我似乎无法找到任何关于这个确切场景的 Apple 文档,而且我已经尝试了各种方法来做到这一点,但我总是一无所获。
我想安排一个重复通知(iOS 10+
所以 UNCalendarNotificationTrigger
或等效的)。
这些是本地通知不是推送通知。
我的目标:
安排重复的通知:
- 每两周一次(例如,每第二星期二)
- 每季度一次(例如,每 3 个月的第一天)
我目前的做法:
这些触发器运行良好,并且易于实现(在 Swift Playground 中运行代码)。
// Every day at 12pm
var daily = DateComponents()
daily.hour = 12
let dailyTrigger = UNCalendarNotificationTrigger(dateMatching: daily, repeats: true)
dailyTrigger.nextTriggerDate() // "Jan 4, 2017, 12:00 PM"
// Every Tuesday at 12pm
var weekly = DateComponents()
weekly.hour = 12
weekly.weekday = 3
let weeklyTrigger = UNCalendarNotificationTrigger(dateMatching: weekly, repeats: true)
weeklyTrigger.nextTriggerDate() // "Jan 10, 2017, 12:00 PM"
// The 1st of every month at 12pm
var monthly = DateComponents()
monthly.hour = 12
monthly.day = 1
let monthlyTrigger = UNCalendarNotificationTrigger(dateMatching: monthly, repeats: true)
monthlyTrigger.nextTriggerDate() // "Feb 1, 2017, 12:00 PM"
// Every 1st of February at 12pm
var yearly = DateComponents()
yearly.hour = 12
yearly.day = 1
yearly.month = 2
let yearlyTrigger = UNCalendarNotificationTrigger(dateMatching: yearly, repeats: true)
yearlyTrigger.nextTriggerDate() // "Feb 1, 2017, 12:00 PM"
但是...
我似乎无法让 fortnightly
或 quarterly
触发器正常运行。
// Every second Tuesday at 12pm
// ... There is no "date.fortnight", is this possible?
// The 1st of every quarter at 12pm
var quarterly = DateComponents()
quarterly.hour = 12
quarterly.day = 4
// Values: 1, 2, 3 or 4 all produce the same "nextTriggerDate" - why?
quarterly.quarter = 4
let quarterlyTrigger = UNCalendarNotificationTrigger(dateMatching: quarterly, repeats: true)
quarterlyTrigger.nextTriggerDate()
所以,明确地说,我的问题是:
- 是否有可能收到每两周重复一次的通知?
- 我们如何获得每季度一次的触发?
因为 DateComponents()
有一个 quarter
单位,我假设 quarterly
触发器是可能的。然而,对于每两周一次的提醒,我什至不确定这是否可能......
如有任何见解,我们将不胜感激!
最佳答案
我没有看到任何直接触发两周通知的选项。我这边的建议。
1) 是否有可能收到每两周重复一次的通知?
我提出两种选择:
我们可以使用
UNTimeIntervalNotificationTrigger
以两周的时间间隔重复通知吗?下面的例子let timeInterValFor2Weeks = 1190507.790425003 let intervalTrigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterValFor2Weeks, repeats: true)//"Jan 3, 2017, 5:24 PM" intervalTrigger.nextTriggerDate() //"Jan 17, 2017, 12:05 PM"
安排两个
UNCalendarNotificationTrigger
触发器,它们应该在一个月的第一天和第三天触发。例如,它应该在一个月的第一个星期日和第三个星期日触发通知。var fortnightPart1 = DateComponents() fortnightPart1.weekday = 1 //(Day..here Sunday) fortnightPart1.weekdayOrdinal = 2 //= n == (nth Day in the month...here 2nd Sunday in every month month) fortnightPart1.hour = 12 let fortnightTrigger = UNCalendarNotificationTrigger(dateMatching: fortnightPart1, repeats: true) fortnightPart1.nextTriggerDate()
2) 我们如何获得每季度一次的触发?
如果没有可用的直接选项,那么我建议采用与上述相同的解决方案。
关于iOS 通知触发器 : fortnightly and/or quarterly,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41441124/