How can I use the selected data from a UIDatePicker in another view in IOS8?

Question

I'm very new to IOS 8 and programming in general. I would like to populate a UIButton's label text with the value from a UIDatePicker. When the user presses the button, a popover appears with a date picker. I have created a new view controller imbedded in a navigation controller for my date picker. They are connected using a popover segue. My question is once the user selects a date, how can I transmit this information back to the original view controller to show the value on the button label. Any help would be greatly appreciated.

Answer 1

To pass a value between 2 viewcontrollers using segues is easies done like this:

class VC1:UIViewController {
    @IBAction func next() {
        let valueToPass = NSDate() // Could be anything that conforms to AnyObject
        self.performSegueWithIdentifier("segueID", sender: valueToPass) // Use this method unless you're connecting a button to a viewcontroller in storyboard
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        let vc2 = segue.destinationViewController as VC2 // The viewcontroller you're going to
        vc2.date = sender as NSDate // If you connected button to vc in storyboard sender will be nil, so in that case just set the vc2.date directly here
    }
}


class VC2:UIViewController {
    var date:NSDate! // Property you want to pass to
}