AddTarget.swift

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var textField: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        textField.addTarget(self, action: "hoge:", forControlEvents: UIControlEvents.EditingChanged)
    }
    
    // !!! 処理が遠い＆ジャンプできない !!!
    func hoge(textField: UITextField) {
        print(textField.text)
    }

}