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I try to compare two days ignoring time. So I use
calendar.compare(date1, to: date2, toGranularity: .day)
BUT when transfering the string date to Date type, it is transformed to UTC. So it will be "moved" from 1.1.2016 0:05 to 31.12.2015 11:05 pm. When comparing daywise, this includes only the remaining hour. Before conversion it was 24 hours. Any idea to handle this issue without much effort?
Additionally: The code:
var dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy hh:mm"
var date1 : Date = dateFormatter.date(from: "01-01-2016 00:05")!
var date2 = dateFormatter.date(from: "01-01-2016 03:30")
if let dateFromString = dateFormatter.date(from: "01-01-2016 00:05") {
print(dateFromString)
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
let stringFromDate = dateFormatter.string(from: dateFromString)
}
Calendar.current.compare(date1, to: date2!, toGranularity: .day) == .orderedSame
468
Getting number of days between two dates //MARK:- daysBetween func daysBetween(start: Date, end: Date) -> Int { return Calendar. current. dateComponents([. day], from: start, to: end).
For comparing the two dates, we have used the compareTo() method. If both dates are equal it prints Both dates are equal. If date1 is greater than date2, it prints Date 1 comes after Date 2. If date1 is smaller than date2, it prints Date 1 comes after Date 2.
Swift's Date struct conforms to both Equatable and Comparable , which means you check two dates for equality and compare them to see which is earlier.
Swift – Get Current Date Only To get only current date, containing day, month and year, use Date and DateFormatter . Date returns current point in time, while DateFormatter with specified dateFormat formats this Date value to required format, like in this case returning only date (day, month and year).
base on usage dateComponents(_:from:to:) function
import Foundation
extension Date {
func fullDistance(from date: Date, resultIn component: Calendar.Component, calendar: Calendar = .current) -> Int? {
calendar.dateComponents([component], from: self, to: date).value(for: component)
}
func distance(from date: Date, only component: Calendar.Component, calendar: Calendar = .current) -> Int {
let days1 = calendar.component(component, from: self)
let days2 = calendar.component(component, from: date)
return days1 - days2
}
func hasSame(_ component: Calendar.Component, as date: Date) -> Bool {
distance(from: date, only: component) == 0
}
}
Do not forget to put here the Solution code (look above)
var dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd-MM-yyyy hh:mm:ss"
//dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
let smallerDate = dateFormatter.date(from: "01-01-2012 00:05:01")!
let biggerDate = dateFormatter.date(from: "03-12-2019 09:30:01")!
print(smallerDate.fullDistance(from: biggerDate, resultIn: .day)) // Optional(2893)
print(biggerDate.fullDistance(from: smallerDate, resultIn: .day)) // Optional(-2893)
print(smallerDate.fullDistance(from: biggerDate, resultIn: .year)) // Optional(7)
print(biggerDate.fullDistance(from: smallerDate, resultIn: .year)) // Optional(7)
print(smallerDate.fullDistance(from: biggerDate, resultIn: .hour)) // Optional(69441)
print(biggerDate.fullDistance(from: smallerDate, resultIn: .hour)) // Optional(-69441)
print(smallerDate.distance(from: biggerDate, only: .day)) // -2
print(biggerDate.distance(from: smallerDate, only: .day)) // 2
print(smallerDate.distance(from: biggerDate, only: .year)) // -7
print(biggerDate.distance(from: smallerDate, only: .year)) // 7
print(smallerDate.distance(from: biggerDate, only: .hour)) // -9
print(biggerDate.distance(from: smallerDate, only: .hour)) // 9
print(smallerDate.hasSame(.day, as: biggerDate)) // false
print(biggerDate.hasSame(.second, as: smallerDate)) // true
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