Instance Method

datePickerCell:validateProposedDateValue:timeInterval:

The delegate receives this message each time the user attempts to change the receiver‘s value, allowing the delegate the opportunity to override the change.

Declaration

- (void)datePickerCell:(NSDatePickerCell *)datePickerCell validateProposedDateValue:(NSDate * _Nonnull *)proposedDateValue timeInterval:(NSTimeInterval *)proposedTimeInterval;

Parameters

aDatePickerCell

The cell that sent the message.

proposedDateValue

On input, contains the proposed new date. The delegate may change this value before returning.

proposedTimeInterval

On input, contains the proposed new time interval. The delegate may change this value before returning.

Discussion

When returning a new proposedDateValue, the NSDate instance should be autoreleased, and the proposedDateValue should not be released by the delegate.

The proposedDateValue and proposedTimeInterval are guaranteed to lie between the dates returned by minDate and maxDate. If you modify these values, you should ensure that the new values are within the appropriate range.