NSCalendar 日期周数

Question

我正在尝试从日期中获取周数。谁能告诉我为什么不管我输入什么日期都只返回 0:

let currentWeekNumber = NSCalendar.currentCalendar().components(NSCalendarUnit.CalendarUnitWeekOfYear, fromDate: myDate).weekOfYear

myDate 的格式是这样的 2015-01-23 11:52:35 +0000

Swift 中的解决方案会很好 :)

Answer 1

看来你贴出的行没有错误。只需检查以下解决方案以确认结果是否相同。

注意： 只是试图消除任何与日期无关的问题的可能性。对于 Swift 你可以使用。

let calender = NSCalendar.currentCalendar()
let dateComponent = calender.components(NSCalendarUnit.WeekOfYearCalendarUnit  | NSCalendarUnit.DayCalendarUnit  | NSCalendarUnit.MonthCalendarUnit  | NSCalendarUnit.YearCalendarUnit, fromDate:NSDate())

println ("Week: = \(dateComponent.weekOfYear)")

因此响应应该如下所示：

Week: = 4

Answer 2

使用此代码

    NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitWeekOfMonth fromDate:[NSDate date]];
    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSInteger month = [components month];
    NSInteger year = [components year];
    NSInteger day = [components day];
    NSLog(@"%ld",(long)[components weekOfMonth]);

Answer 3

试试这个：

NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitWeekOfMonth fromDate:[NSDate date]];
NSInteger curr_month = [components month];
NSInteger curr_year = [components year];
NSInteger curr_date = [components day];
NSLog(@"%d %d %d, \n Week no: %ld",curr_date, curr_month,curr_year, (long)[components weekOfMonth]);

输出为：2015-01-22 18:19:40.209 样本[38734:3031191] 22 1 2015,

第 4 周

NSCalendar 日期周数

NSCalendar week number of date

nscalendar

ios

swift