Subtract date and time calculator4/7/2024 □️ Add date formatters to the playground by adding the following code: // Date formatters let iso8601DateFormatter = ISO8601DateFormatter ( ) var dateFormatter = DateFormatter ( )įinally, you’ll need some Date objects, which we’ll use to perform date calculations. A DateFormatter, which you’ll use to convert Date objects into “friendly” strings that display the date, time, or both.An ISO8601DateFormatter, which you’ll use to convert date strings in the ISO 8601 format into Date objects.You’ll also make use of a couple of date formatters: Setting userLocale to this value means that userLocale always contains the current locale settings. autoupdatingCurrent is a property that always contains the user’s current locale settings, even when they change. Var gregorianCalendar = Calendar (identifier. □️ Open Xcode, start a new blank iOS playground, and add the following code to it: // Locale and calendar var userLocale = Locale. ![]() ![]() Swift supports several calendar systems, but we’ll stick to the Gregorian calendar, the generally accepted standard worldwide. A Calendar object, which provides a user-friendly context for Date objects, which treat time as a number of seconds before or after January 1, 2001, 00:00:00 UTC.For example, if the locale for the user’s device is set to en_US, dates and times will be displayed in American English, with times shown using the 12-hour clock and “AM” and “PM”, and dates shown in month-day-year format. This defines the language and format of information presented to the user. To work with dates and times in Swift effectively, it’s helpful to set up a playground with some companion objects. Look for the □ emoji if you’d like to skim through the content while focusing on the build and execution steps. This tutorial is an interactive exercise you’ll perform in a Swift playground. I covered these topics in an earlier tutorial with two parts, Introduction to Date and Time Programming in Swift, Part 1 and Introduction to Date and Time Programming in Swift, Part 2. DateFormatter and ISO8601DateFormatter, which converts Dates into formatted strings, and formatted strings into Dates.Calendar, which provides a context for Dates and allows us to convert between Dates and DateComponents. ![]()
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