如何确定 NSDate 是否是今天? [英] How to determine if an NSDate is today?

问题描述

如何检查一个NSDate是否属于今天?

How to check if an NSDate belongs to today?

我曾经使用 [aDate description] 中的前 10 个字符来检查它.[[aDate description] substringToIndex:10] 返回类似 "YYYY-MM-DD" 的字符串，所以我将字符串与 [[[NSDate] 返回的字符串进行了比较date] description] substringToIndex:10].

I used to check it using first 10 characters from [aDate description]. [[aDate description] substringToIndex:10] returns string like "YYYY-MM-DD" so I compared the string with the string returned by [[[NSDate date] description] substringToIndex:10].

是否有更快速和/或更简洁的检查方法?

Is there more fast and/or neat way to check?

谢谢.

推荐答案

在 macOS 10.9+ &iOS 8+，NSCalendar/Calendar 上有一个方法可以做到这一点！

In macOS 10.9+ & iOS 8+, there's a method on NSCalendar/Calendar that does exactly this!

- (BOOL)isDateInToday:(NSDate *)date 

所以你只需要做

目标 C:

BOOL today = [[NSCalendar currentCalendar] isDateInToday:date];

Swift 3:

let today = Calendar.current.isDateInToday(date)

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