如何获取当前小时使用Cocoa？ [英] How do I get the current hour using Cocoa?

问题描述

如何使用Objective-C获取Cocoa的当前时间？

How do I get the current hour in Cocoa using Objective-C?

推荐答案

a href =http://developer.apple.com/documentation/Cocoa/Conceptual/DatesAndTimes/DatesAndTimes.html#//apple_ref/doc/uid/10000039 =nofollow noreferrer>可可的日期和时间编程主题。这将让您很好地了解使用Cocoa中提供的各种日期/时间/日历对象进行日期的高级转换。

To start off, you should read Dates and Times Programming Topics for Cocoa. That will give you a good understanding of using the various date/time/calendar objects that are provided in Cocoa for high-level conversions of dates.

但是，此代码snip ，将回答您的具体问题：

This code snip, however, will answer your specific problem:

- (NSInteger)currentHour
{
    // In practice, these calls can be combined
    NSDate *now = [NSDate date];
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [calendar components:NSHourCalendarUnit fromDate:now];

    return [components hour];
}

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