Instance Method
range(of:in:for:)
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
Returns the range of absolute time values that a smaller calendar component (such as a day) can take on in a larger calendar component (such as a month) that includes a specified absolute time.
func range(of smaller: Calendar.Component, in larger: Calendar.Component, for date: Date) -> Range<Int>?Parameters
smallerThe smaller calendar component.
largerThe larger calendar component.
dateThe absolute time for which the calculation is performed.
Return Value
The range of absolute time values smaller can take on in larger at the time specified by date. Returns nil if larger is not logically bigger than smaller in the calendar, or the given combination of components does not make sense (or is a computation which is undefined).
Discussion
You can use this method to calculate, for example, the range the day component can take on in the month in which date lies.