如何比较时间 [英] How to compare time

问题描述

如何比较目标C的时间？

How to compare time in Objective C?

if (nowTime > 9:00 PM) && (nowTime < 7:00 AM) 
{
  doSomething;
}

推荐答案

当前小时并将其与某些时间进行比较，您将必须使用 NSDate ， NSDateComponents 和 NSCalendar 。

If you want to get the current hour and compare it to some times, you're going to have to use NSDate, NSDateComponents, and NSCalendar.

NSDateComponents *components = [[NSCalendar currentCalendar] components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:[NSDate date]];
NSInteger currentHour = [components hour];
NSInteger currentMinute = [components minute];
NSInteger currentSecond = [components second];

if (currentHour < 7 || (currentHour > 21 || currentHour == 21 && (currentMinute > 0 || currentSecond > 0))) {
    // Do Something
}

这将检查时间是否在9:00 PM和7:00 AM。当然，如果你想要不同的时间，你将不得不改变代码一点。

That will check if the time is between 9:00 PM and 7:00 AM. Of course, if you're going to want different times you'll have to change the code a little.

阅读关于 NSDate ， NSDateComponents 和 NSCalendar 了解详情。

Read about NSDate, NSDateComponents, and NSCalendar to learn more.

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