使用Swift在UIActionsheet中添加datepicker

class KPDAtePickerViewController: UIViewController {
    var datePicker:UIDatePicker!
    @IBOutlet var dateTextField:UITextField!

    override func viewDidLoad() {
        var customView:UIView = UIView (frame: CGRectMake(0,100,320,160))
        customView.BACkgroundColor = UIColor.brownColor()
        datePicker = UIDatePicker(frame: CGRectMake(0,160))
        customView .addSubview(datePicker)
        dateTextField.inputView = customView
        var doneButton:UIButton = UIButton (frame: CGRectMake(100,44))
        doneButton.settitle("Done",forState: UIControlState.Normal)
        doneButton.addTarget(self,action: "datePickerSELEcted",forControlEvents: UIControlEvents.TouchUpInsidE)
        doneButton.BACkgroundColor = UIColor .blueColor()
        dateTextField.inputAccessoryView = doneButton
    }

    func datePickerSELEcted() {
        dateTextField.text =  datePicker.date.description
    }
}