UITextField Swift中的ios – resignFirstResponder

import UIKit

class ViewController: UIViewController,UIPickerViewDatasource,UIPickerViewDelegate {
    // Do any additional setup after loading the view,typically from a nib.

    //initialization constants
    let pickerView = UIPickerView()
    let textField = UITextField()
    let pickerData = ["1","2","three"]


    override func viewDidLoad() {
        //pickerview tool bar
        let toolbar = UIToolbar(frame: CGRectMake(0,320,44))
        var items = [AnyObject]()
        //making done button
        let doneButton = UIBarButtonItem(title: "Done",style: .Plain,target: self,action: SELEctor(donePressed()))
        items.append(doneButton)
        toolbar.barStyle = UIBarStyle.black
        toolbar.setItems(items,animated: truE)


        //creaTing textfields with a pickerview
        pickerView.delegate = self
        pickerView.datasource = self
        pickerView.frame = CGRectMake(0,500,300)
        textField.inputAccessoryView = toolbar
        textField.inputView = pickerView
        textField.frame = CGRectMake(200,55,100,35)
    textField.BACkgroundColor = UIColor.blueColor()

    //adding objs to viewController
    self.view.addSubview(textField)
}

func donePressed() {
    resignFirstResponder()
}





override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}



}

//MARK: Data sources UIPickerView
extension ViewController: UIPickerViewDatasource {
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 1
    }
    func pickerView(pickerView: UIPickerView!,numberOfRowsInComponent component: int) -> Int {
        return pickerData.count
    }
}

//MARK: Delegates UIPickerView
extension ViewController: UIPickerViewDelegate {
    // several optional methods:




func pickerView(pickerView: UIPickerView,titleForRow row: Int,forComponent component: int) -> String! {
    return pickerData[row]
}

func pickerView(pickerView: UIPickerView!,didSELEctRow row: Int,inComponent component: int) {
    textField.text = pickerData[row]
}
}