如何获得给定年份的周数 [英] How to get the number of weeks from given year

问题描述

我已成功从某个日期检索了一个星期编号，但现在我想了解某个特定年份的星期。

I have successfully retrieved a week number from a date, but now I want to get how many weeks are in a given year.

我如何做？

推荐答案

使用 NSCalendar 和 NSDateComponents

- (NSInteger) getNumberOfWeeks : (NSDate *) fromDate {
    NSCalendar *cal = [NSCalendar currentCalendar];
    NSDateComponents *components = [cal components:NSCalendarUnitWeekOfYear fromDate:fromDate];
    return [components weekOfYear];
}

此方法将返回12月31日到您通过的日期在此功能中。

This method will return number of week from December 31 to the date which you pass in this function.

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