本地通知周期重复调度错误及自定义重复规则实现求助

一、修复原代码中的dateComponents错误 #

你当前的dateComponents配置逻辑存在问题，导致重复通知无法正确触发，以下是各重复类型的正确配置逻辑：

• .never（不重复）：需精确到具体年月日时分，确保通知仅触发一次
• .everyDay（每天重复）：只保留hour和minute，这样每天到对应时间就会触发，无需限定具体日期
• .everyWeek（每周重复）：保留weekday、hour、minute，按星期几的固定时间重复，不需要day（否则会限定每月某一天，而非星期几）
• .everyMonth（每月重复）：保留day（每月的几号）、hour、minute，不需要weekday（每月固定日期重复，与星期几无关）
• .everyYear（每年重复）：保留month、day、hour、minute，不需要weekday

二、实现自定义星期重复（如周一、周二、周五） #

UNCalendarNotificationTrigger不支持直接设置多个星期几的重复规则，解决方案是为每个需要重复的星期几单独创建通知请求，每个请求的trigger匹配对应星期几，重复开关设为true。
注意：Calendar.current中，周日为1，周一为2，周二为3……周六为7；需确保每个通知请求的identifier唯一，避免被覆盖。

修改后的完整代码 #

let addRequest = {
    let content = UNMutableNotificationContent()
    
    if !reminder.title.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
        content.title = reminder.title
    } else {
        content.title = "New Reminder"
    }
    
    content.subtitle = reminder.stringDate
    content.sound = UNNotificationSound.defaultRingtone
    
    let calendar = Calendar.current
    var alertOptionTime = 0.0
    
    switch alertOption {
    case .noAlerts:
        fatalError("You messed up")
    case .atTimeOfEvent:
        alertOptionTime = 0
    case .fiveMinutes:
        alertOptionTime = -300
    case .tenMinutes:
        alertOptionTime = -600
    case .fifteenMinutes:
        alertOptionTime = -900
    case .thirtyMinutes:
        alertOptionTime = -1800
    case .oneHour:
        alertOptionTime = -3600 // 原代码数值错误，修正为标准1小时间隔
    case .twoHours:
        alertOptionTime = -7200 // 原代码数值错误，修正为标准2小时间隔
    case .oneDay:
        alertOptionTime = -86400
    case .twoDay:
        alertOptionTime = -172800
    case .oneWeek:
        alertOptionTime = -604800
    }
    
    let targetDate = reminder.date.addingTimeInterval(alertOptionTime)
    
    switch reminder.repeating {
    case .never:
        let components = calendar.dateComponents([.year, .month, .day, .hour, .minute], from: targetDate)
        let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: false)
        let request = UNNotificationRequest(identifier: reminder.id.uuidString, content: content, trigger: trigger)
        self.center.add(request)
        
    case .everyDay:
        let components = calendar.dateComponents([.hour, .minute], from: targetDate)
        let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: true)
        let request = UNNotificationRequest(identifier: reminder.id.uuidString + "_daily", content: content, trigger: trigger)
        self.center.add(request)
        
    case .everyWeek:
        let components = calendar.dateComponents([.weekday, .hour, .minute], from: targetDate)
        let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: true)
        let request = UNNotificationRequest(identifier: reminder.id.uuidString + "_weekly", content: content, trigger: trigger)
        self.center.add(request)
        
    case .everyMounth: // 建议修正枚举名为everyMonth，避免拼写错误
        let components = calendar.dateComponents([.day, .hour, .minute], from: targetDate)
        let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: true)
        let request = UNNotificationRequest(identifier: reminder.id.uuidString + "_monthly", content: content, trigger: trigger)
        self.center.add(request)
        
    case .everyYear:
        let components = calendar.dateComponents([.month, .day, .hour, .minute], from: targetDate)
        let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: true)
        let request = UNNotificationRequest(identifier: reminder.id.uuidString + "_yearly", content: content, trigger: trigger)
        self.center.add(request)
        
    case .custom:
        // 自定义星期重复：示例为周一(2)、周二(3)、周五(6)，可替换为用户选择的数值
        let targetWeekdays = [2, 3, 6]
        let baseComponents = calendar.dateComponents([.hour, .minute], from: targetDate)
        
        for (index, weekday) in targetWeekdays.enumerated() {
            var customComponents = baseComponents
            customComponents.weekday = weekday
            
            let trigger = UNCalendarNotificationTrigger(dateMatching: customComponents, repeats: true)
            // 为每个星期几的通知设置唯一ID，避免覆盖
            let requestId = reminder.id.uuidString + "_custom_\(index)"
            let request = UNNotificationRequest(identifier: requestId, content: content, trigger: trigger)
            self.center.add(request)
        }
    }
}

额外注意点 #

1. 原代码中oneHour和twoHours的时间间隔数值错误，已修正为标准的3600秒和7200秒
2. 枚举名everyMounth存在拼写错误，建议修正为everyMonth，降低后续维护风险
3. 自定义重复时，务必保证每个通知请求的identifier唯一，防止旧通知被新通知覆盖

内容的提问来源于stack exchange，提问作者Nikita Kolomoec