Question

我使用此代码获取当周的天数：

static func currentDayOfWeek() -> Int {
    let comp = NSCalendar.current.dateComponents([.weekday], from: Date())
    if comp.weekday == 1 {
        return 7
    }

    return comp.weekday! - 1
}

Monday =  1
Tuesday = 2
...........
Sunday =  7

我无法弄清楚如何获得当月的当月数字。

例如，今天当天的当月数字应为3，而今年的数字应为277。

有什么建议吗？

Answer 1

let dayYear = Calendar.current.ordinality(of: .day, in: .year, for: Date())

let dayMonth = Calendar.current.ordinality(of: .day, in: .month, for: Date())

Answer 2

func currentDayOfMonth()->Int {
    return NSCalendar.currentCalendar().ordinalityOfUnit(NSCalendarUnit.Day, inUnit: NSCalendarUnit.Month, forDate: NSDate())
}

func currentDayOfYear()->Int {
    return NSCalendar.currentCalendar().ordinalityOfUnit(NSCalendarUnit.Day, inUnit: NSCalendarUnit.Year, forDate: NSDate())
}

Answer 3

原始答案来自this帖子。

这将返回＆＃34;星期一＆＃34;或者星期几：

func getDayOfWeek(_ today:String) -> String? {

    let weekdays = [1:"Sunday", 2:"Monday", 3:"Tuesday", 4:"Wednesday", 5:"Thursday", 6:"Friday", 7:"Saturday"]

    let formatter  = DateFormatter()
    formatter.dateFormat = "MM-dd-yyyy"
    if let todayDate = formatter.date(from: today) {
        let myCalendar = Calendar(identifier: .gregorian)
        let weekDay = myCalendar.component(.weekday, from: todayDate)
        let day = weekdays[weekDay]

        return day
    } else {
        return nil
    }
}

getDayOfWeek("10-03-2016")

这将返回＆＃34; 1＆＃34;或者一周中的一天的数字：

func getDayOfWeek(_ today:String) -> Int? {

    let formatter  = DateFormatter()
    formatter.dateFormat = "MM-dd-yyyy"
    if let todayDate = formatter.date(from: today) {
        let myCalendar = Calendar(identifier: .gregorian)
        let weekDay = myCalendar.component(.weekday, from: todayDate)

        return weekDay
    } else {
        return nil
    }
}

getDayOfWeek("10-03-2016")

如何获取当前月份和当前的当日数字

3 个答案: