Observing change in UIDatePicker

objective-c ios uidatepicker key-value-observing
Chris picture Chris · Aug 8, 2012 · Viewed 27.9k times · Source

I noticed that there is no delegate to observe changes in UIDatePicker. Is there a way to detect when a change is made in the picker without confirming anything, like the moment it spins and lands on a new number I want to be able to detect that. I thought about key value observing, but I don't think there's a property that changes on the spot

Answer

chroman picture chroman · Aug 8, 2012

You need to add to your UIDatePicker the UIControlEventValueChanged event to handle date changes:

[myDatePicker addTarget:self action:@selector(dateIsChanged:) forControlEvents:UIControlEventValueChanged];

Then the implementation:

- (void)dateIsChanged:(id)sender{
     NSLog(@"Date changed");
}

Related questions

UIDatePicker select Month and Year

I need a UIDatePicker for selecting Month and Year only. I checked the class reference documents. Looks like UIDatePicker is a UIView. I imagined UIPickerView may be a sub view and I can hide the component if I can grab …

Read More
Convert date in MM/dd/yyyy format in xcode?

I have a UIDatePicker and I m getting the selected date from it in yyyy-MM-dd format.Now I want to convert it to MM/dd/yyyy format ..How can i do it ? NSDateFormatter *df=[[[NSDateFormatter alloc]init] autorelease]; df.dateFormat = @"…

Read More
Change UIDatePicker font color?

All I want to do is change the font color of the UIDatePicker. I've researched other questions but they're all involving changing other properties and customizing the entire look. All I want to do is just change the font color …

Read More