Get firstdate, lastdate of month?

Question

I want to get firstdate、lastdate of month，I try

NSDateComponents *components = [calendar components:units fromDate:[NSDate date]];
[components setDay:1];
self.c         


        

Answer 1

In Swift based in Nazir's answer

        func getFirstAndLastDateOfMonth(date: NSDate) -> (fistDateOfMonth: NSDate, lastDateOfMonth: NSDate) {

            let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
            let calendarUnits = NSCalendarUnit.CalendarUnitYear | NSCalendarUnit.CalendarUnitMonth
            let dateComponents = calendar?.components(calendarUnits, fromDate: date)

            let fistDateOfMonth = self.returnedDateForMonth(dateComponents!.month, year: dateComponents!.year, day: 1)
            let lastDateOfMonth = self.returnedDateForMonth(dateComponents!.month + 1, year: dateComponents!.year, day: 0)

            println("fistDateOfMonth \(fistDateOfMonth)")
            println("lastDateOfMonth \(lastDateOfMonth)")

            return (fistDateOfMonth!,lastDateOfMonth!)
        }

       func returnedDateForMonth(month: NSInteger, year: NSInteger, day: NSInteger) -> NSDate? {
            var components = NSDateComponents()
            components.day = day
            components.month = month
            components.year = year

            let gregorian = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)

            return gregorian!.dateFromComponents(components)
        }

Answer 2

Ok, since I'm rolling my own calendar control, I went ahead and created a NSCalendar category. Here's my lastOfMonth method:

- (NSDate *)lastOfMonth:(NSDate *)date
{
    NSDateComponents *dc = [self components:NSEraCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit fromDate:date];

    NSRange dim = [self rangeOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:date];
    dc.day = dim.length;

    return [self dateFromComponents:dc];
}