以天数，小时，分和秒显示差异，然后实时更新？ [英] display the difference in Days, Hours, Minutes and Seconds with it then updating in realtime?

问题描述

我是一个noob ...
我有

I am a noob... I have

QuitTime.text = quitDate;

过去是一个日期...
如何显示差异天数，小时，分和秒，然后实时更新？

Which is a date in the past... How can I display the difference in Days, Hours, Minutes and Seconds with it then updating in realtime?

推荐答案

可以使用 NSDateComponents

    NSDate *currentDate = [NSDate date];    

    NSCalendar *gregorian = [[[NSCalendar alloc]
                         initWithCalendarIdentifier:NSGregorianCalendar]autorelease];

     NSUInteger unitFlags = NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

     NSDateComponents *components = [gregorian components:unitFlags
                                            fromDate:quitDate
                                              toDate:currentDate options:0];
     NSLog(@"Component Month:%d",[component month]);
     NSLog(@"Component Day:%d",[component day]);
     NSLog(@"Component Hour:%d",[component hour]);
     NSLog(@"Component Mins:%d",[component minute]);

参考：两个NSDate对象之间的差异 - 结果也是NSDate

这篇关于以天数，小时，分和秒显示差异，然后实时更新？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！