title: UIDatePicker doesn't print out a date
body: <p>I implemented a UIDatePicker into my app. If I change the default date after the date picker was popping up, the date picker gives a valid date back. But if I'd like to choose the current date (I don't have to change the date picker) the date picker doesn't give a date back. Does someone knows a solution for this in Swift?</p>
  
  <pre><code>    //Date Picker config.
  
  func datePickerChanged(datePicker:UIDatePicker) {
  
      var dateFormatter = NSDateFormatter()
  
      dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle
  
      var strDate = dateFormatter.stringFromDate(datePicker.date)
      dateLabel.text = strDate
  }
  </code></pre>