The template for formatting one date and time value.
UIKit for Mac 13.0+Beta
Use this string to specify a custom fixed format for each of the date and time values. The string you specify is based on the Unicode Technical Standard #35, which uses characters to represent the day, time, year, hour, minute, and other pieces of date or time information.
If you do not assign a value to this string, the formatter object automatically updates the string based on the values in the dateStyle and timeStyle properties.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.