Swift中格式化日期 Swift中格式化日期

【Swift中格式化日期】Swift语言中格式化日期跟其它编程语言很相似：

var dformatter = NSDateFormatter()dformatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"var datestr = dformatter.stringFromDate(date)

用Calendar操作日期

let gregorian = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)let now = NSDate()var dateformatter = NSDateFormatter() dateformatter.dateFormat = "yyyy-MM-dd" let birthday = dateformatter.dateFromString("1986-11-10")let components = gregorian?.components(NSCalendarUnit.CalendarUnitYear, fromDate: birthday!, toDate: now, options: NSCalendarOptions(0))components?.year