相对日期格式，过去日期的输出？

编程入门行业动态更新时间:2024-10-25 01:24:46

本文介绍了相对日期格式，过去日期的输出？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我正在使用 - [NSDateFormatter setDoesRelativeDateFormatting：] 将日期显示为今天或昨天。我只是查看过去的日期，但很好奇我会为英国本地化的选项。

只是

今天
昨天

前一天

解决方案

b $ b

是否可能的输出列在任何地方，所以我可以了解正确显示它们所需的屏幕空间？

是的。当您运行以下程序时，它们会列在控制台窗口中：

#import< Foundation / Foundation.h> int main（int argc，const char * argv []） { @autoreleasepool { NSDateFormatter * formatter = [NSDateFormatter alloc] init]; [formatter setDateStyle：NSDateFormatterFullStyle]; [formatter setDoesRelativeDateFormatting：YES]; NSCalendar * cal = [[NSLocale currentLocale] objectForKey：NSLocaleCalendar]; NSDateComponents * minusOneDay = [[NSDateComponents alloc] init]; [minusOneDay setDay：-1]; NSDate * today = [NSDate date]; NSDate * date = [NSDate date]; while（1> [[cal components：NSYearCalendarUnit fromDate：date toDate：today options：0] year]）{ NSLog（@％@ formatter stringFromDate：date]）; date = [cal dateByAddingComponents：minusOneDay toDate：date options：0]; } } return 0; }

在我的语言环境中，列表似乎只是Tomorrow 和昨天。

I am looking at using -[NSDateFormatter setDoesRelativeDateFormatting:] to present dates as "Today" or "Yesterday". I am only looking at dates in the past but am curious what options I would see localised for the UK.

Just

"Today"
"Yesterday"

or anything more convoluted like

"The day before yesterday"

Are the possible outputs listed anywhere so I can get an idea of the screen space needed to correctly display them?

解决方案

Yes. They are listed in your console window when you run the following program:

#import <Foundation/Foundation.h> int main(int argc, const char * argv[]) { @autoreleasepool { NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterFullStyle]; [formatter setDoesRelativeDateFormatting:YES]; NSCalendar * cal = [[NSLocale currentLocale] objectForKey:NSLocaleCalendar]; NSDateComponents * minusOneDay = [[NSDateComponents alloc] init]; [minusOneDay setDay:-1]; NSDate * today = [NSDate date]; NSDate * date = [NSDate date]; while( 1 > [[cal components:NSYearCalendarUnit fromDate:date toDate:today options:0] year] ){ NSLog(@"%@", [formatter stringFromDate:date]); date = [cal dateByAddingComponents:minusOneDay toDate:date options:0]; } } return 0; }