iOS 通知触发器:每两周和/或每季度 [英] iOS Notification Trigger: fortnightly and/or quarterly

问题描述

我似乎找不到任何适用于这种确切情况的 Apple 文档，并且我尝试了各种方法来做到这一点，但我一直空无一物.

I can't seem to find any Apple Documentation for this exact scenario, and I've tried various ways to do this and I keep coming up empty.

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.

I would like to schedule a repeating notification (iOS 10+ so UNCalendarNotificationTrigger or equivalent).
These are Local Notifications not Push Notifications.

安排重复的通知:

• 每两周一次(例如，每秒星期二)
• 每季度一次(例如，每 3 个月一次)

• once a fortnight (e.g., every second Tuesday)
• once a quarter (e.g., 1st of every 3 months)

这些触发器运行良好，并且易于实现(在 Swift Playground 中运行代码).

These triggers work well, and are simple to implement (Running the code in a Swift Playground).

// 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 触发器正常工作.

But...

I can't seem to get a fortnightly or quarterly trigger to function correctly.

// 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:

So, to be clear, my questions are:

1. 是否可以获得每两周重复一次的通知?
2. 我们如何获得每季度一次的触发器?

由于 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......

Since DateComponents() has a quarter unit, I assume that a quarterly trigger is possible. For the fortnightly reminder however, I'm not even sure if this is possible...

任何见解将不胜感激！

推荐答案

我没有看到任何触发两周通知的直接选项.来自我的建议.

I didn't see any direct option to trigger fortnight notification.Suggestion from my end.

1) 是否可以获得每两周重复一次的通知?

我提出了两个选择:

1. 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

1. Can we use UNTimeIntervalNotificationTrigger to repeat the notification with a time interval of two weeks time? Example below

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，应该在一个月的第一天和第三天触发.例如，它应该在每月的第一个星期日和第三个星期日发出通知.

Schedule two UNCalendarNotificationTrigger trigger, which should trigger first and third day of a month. For example it should fire notification in first Sunday and third Sunday of a month.

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器?

如果没有可用的直接选项，那么我建议与上述相同的解决方案.

If there is no direct option available, then I suggest the same solution as above.

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