如何在NSDate中添加一些周？ [英] How to add a number of weeks to an NSDate?

问题描述

我过去使用以下函数在特定时间间隔内使用 NSDateComponents 添加到现有日期。

I have in the past used the below function to add on a specific time interval using NSDateComponents to an existing date.

(NSDate *)dateByAddingComponents:(NSDateComponents *)comps
                          toDate:(NSDate *)date
                         options:(NSCalendarOptions)opts

从iOS8开始， NSDateComponents不推荐使用周值，这意味着我无法实现我想做的事情：通过在给定的<$中添加一定的周数来生成新的 NSDate C $ C>的NSDate 。

From iOS8 the week value is deprecated for NSDateComponents, which means I can't achieve what I want to do: generate a new NSDate by adding a certain number of weeks to a given NSDate.

非常感谢任何帮助。

推荐答案

更新：正如Zaph在答案中所说，Apple实际上建议使用 weekOfYear 或 weekOfMonth 而不是我提供的答案。查看Zaph的答案了解详情。

Update: As Zaph said in his answer, Apple actually recommends using weekOfYear or weekOfMonth instead of the answer I provided. View Zaph's answer for details.

你可能会很快意识到你正在过度思考它，但是你可以这样做即使周价值已被弃用，也会在某个日期添加一定的周数，例如：

You'll probably quickly realize that you're overthinking it, but here's how you can add a certain number of weeks to a date even though the week value's been deprecated, ex:

NSDateComponents *comp = [NSDateComponents new];
int numberOfDaysInAWeek = 7;
int weeks = 3; // <-- this example adds 3 weeks
comp.day = weeks * numberOfDaysInAWeek;

NSDate *date = [[NSCalendar currentCalendar] dateByAddingComponents:comp toDate:date options:0];

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