比较两个日期 - Swift

Question

How can I convert string like ( 2019-11-02 ) without time to date format and get current Date device without time then compare with together?

Answer 1

As well as the above using string representations of date, you can actually work with just the dates themselves. Just converting a the string will give you a "start of day" date. The Calendar has a method which will do the same with a date, allowing you to compare the converted string to 'today'

func isDateToday(dateString: String) -> Bool {
  let df = DateFormatter()
  df.dateFormat = "yyyy-MM-dd"
  let date = df.date(from: dateString)
  let today = Calendar.current.startOfDay(for: Date())
  return date == today
}

Answer 2

You can convert the string to date using a dateFormatter then compare with the current date using an if statement

import Foundation

//convert string to date

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
let myDate = dateFormatter.date(from: "2019-11-02")


//convert today's date in the same formate

let currentFormatter = DateFormatter()
currentFormatter.dateStyle = .short
currentFormatter.dateFormat = "yyyy-MM-dd"
let today = currentFormatter.string(from: Date())
let todayDate = dateFormatter.date(from: today)

//Compare the two date's

if myDate == todayDate {
    print("ok")
}