I want to create a range of Date objects using Swift 3 and was wondering if there is an API somewhere that simplifies what I want to do, for example:
One of the things I want to do is produce a range of Dates for the period of 1 year (January through December), each Date representing the 1st of every month.
I know I can do all this within a loop like so...
func monthsInYear() {
var calendar = Calendar.current
let date = Date()
let monthsOfYearRange = calendar.range(of: .month, in: .year, for: date)
print(monthsOfYearRange as Any)
if let monthsOfYearRange = monthsOfYearRange {
let year = calendar.component(.year, from: date)
for monthOfYear in (monthsOfYearRange.lowerBound..<monthsOfYearRange.upperBound) {
let components = DateComponents(year: year, month: monthOfYear)
guard let date = Calendar.current.date(from: components) else { continue }
print(date.description(with: Locale.current))
}
}
}
Which produces the following output...
Sunday, January 1, 2017 at 12:00:00 AM Eastern Standard Time
Wednesday, February 1, 2017 at 12:00:00 AM Eastern Standard Time
Wednesday, March 1, 2017 at 12:00:00 AM Eastern Standard Time
Saturday, April 1, 2017 at 12:00:00 AM Eastern Daylight Time
Monday, May 1, 2017 at 12:00:00 AM Eastern Daylight Time
Thursday, June 1, 2017 at 12:00:00 AM Eastern Daylight Time
Saturday, July 1, 2017 at 12:00:00 AM Eastern Daylight Time
Tuesday, August 1, 2017 at 12:00:00 AM Eastern Daylight Time
Friday, September 1, 2017 at 12:00:00 AM Eastern Daylight Time
Sunday, October 1, 2017 at 12:00:00 AM Eastern Daylight Time
Wednesday, November 1, 2017 at 12:00:00 AM Eastern Daylight Time
Friday, December 1, 2017 at 12:00:00 AM Eastern Standard Time
However, what I'm looking for is an easier more concise way to do this. I want to do the same for weeks in a given month, days within a given week, hours within a given day which I am able to do, but it uses the same loop.
This is what I went with - stuck with "the loop" :S
func monthsInYear() {
print()
print("monthsInYear")
var calendar = Calendar.current
let date = Date()
let monthsOfYearRange = calendar.range(of: .month, in: .year, for: date)
//print(monthsOfYearRange as Any)
if let monthsOfYearRange = monthsOfYearRange {
let year = calendar.component(.year, from: date)
for monthOfYear in (monthsOfYearRange.lowerBound..<monthsOfYearRange.upperBound) {
let components = DateComponents(year: year, month: monthOfYear)
guard let date = Calendar.current.date(from: components) else { continue }
print(date.description(with: Locale.current))
}
}
}
func weeksInMonths() {
print()
print("weeksInMonths")
var calendar = Calendar.current
let date = Date()
let weekOfYearRange = calendar.range(of: .weekOfYear, in: .month, for: date)
//print(weekOfYearRange as Any)
if let weekOfYearRange = weekOfYearRange {
let year = calendar.component(.year, from: date)
for weekOfYear in (weekOfYearRange.lowerBound..<weekOfYearRange.upperBound) {
let components = DateComponents(weekOfYear: weekOfYear, yearForWeekOfYear: year)
guard let date = Calendar.current.date(from: components) else { continue }
print(date.description(with: Locale.current))
}
}
}
func daysInWeek() {
print()
print("daysInWeek")
var calendar = Calendar.current
let date = Date()
let daysInWeekRange = calendar.range(of: .day, in: .weekOfMonth, for: date)
//print(daysInWeekRange as Any)
if let daysInWeekRange = daysInWeekRange {
let year = calendar.component(.year, from: date)
let month = calendar.component(.month, from: date)
let weekOfMonth = calendar.component(.weekOfMonth, from: date)
for dayOfWeek in (daysInWeekRange.lowerBound..<daysInWeekRange.upperBound) {
let components = DateComponents(month: month, day: dayOfWeek, weekOfMonth: weekOfMonth)
guard let date = Calendar.current.date(from: components) else { continue }
print(date.description(with: Locale.current))
}
}
}
func hoursInDay() {
print()
print("hoursInDay")
var calendar = Calendar.current
let date = Date()
let hoursInDayRange = calendar.range(of: .hour, in: .day, for: date)
//print(hoursInDayRange as Any)
if let hoursInDayRange = hoursInDayRange {
let year = calendar.component(.year, from: date)
let month = calendar.component(.month, from: date)
let weekOfMonth = calendar.component(.weekOfMonth, from: date)
let day = calendar.component(.day, from: date)
for hourOfDay in (hoursInDayRange.lowerBound..<hoursInDayRange.upperBound) {
let components = DateComponents(year: year, month: month, day: day, hour: hourOfDay, weekOfMonth: weekOfMonth)
guard let date = Calendar.current.date(from: components) else { continue }
print(date.description(with: Locale.current))
}
}
}
Which produces the following output when run:
monthsInYear
Sunday, January 1, 2017 at 12:00:00 AM Eastern Standard Time
Wednesday, February 1, 2017 at 12:00:00 AM Eastern Standard Time
Wednesday, March 1, 2017 at 12:00:00 AM Eastern Standard Time
Saturday, April 1, 2017 at 12:00:00 AM Eastern Daylight Time
Monday, May 1, 2017 at 12:00:00 AM Eastern Daylight Time
Thursday, June 1, 2017 at 12:00:00 AM Eastern Daylight Time
Saturday, July 1, 2017 at 12:00:00 AM Eastern Daylight Time
Tuesday, August 1, 2017 at 12:00:00 AM Eastern Daylight Time
Friday, September 1, 2017 at 12:00:00 AM Eastern Daylight Time
Sunday, October 1, 2017 at 12:00:00 AM Eastern Daylight Time
Wednesday, November 1, 2017 at 12:00:00 AM Eastern Daylight Time
Friday, December 1, 2017 at 12:00:00 AM Eastern Standard Time
weeksInMonths
Sunday, November 26, 2017 at 12:00:00 AM Eastern Standard Time
Sunday, December 3, 2017 at 12:00:00 AM Eastern Standard Time
Sunday, December 10, 2017 at 12:00:00 AM Eastern Standard Time
Sunday, December 17, 2017 at 12:00:00 AM Eastern Standard Time
Sunday, December 24, 2017 at 12:00:00 AM Eastern Standard Time
Sunday, December 31, 2017 at 12:00:00 AM Eastern Standard Time
daysInWeek
Monday, December 10, 1 at 12:00:00 AM GMT-04:56:02
Tuesday, December 11, 1 at 12:00:00 AM GMT-04:56:02
Wednesday, December 12, 1 at 12:00:00 AM GMT-04:56:02
Thursday, December 13, 1 at 12:00:00 AM GMT-04:56:02
Friday, December 14, 1 at 12:00:00 AM GMT-04:56:02
Saturday, December 15, 1 at 12:00:00 AM GMT-04:56:02
Sunday, December 16, 1 at 12:00:00 AM GMT-04:56:02
hoursInDay
Tuesday, December 12, 2017 at 12:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 1:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 2:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 3:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 4:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 5:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 6:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 7:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 8:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 9:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 10:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 11:00:00 AM Eastern Standard Time
Tuesday, December 12, 2017 at 12:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 1:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 2:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 3:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 4:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 5:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 6:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 7:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 8:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 9:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 10:00:00 PM Eastern Standard Time
Tuesday, December 12, 2017 at 11:00:00 PM Eastern Standard Time