查找下周一的NSDate [英] Find the NSDate for next Monday

问题描述

我想获取当前日期之后的下一个星期一的日期。

I want to get the date of the next Monday after the current date.

因此，如果今天的日期是2013-08-09（星期五），那么我想得到日期2013-08-12。

So if today's date is 2013-08-09 (Friday) then I want to get the date 2013-08-12.

我该怎么办？

推荐答案

这段代码应该可以得到您想要的。

This piece of code should get what you want. It simply calculates how many days are from monday and append it from current's date.

NSDate *now = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSWeekCalendarUnit | NSWeekdayCalendarUnit fromDate:now];

NSUInteger weekdayToday = [components weekday];  
NSInteger daysToMonday = (9 - weekdayToday) % 7;

NSDate *nextMonday = [now dateByAddingTimeInterval:60*60*24*daysToMonday];

未经测试，但应该可以使用，无担心更改

Untested, but should work, and without worrying about changing first dates of calendar.

，甚至可以轻松地将其添加到一周的隔日，只需更改 9 内（9-周日今日）％7； 乘 7 + weekDayYouWant ，记住星期日= 1，星期一= 2 ...

And it can even be easily addapted to every another day of the week, just change the 9inside (9 - weekdayToday) % 7; by 7 + weekDayYouWant, remembering that sunday = 1, monday = 2...

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