NSDate的NSDateComponents [英] NSDateComponents of an NSDate

问题描述

如何获取单个NSDate的NSDateComponents？我不想要两个日期之间的差异，只是NSDate的秒，分，小时，日，月和年的差异？

How do I get the NSDateComponents of a single NSDate? I don't want the components of the difference between 2 dates, just the seconds, minutes, hours, day, month and year of a NSDate?

推荐答案

Apple docs ，清单3：获取日期组件：

There's an example in the Apple docs, Listing 3: Getting a date’s components:

NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc]
                         initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *weekdayComponents =
                    [gregorian components:(NSDayCalendarUnit | 
                                           NSWeekdayCalendarUnit) fromDate:today];
NSInteger day = [weekdayComponents day];
NSInteger weekday = [weekdayComponents weekday];

请注意，您必须将日历单位 组件方法。

Note that you have to 'or' together the calendar units you want in the call of the components method.

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