Date Format From Date Swift Vs
Swift version: 5.4
Paul Hudson@twostraws
If you want to get a string from a Date, Apple's DateFormatter class has everything you need: you can get short dates, long dates, dates with times, and can even go the opposite way to give you a Date from a string.
- Swift does the heavy work for us and decides the correct format based on the user's preferences. Now imagine that we need to send a String Date to our backend with a specific format?
- In the first six-digit subfield, indicate the value date of your instruction in the format year-month-day. In the second three-letter subfield, indicate the currency code of one of the currencies accepted for settlement in Euroclear Bank (please refer to the Quick cash card ).
Swift Date Time Formatting Overview Swift is a programming language for macOS, iOS, watchOS and tvOS. Chances are if you are developing a mobile app for iphones, ipads or iwatches, you'll need to learn swift. Date Time Formatting in Swift is based off of the DateFormatter class which can be used to manipulate dates.
There are four primary ways you're going to use it:
Date Format From Date Swift Online
- Converting a
Dateinstance to a string using one of the built-in date formats. - Converting a
Dateinstance to a string using one of the built-in time formats. - Converting a
Dateinstance to a string using a completely custom format. - Converting a string instance to a
Date.
Below are examples of each to get you started.
First, this converts a Date to a short date string using dateStyle:
That will print something like '12/31/2019' depending on the user's locale.
Second, this converts the same date to a medium time string using timeStyle:
That will print something like '20:27:32' or '8:27:32pm' depending on the user's locale.
Third, this converts the same date to a date and time string using a custom date format:
That will print something like '20:32 Wed, 30 Oct 2019'.
Finally, this attempts to convert a string to a date
Cocktail sle v4 9 4 intelserial download free. date(from:) returns an optional Date because it might be given a string containing an invalid value, so that code uses nil coalescing to make sure there's a default value printed.
Date Format From Date Swift Code
SPONSORED Join a FREE crash course for iOS devs who want to become complete senior developers — from October 18th to 24th. Learn how to apply iOS app architecture patterns through a series of lectures and practical coding sessions.
Available from iOS 2.0
Similar solutions…
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Working with dates is hard, there is no doubt about that. And formatting dates properly for every user of your app is no easier (if you want to do everything manually). Luckily, the system can help us.
For example, in the US one would write 'October 15' while in The Netherlands we write 15 oktober.
Note that the order of the date and the month is different, the spelling of the month is different and the capitalization is different too.
The DateFormatter in iOS will handle a lot of this for you. For example, if you'd use the following code on a device that uses nl as its locale you would see the output that I added to this snippet as a comment:
The output of this code is spot on. Exactly what we need and it matches the specified date format perfectly. If you'd run the same code on a device that uses en_us as its locale the output would be 15 October.
The date formatter got the spelling and capitalization right but the date and month are in the wrong order.
You can fix this by using setLocalizedDateFormatFromTemplate on your date formatter instead of assigning its dateFormat directly. Let's look at an example that runs on a device with nl as its locale again:
That still works, perfect. If you'd run this code on an en_us device the output would be October 15. Exactly what we need.
If you want to play around with setLocalizedDateFormatFromTemplate in a Playground you can give it a go with the following code that uses a date formatter in different locales:
If you have questions about this Quick Tip, or if you want to reach out to me for other reasons then don't hesitate to send me a message on Twitter.
It's a good thing that Swift and Foundation can handle these kinds of
Categories
Quick Tip