NSDate从现在倒数到NSDate [英] NSDate countdown from NOW to NSDate

问题描述

如何显示HH：mm：ss格式的倒计时，从现在到将来会发生的所需NSDate？

How can I show a countdown in HH:mm:ss format from NOW to a desired NSDate that will happen in the future?

推荐答案

您必须使用计时器来打勾日期。

You have to use a timer for ticking the date.

存储将来的日期，并继续减去将来的日期-[今天的日期] ...

Store a future date, and keep on substracting future date - [nsdate today]...

以秒为单位计算时间，并将其计算为小时，分钟，秒...

Calculate the time in seconds and calculate it into Hours, minutes, seconds...

//属性 NSDate * nowDate，* futureDate

futureDate=...;

nowDate=[NSDate date];

long elapsedSeconds=[nowDate timeIntervalSinceDate:futureDate];
NSLog(@"Elaped seconds:%ld seconds",elapsedSeconds);

NSInteger seconds = elapsedSeconds % 60;
NSInteger minutes = (elapsedSeconds / 60) % 60;
NSInteger hours = elapsedSeconds / (60 * 60);
NSString *result= [NSString stringWithFormat:@"%02ld:%02ld:%02ld", hours, minutes, seconds];

这对您来说很方便... 请仔细检查项目 ...

This will come handy for you...kindly check the project...

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