NepaliDateFieldViewController
Hosts a single typed date entry field.
options.outlined picks NepaliDateTextField when true and the filled NepaliDateField when false. The controller owns the field contents, so Swift only observes them through onValueChange.
Parameters
date the field opens with, or null for empty.
language, date format and digit script the field renders with.
digit layout the user types into, for example YYYY_SLASH_MM_SLASH_DD.
first Bikram Sambat year accepted.
last Bikram Sambat year accepted.
policy deciding which dates are valid, or null to accept every date.
appearance and behaviour knobs, or null for the library defaults.
receives the content height in points, so the caller can size its frame.
invoked whenever the field parses to a new value, or to null while the entry is incomplete.