如何使用NSDate从今天开始查找工作日? [英] How to find weekday from today's date using NSDate?

问题描述

我知道我可以通过[NSDate date];来确定今天的日期，但是我将如何找出星期几，如星期六，星期五等.

I know that I can figure out today's date by [NSDate date]; but how would I find out today day of the week, like Saturday, Friday etc.

我知道%w可以在NSDateFormatter中使用，但是我不知道要使用它.

I know that %w can be used in NSDateFormatter, but I don't know to use it.

推荐答案

NSCalendar* cal = [NSCalendar currentCalendar];
NSDateComponents* comp = [cal components:NSCalendarUnitWeekday fromDate:[NSDate date]];
return [comp weekday]; // 1 = Sunday, 2 = Monday, etc.

如果您只需要平日而不需要其他组件，请参见 @HuguesBR 的答案(需要iOS 8+ ).

See @HuguesBR's answer if you just need the weekday without other components (requires iOS 8+).

NSInteger weekday = [[NSCalendar currentCalendar] component:NSCalendarUnitWeekday 
                                                   fromDate:[NSDate date]];

(如果您没有得到正确的答案，请检查您是否将NSCalendarUnitWeekday的键入错误与其他与星期相关的组件，例如NSCalendarUnitWeekdayOrdinal等)

(If you don't get a correct answer, check if you have mistyped NSCalendarUnitWeekday with other week-related components like NSCalendarUnitWeekdayOrdinal, etc.)

迅速3:

let weekday = Calendar.current.component(.weekday, from: Date())
// 1 = Sunday, 2 = Monday, etc.

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