Question

我如何获得这十年的第一年和去年？有人可以帮我这个吗？

我可以获得今年的第一个日期，但是这个十年呢？这是我的代码

[dateFormat setDateFormat:@"yyyy"];
        NSString *theDateFormatted = [dateFormat stringFromDate: Sdate];

        theDateFormatted = [NSString stringWithFormat:@"%@%@", theDateFormatted, @"-01-01 12:00:00 AM"];

        // set last of month
        NSString *theDateFormattedE = [dateFormat stringFromDate: Sdate];
        theDateFormattedE = [NSString stringWithFormat:@"%@%@", theDateFormattedE, @"-12-31 11:59:59 PM"];

        [dateFormat setDateFormat:@"yyyy-MM-dd hh:mm:ss a"];
        Edate = [dateFormat dateFromString:theDateFormattedE];
        Sdate = [dateFormat dateFromString:theDateFormatted];

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"DB Status" message: theDateFormattedE delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];

Answer 1

首先从日期开始获取当前年份，如下所示：

NSDate *currentDate = [NSDate date];
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar     components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:currentDate]; // Get necessary date components

NSInteger year = [components year];

然后，要获得十年的开始年份，

NSInteger firstYearOfTheDecade = year - (year % 10); //Add 1 to this if you want to start from x1

和去年

NSInteger lastYearOfTheDecade = firstYearOfTheDecade + 9;

如何在Objective-C中获得本十年的第一年和去年？

1 个答案: