UILocalNotification中的非固定repeatInterval [英] non-fixed repeatInterval in UILocalNotification

问题描述

我已经在这头上挣扎了好几个星期了.

I've been cracking my head on this one for weeks now.

如果将UILocalNotification的repeatInterval属性设置为非固定间隔会发生什么? (不固定，我指的是诸如NSWeekdayCalendarUnit和NSWeekdayOrdinalCalendarUnit的单位).

What happens if I set the repeatInterval property of a UILocalNotification to be a non-fixed interval? (by non-fixed I mean units such as NSWeekdayCalendarUnit and NSWeekdayOrdinalCalendarUnit).

假设我将UILocalNotification的fireDate设置为当前周的星期三，并将repeatInterval设置为NSWeekdayCalendarUnit.它会在每个星期三重复吗?

So say I have UILocalNotification with its fireDate set to the Wednesday in the current week, and I set the repeatInterval to be NSWeekdayCalendarUnit. Will it repeat every Wednesday?

NSWeekdayOrdinalCalendarUnit是否相同?因此，如果我将fireDate设置为每月第4个星期三，并且将repeatInterval设置为NSWeekdayOrdinalCalendarUnit，则是否每个月的第4个星期三重复一次?

Is the same true for NSWeekdayOrdinalCalendarUnit? So if I have a notification with the fireDate set to be the 4th Wednesday of the month, and I set the repeatInterval to be NSWeekdayOrdinalCalendarUnit, will it repeat every 4th Wednesday of every month?

谢谢.

推荐答案

好的，为了所有人的利益，这就是我发现的东西:

OK, for the benefit of everyone, here's what I found:

• 将重复间隔设置为NSWeekdayCalendarUnit并没有达到我的预期效果，相反，我想它会查找一周内该工作日的每一次发生，并且由于只有一次，因此它安排了通知时间该周结束时(默认为星期六)

• Setting the repeat interval to NSWeekdayCalendarUnit doesn't work how I expected, instead, I suppose it looks for every occurrence of that weekday inside a week, and because there is only one, it then schedules the notification for the end of that week (the default is Saturday)

以类似的方式，将其设置为NSWeekdayOrdinalCalendarUnit会创建类似的行为，因为看到X日的X序号不再出现，因此诉诸于该工作日的las序号一个月之内.

In a similar way, setting it to NSWeekdayOrdinalCalendarUnit creates a similar behavior, in that, seeing that there is no more occurrences of X ordinal of X day, it resorts to scheduling to the las ordinal for that weekday in a month.

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