Swift for NSDate date and other operations

nsdate Extension If only one of the methods is needed to extract the

Extension NSDate {

/**

Get how many days of this month

*/

Func getmonthhowmanyday ()->int {

We can generally understand that the "small unit" at a point in time, the number in the "Big unit"

Returnnscalendar.currentcalendar (). Rangeofunit (. Day, Inunit:. Month, fordate:self). length

}

Get date is day of the week

Func getdateweekday ()->int {

Let Datefmt =nsdateformatter ()

Datefmt.dateformat = "Yyyy-mm-dd HH:mm:ss"

Let interval =int (self.timeintervalsince1970)

Let-days =int (interval/86400)

Let weekday = ((days +4)%7+7)%7

Return weekday

}

/**

* Get the first day of the month is the week

*/

Func getmontfirstweekday ()->int {

1.Sun. 2.Mon. 3.Thes. 4.Wed. 5.Thur. 6.Fri. 7.Sat.

Let Calendar =nscalendar.currentcalendar ()

Notice here that Swift will write in [,] this way

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Set into the first day

Com.day =1

Let date = calendar.datefromcomponents (COM)

We can generally understand that the "small unit" at a point in time, the position in the "Big unit" Ordinalityofunit

Let Firstweekday = Calendar.ordinalityofunit (. Weekday, Inunit:. Weekofmonth, fordate:date!)

Return firstWeekDay-1

}

/**

* Get current day

*/

Func getday ()->int {

Let Calendar =nscalendar.currentcalendar ()

Notice here that Swift will write in [,] this way

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Return Com.day

}

/**

* Get Current month

*/

Func getmonth ()->int {

Let Calendar =nscalendar.currentcalendar ()

Notice here that Swift will write in [,] this way

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Return Com.month

}

/**

* Get Current year

*/

Func getyear ()->int {

Let Calendar =nscalendar.currentcalendar ()

Notice here that Swift will write in [,] this way

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Return com.year

}

/**

Get one months of time at a specified time

*/

Func getnextdate ()->nsdate {

Let Calendar =nscalendar.currentcalendar ()

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Com.month +=1

Com.day =1

If Com.month ==nsdate (). GetMonth () {

Com.day =nsdate (). Getday ()

}

return calendar.datefromcomponents (COM)!

}

/**

Get one months of time at a specified time

*/

Func getlastdate ()->nsdate {

Let Calendar =nscalendar.currentcalendar ()

Let com = calendar.components ([. Year,. Month,. Day], fromdate:self

Com.month-=1

Com.day =1

If Com.month ==nsdate (). GetMonth () {

Com.day =nsdate (). Getday ()

}

return calendar.datefromcomponents (COM)!

}

/**

Gets the length of one months at a specified time

*/

Func getnextdatelenght ()->int {

Let date =self.getnextdate ()

Return Date.getmonthhowmanyday ()

}

/**

Gets the length of one months at a specified time

*/

Func getlastdatelenght ()->int {

Let date =self.getlastdate ()

Return Date.getmonthhowmanyday ()

}

Current Time Label contents

Func gettimeyyyy_mm ()->string {

Let Day =getday ()

Let month =getmonth ()

Let year =getyear ()

Let DateString =string ("Year" (month) month (day))

Return datestring

}

/**

Whether it is today

*/

Func istoday ()->bool {

Let Calendar =nscalendar.currentcalendar ()

Time to get self

Let comself = calendar.components ([. Year,. Month,. Day], fromdate:self

Get the current time

Let Comnow = calendar.components ([. Year,. Month,. Day], Fromdate:nsdate ()

return comself.year==comnow.year && comself.month==comnow.month && comself.day==comnow.day

}

/**

Whether it is this month

*/

Func isequalmonth (date:nsdate)->bool {

Let Calendar =nscalendar.currentcalendar ()

Time to get self

Let comself = calendar.components ([. Year,. Month,. Day], fromdate:self

Get the current time

Let Comnow = calendar.components ([. Year,. Month,. Day], Fromdate:date

return comself.year==comnow.year && Comself.month==comnow.month

}

/**

Whether it is this month

*/

Func isthismonth ()->bool {

Let Calendar =nscalendar.currentcalendar ()

Time to get self

Let comself = calendar.components ([. Year,. Month,. Day], fromdate:self

Get the current time

Let Comnow = calendar.components ([. Year,. Month,. Day], Fromdate:nsdate ()

return comself.year==comnow.year && Comself.month==comnow.month

}

/**

To get the exact date of the month

*/

Func getdatey_m_d (Day:int)-> (year:int,month:int,day:int) {

Let Calendar =nscalendar.currentcalendar ()

Let comself = calendar.components ([. Year,. Month,. Day], fromdate:self

Comself.day = Day

Return (Comself.year,comself.month,comself.day)

}

/**

Gets the specified date

*/

Func getDate (day:int)-> NSDate {

Let Calendar =nscalendar.currentcalendar ()

Let comself = calendar.components ([. Year,. Month,. Day], fromdate:self

Comself.day = Day

Return calendar.datefromcomponents (comself)!

}

/**

Converts the current time to a string

*/

Func currentdateintostring ()->string {

Let Dateformatter =nsdateformatter ()

Dateformatter.dateformat = "Yyyy-mm-dd HH:mm:ss"

Let timestring = Dateformatter.stringfromdate (self)

Return timestring

}

}