关于SWIFT中日程通知工作日设置的问题
我昨天发了这篇文章。
关于SWIFT中待批准的计划通知的问题
幸运的是，昨天的帖子解决了这个问题。(重复触发器的问题)
但我还是把闹钟设在星期一，下午6点40分，然后推到周一，但不是在星期一，韦德。
我试图用另一种方式解决这个问题。
代码：
func scheduleNotification() {
let center = UNUserNotificationCenter.current()
let hour = 6
let minute = 40
let weekdays = [2,3,4] // mon, tue, wed
let content = UNMutableNotificationContent()
content.title = "Fire!!"
content.body = "test.!"
content.badge = 1
content.categoryIdentifier = "alarm"
content.userInfo = ["customData": "fizzbuzz"]
content.sound = UNNotificationSound.default
for weekday in weekdays {
var dateComponents = DateComponents()
dateComponents.hour = hour
dateComponents.minute = minute
dateComponents.weekday = weekday
let date = Calendar.current.date(from: dateComponents)
let triggerWeekly = Calendar.current.dateComponents([.weekday, .hour, .minute], from: date!)
let trigger = UNCalendarNotificationTrigger.init(dateMatching: triggerWeekly, repeats: true)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
center.add(request) { (error) in
if error != nil {
print("error.localizedDescription : ",error?.localizedDescription)
}
}
}
center.getPendingNotificationRequests { (requests) in
for request in requests {
print("trigger: \(request.trigger)")
}
}
}
我想用上面的代码重复一天。但当我把预定的触发器打印到控制台时，
trigger : Optional(<UNCalendarNotificationTrigger: 0x283242f20; dateComponents: <NSDateComponents: 0x2830567a0> {
Hour: 6
Minute: 40
Weekday: 7, repeats: YES>)
trigger : Optional(<UNCalendarNotificationTrigger: 0x283241920; dateComponents: <NSDateComponents: 0x283056900> {
Hour: 6
Minute: 40
Weekday: 7, repeats: YES>)
trigger : Optional(<UNCalendarNotificationTrigger: 0x2832416a0; dateComponents: <NSDateComponents: 0x2830556f0> {
Hour: 6
Minute: 40
Weekday: 7, repeats: YES>)
上面的日志被拿走了。我想要的日志是平日应该是2，3，4，但我不知道为什么7是3倍。帮帮我。
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从你的代码和描述来看，你希望在每周的星期一（2）、星期二（3）和星期三（4）的特定时间（6:40 PM）设置重复提醒。但是，日志显示触发器被设置为星期日（7），并且重复了三次，这显然与你的预期不符。
问题出在你如何构建DateComponents对象并将其转换为日期上。特别地，你直接使用数组中的weekday值来设置dateComponents.weekday，而Swift的周日是从1开始的，所以当你写weekdays = [2,3,4]时，实际上代表的是周二、周三、周四，而不是你期望的周一至周三。但错误在于打印出来的日志显示的是周日（7），这表明问题可能在于日期处理或打印逻辑中。
为了修正这个问题，请确保你在创建DateComponents时正确地映射了weekday值，并且检查你的环境或系统是否有可能影响到weekday值的其他因素。这里是一个修改后的代码示例，明确了weekday的设定，并简化了部分逻辑以提高可读性和准确性：
func scheduleNotification() {
let center = UNUserNotificationCenter.current()
let hour = 6
let minute = 40
let weekdays = [2, 3, 4] // Ensure these are correct for your needs (Mon=2, Tue=3, Wed=4 in Swift)
let content = UNMutableNotificationContent()
content.title = "Fire!!"
content.body = "test.!"
content.badge = 1
content.sound = UNNotificationSound.default
weekdays.forEach { weekday in
var dateComponents = DateComponents()
dateComponents.hour = hour
dateComponents.minute = minute
// In Swift, Sunday is 1 and Saturday is 7, so ensure weekdays are correctly mapped.
// No change needed here since your array already represents Mon to Wed correctly as per Swift's standard.
dateComponents.weekday = weekday
// Safely attempt to get a valid date from components, considering the weekday might not be applicable on the current calendar setup.
if let date = Calendar.current.nextDate(after: Date(), matching: dateComponents, matchingPolicy: .nextTime, direction: .forward, limit: 1) {
let trigger = UNCalendarNotificationTrigger(dateMatching: Calendar.current.dateComponents([.weekday, .hour, .minute], from: date), repeats: true)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
center.add(request) { error in
if let error = error {
print("Error adding notification: \(error.localizedDescription)")
}
}
} else {
print("Unable to find a valid date for weekday: \(weekday)")
}
}
// Fetching pending notifications is good for debugging but not necessary for scheduling.
}
这段代码通过Calendar.current.nextDate(after:matching:matchingPolicy:direction:limit:)方法确保找到下一个符合指定weekday、hour、minute的时间点，这样可以更准确地设置触发器。同时，它也提供了更好的错误处理和日志信息，帮助你调试为何之前会出现不正确的weekday值。
