Setting up NSDatePicker delegate

Question

I have a NSDatePicker (NSDatePicker* datePicker), and set its delegate as the main application (self). I programmed as follows.

1. Make self datePicker delegate

   [[datePicker cell] setDelegate:self];

2. Set datePickerAction: to be called when control is clicked.

   [datePicker setAction:@selector(datePickerAction:)];

This is the method.

- (IBAction)datePickerAction:(id)sender
{

    if( [[[NSApplication sharedApplication] currentEvent] modifierFlags] & 
       NSShiftKeyMask )
        NSLog(@"shift pressed %@", [datePicker dateValue]);

    else
        NSLog(@"hello %@", [datePicker dateValue]);

}

The problem is that delegation doesn't seem to work when I click the date in the NSDatePicker calendar.

• Q : What's wrong with this delegation? The target/action method works fine.
• Q : What document can I use for what delegation method is supported for NSDatePicker?

Answer 1

You have to add this method to your code :

- (void)datePickerCell:(NSDatePickerCell *)aDatePickerCell validateProposedDateValue:(NSDate **)proposedDateValue timeInterval:(NSTimeInterval *)proposedTimeInterval
{
   NSString *aDate = [myDateFormat stringFromDate:*proposedDateValue];
}

From IB, select the DatePickerCell, right click, drag the delegate entry to the File's Owner box.