iPhone NSDate例如。下周五 [英] iPhone NSDate eg. next Friday

问题描述

我想创建一个导致下周五日期的功能，但我没有计划如何去做。有没有人给我一个好的暗示？

I want to create a function which results the date of next Friday but I have no plan how to do it. Has anyone a good hint to me ?

推荐答案

这是我在格里高利历中接下来的5个星期日的工作解决方案：

Here is my working solution for getting the next 5 Sundays in Gregorian calendar:

self.nextBeginDates = [NSMutableArray array];

NSDateComponents *weekdayComponents = [[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:[NSDate date]];
int currentWeekday = [weekdayComponents weekday]; //[1;7] ... 1 is sunday, 7 is saturday in gregorian calendar

NSDateComponents *comp = [[NSDateComponents alloc] init];
[comp setDay:8 - currentWeekday];   // add some days so it will become sunday

// build weeks array
int weeksCount = 5;
for (int i = 0; i < weeksCount; i++) {
    [comp setWeek:i];   // add weeks

    [nextBeginDates addObject:[[NSCalendar currentCalendar] dateByAddingComponents:comp toDate:[NSDate date] options:0]];
}
[comp release];

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