iphone - 检查NSDate是在本周还是下周

Question

有没有办法检查 NSDate 是本周还是下周？

我知道今天是:

[NSDate date]

然后我该怎么办？

Answer 1

使用 NSDateComponents，像这样:

NSCalendar *gregorian = [[NSCalendar alloc]
    initWithCalendarIdentifier:NSGregorianCalendar];
    NSDate *today = [NSDate date];

    NSDateComponents *todaysComponents =
        [gregorian components:NSWeekCalendarUnit fromDate:date];

    NSUInteger todaysWeek = [todaysComponents week];


    NSDate *anotherDate = [NSDate date];

    NSDateComponents *otherComponents =
        [gregorian components:NSWeekCalendarUnit fromDate:anotherDate];

    NSUInteger anotherWeek = [otherComponents week];

    if(todaysWeek==anotherWeek){
         NSLog(@"another date is this week");
    }else if(todaysWeek+1==anotherWeek){
         NSLog(@"another date is next week")
    }

您还可以使用其他组件(例如月份或年份)来完全确定。

注意:不要使用 timeIntervals。通过使用 NSDateComponents，您可以忽略小时、分钟和秒。我想你想要那个。