成当日目标时，取消当日的推送
    func cancelTodayNotification() {
        let calendar = Calendar.current
        let todayWeekday = Date().weekday(using: calendar)
        // 仅工作日需要取消推送
        guard todayWeekday >= 2 && todayWeekday <= 6 else { return }
        
        let targetID = "\(notificationIDPrefix)\(todayWeekday)"
        UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [targetID])
        print("已取消今日的推送通知")
    }
    
    // 确保APP在前台时也能收到通知提示
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert, .sound])
    }
}

关键修正点说明 #

1. 修正星期值范围：使用2-6对应周一到周五，符合Calendar的weekday定义。
2. 添加特定时间配置：设置hour和minute参数，实现指定时分的精准推送。
3. 覆盖工作日推送：遍历周一到周五，为每个工作日创建独立的重复推送请求，确保工作日循环触发。
4. 目标完成取消逻辑：新增cancelTodayNotification()方法，通过当日星期值匹配对应推送ID，精准移除当日待推送请求。
5. 前台通知支持：实现userNotificationCenter:willPresent:withCompletionHandler:方法，确保APP在前台时也能收到通知。

使用说明 #

• 调用addNotification方法即可调度所有工作日的定时推送。
• 用户完成当日目标后，调用cancelTodayNotification方法即可取消当日的推送。

内容的提问来源于stack exchange，提问作者AMIT