How to Get the Today's and Tomorrow's Date in Swift 4

How to get the today's and tomorrow's date in swift 4

I would do this with components.

Assuming you need time in seconds as defined by time(2). If you need in milliseconds as defined by time(3), then you can multiply it out by 1000.

// Get right now as it's `DateComponents`.
let now = Calendar.current.dateComponents(in: .current, from: Date())

// Create the start of the day in `DateComponents` by leaving off the time.
let today = DateComponents(year: now.year, month: now.month, day: now.day)
let dateToday = Calendar.current.date(from: today)!
print(dateToday.timeIntervalSince1970)

// Add 1 to the day to get tomorrow.
// Don't worry about month and year wraps, the API handles that.
let tomorrow = DateComponents(year: now.year, month: now.month, day: now.day! + 1)
let dateTomorrow = Calendar.current.date(from: tomorrow)!
print(dateTomorrow.timeIntervalSince1970)

You can get yesterday by subtracting 1.

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If you need this in the universal time (UTC, GMT, Z… whatever name you give universal time), then use the following.

let utc = TimeZone(abbreviation: "UTC")!
let now = Calendar.current.dateComponents(in: utc, from: Date())

swift 3 how to get date for tomorrow and yesterday ( take care special case ) new month or new year

You should use Calendar method date(byAdding component:) to do your calendrical calculations using noon time. Doing so you don't need to worry about those special cases:

Swift 3 or Later

extension Date {
    static var yesterday: Date { return Date().dayBefore }
    static var tomorrow:  Date { return Date().dayAfter }
    var dayBefore: Date {
        return Calendar.current.date(byAdding: .day, value: -1, to: noon)!
    }
    var dayAfter: Date {
        return Calendar.current.date(byAdding: .day, value: 1, to: noon)!
    }
    var noon: Date {
        return Calendar.current.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }
    var month: Int {
        return Calendar.current.component(.month,  from: self)
    }
    var isLastDayOfMonth: Bool {
        return dayAfter.month != month
    }
}

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Date.yesterday    // "Oct 28, 2018 at 12:00 PM"
Date()            // "Oct 29, 2018 at 11:01 AM"
Date.tomorrow     // "Oct 30, 2018 at 12:00 PM"

Date.tomorrow.month   // 10
Date().isLastDayOfMonth  // false

Date format in Swift TODAY TOMORROW YESTERDAY

The DateFormatter doesn't behave well when setting doesRelativeDateFormatting = true and trying to apply a custom format at the same time. So the easiest solution is to use the format given by a Style and a Locale

let relativeDateFormatter = DateFormatter()
relativeDateFormatter.timeStyle = .none
relativeDateFormatter.dateStyle = .medium
relativeDateFormatter.locale = Locale(identifier: "en_GB")
relativeDateFormatter.doesRelativeDateFormatting = true

Example

let inputFormatter = DateFormatter()
inputFormatter.dateFormat = "yyyy-MM-dd"

let dates = ["2020-09-01", "2020-09-15", "2020-09-16", "2020-09-30"].compactMap { inputFormatter.date(from: $0)}

for date in dates {
    print(relativeDateFormatter.string(from: date))
}

1 Sep 2020

Yesterday

Today

30 Sep 2020

Now if you want to apply a custom format I have not found a solution for this when using the same DateFormatter instance so we need to create a new one for the custom format and use it together with a check so we apply the custom format only when it is not Today etc

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE, MMM dd"

for date in dates {
    let string = relativeDateFormatter.string(from: date)
    if let _ = string.rangeOfCharacter(from: .decimalDigits) {
         print(dateFormatter.string(from: date))
    } else {
        print(string)
    }
}

Tuesday, Sep 01

Yesterday

Today

Wednesday, Sep 30

Set Tomorrow Date from custom date swift

import Foundation

extension Date {

    var tomorrow: Date? {
        return Calendar.current.date(byAdding: .day, value: 1, to: self)
    }
}

let today = Date()

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy, HH:mm b"

if let tomorrow = today.tomorrow {
    let tomorrowString = dateFormatter.string(from: tomorrow)
    print("\(tomorrowString)" // "Mar 23, 2017, 00:14 AM\n"
}

How to get the current time as datetime

Update for Swift 3:

let date = Date()
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)

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I do this:

let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute, fromDate: date)
let hour = components.hour
let minutes = components.minute

See the same question in objective-c How do I get hour and minutes from NSDate?

Compared to Nate’s answer, you’ll get numbers with this one, not strings… pick your choice!

How to display Yesterday, Today, and Tomorrow with DateFormatter

You need doesRelativeDateFormatting (and don't forget to add styles), for eg:

var dateFormatter: DateFormatter {
    let df = DateFormatter()
    df.dateFormat = "MMM d, h:mm a"

    df.dateStyle = .medium
    df.timeStyle = .short
    df.doesRelativeDateFormatting = true

    return df
}

swift check date is today or tomorrow

You can use Calendar.current.ordinality to compare the day of the year for the various dates. Here's an example that generates dates from today and tomorrow and then filters them back into separate arrays:

let today = Date()
let todayInts = Array(0..<10).map { today.timeIntervalSince1970 + TimeInterval($0) }
print("Today:", todayInts,"\n")

let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: today)!
let tomorrowInts = Array(0..<10).map { tomorrow.timeIntervalSince1970 + TimeInterval($0) }
print("Tomorrow:", tomorrowInts,"\n")

let allInts = todayInts + tomorrowInts

let todayDayOfYear = Calendar.current.ordinality(of: .day, in: .year, for: today)!

let filteredTodayInts = allInts.filter { Calendar.current.ordinality(of: .day, in: .year, for: Date(timeIntervalSince1970: $0)) == todayDayOfYear }
print("Filtered today:", filteredTodayInts,"\n")

let tomorrowDayOfYear = todayDayOfYear + 1

let filteredTomorrowInts = allInts.filter { Calendar.current.ordinality(of: .day, in: .year, for: Date(timeIntervalSince1970: $0)) == tomorrowDayOfYear }
print("Filtered tomorrow:", filteredTomorrowInts,"\n")

Swift - Get next date

Here is the code snippet that may help you.

//Call method like this

convertNextDate(dateString: "31 12 2016")

// Method is here

func convertNextDate(dateString : String){    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "dd MM yyyy"
    let myDate = dateFormatter.date(from: dateString)!
    let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: myDate)
    let somedateString = dateFormatter.string(from: tomorrow!)
    print("your next Date is \(somedateString)")
}

Another way is to create extension and here it is.

extension String {
    func convertToNextDate(dateFormat: String) -> String {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = dateFormat
        let myDate = dateFormatter.date(from: self)!
        let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: myDate)
        return dateFormatter.string(from: tomorrow!)
    }
}

Usage

print("31 12 2016".convertToNextDate(dateFormat: "dd MM yyyy"))

Note: You can use use your desired date-format just make sure it is appropriate.

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