In iOS 3.2 and higher, you can use gesture recognizers. For example, this is how you would handle a tap event:

//The setup code (in viewDidLoad in your view controller)UITapGestureRecognizer *singleFingerTap =   [[UITapGestureRecognizer alloc] initWithTarget:self                                           action:@selector(handleSingleTap:)];[self.view addGestureRecognizer:singleFingerTap];//The event handling method- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer{  CGPoint location = [recognizer locationInView:[recognizer.view superview]];  //Do stuff here...}

There are a bunch of built in gestures as well. Check out the docs for iOS event handling and UIGestureRecognizer. I also have a bunch of sample code up on github that might help.

Gesture Recognizers

There are a number of commonly used touch events (or gestures) that you can be notified of when you add a Gesture Recognizer to your view. They following gesture types are supported by default:

• UITapGestureRecognizer Tap (touching the screen briefly one or more times)
• UILongPressGestureRecognizer Long touch (touching the screen for a long time)
• UIPanGestureRecognizer Pan (moving your finger across the screen)
• UISwipeGestureRecognizer Swipe (moving finger quickly)
• UIPinchGestureRecognizer Pinch (moving two fingers together or apart - usually to zoom)
• UIRotationGestureRecognizer Rotate (moving two fingers in a circular direction)

In addition to these, you can also make your own custom gesture recognizer.

Adding a Gesture in the Interface Builder

Drag a gesture recognizer from the object library onto your view.

Control drag from the gesture in the Document Outline to your View Controller code in order to make an Outlet and an Action.

This should be set by default, but also make sure that User Action Enabled is set to true for your view.

Adding a Gesture Programmatically

To add a gesture programmatically, you (1) create a gesture recognizer, (2) add it to a view, and (3) make a method that is called when the gesture is recognized.

import UIKitclass ViewController: UIViewController {    @IBOutlet weak var myView: UIView!        override func viewDidLoad() {        super.viewDidLoad()                // 1. create a gesture recognizer (tap gesture)        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(sender:)))                // 2. add the gesture recognizer to a view        myView.addGestureRecognizer(tapGesture)    }        // 3. this method is called when a tap is recognized    @objc func handleTap(sender: UITapGestureRecognizer) {        print("tap")    }}

Notes

• The sender parameter is optional. If you don't need a reference to the gesture then you can leave it out. If you do so, though, remove the (sender:) after the action method name.
• The naming of the handleTap method was arbitrary. Name it whatever you want using action: #selector(someMethodName(sender:)).

More Examples

You can study the gesture recognizers that I added to these views to see how they work.

Here is the code for that project:

import UIKitclass ViewController: UIViewController {        @IBOutlet weak var tapView: UIView!    @IBOutlet weak var doubleTapView: UIView!    @IBOutlet weak var longPressView: UIView!    @IBOutlet weak var panView: UIView!    @IBOutlet weak var swipeView: UIView!    @IBOutlet weak var pinchView: UIView!    @IBOutlet weak var rotateView: UIView!    @IBOutlet weak var label: UILabel!        override func viewDidLoad() {        super.viewDidLoad()                // Tap        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))        tapView.addGestureRecognizer(tapGesture)                // Double Tap        let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap))        doubleTapGesture.numberOfTapsRequired = 2        doubleTapView.addGestureRecognizer(doubleTapGesture)                // Long Press        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(gesture:)))        longPressView.addGestureRecognizer(longPressGesture)                // Pan        let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan(gesture:)))        panView.addGestureRecognizer(panGesture)                // Swipe (right and left)        let swipeRightGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(gesture:)))        let swipeLeftGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(gesture:)))        swipeRightGesture.direction = UISwipeGestureRecognizerDirection.right        swipeLeftGesture.direction = UISwipeGestureRecognizerDirection.left        swipeView.addGestureRecognizer(swipeRightGesture)        swipeView.addGestureRecognizer(swipeLeftGesture)                // Pinch        let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(handlePinch(gesture:)))        pinchView.addGestureRecognizer(pinchGesture)                // Rotate        let rotateGesture = UIRotationGestureRecognizer(target: self, action: #selector(handleRotate(gesture:)))        rotateView.addGestureRecognizer(rotateGesture)            }        // Tap action    @objc func handleTap() {        label.text = "Tap recognized"                // example task: change background color        if tapView.backgroundColor == UIColor.blue {            tapView.backgroundColor = UIColor.red        } else {            tapView.backgroundColor = UIColor.blue        }            }        // Double tap action    @objc func handleDoubleTap() {        label.text = "Double tap recognized"                // example task: change background color        if doubleTapView.backgroundColor == UIColor.yellow {            doubleTapView.backgroundColor = UIColor.green        } else {            doubleTapView.backgroundColor = UIColor.yellow        }    }        // Long press action    @objc func handleLongPress(gesture: UILongPressGestureRecognizer) {        label.text = "Long press recognized"                // example task: show an alert        if gesture.state == UIGestureRecognizerState.began {            let alert = UIAlertController(title: "Long Press", message: "Can I help you?", preferredStyle: UIAlertControllerStyle.alert)            alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))            self.present(alert, animated: true, completion: nil)        }    }        // Pan action    @objc func handlePan(gesture: UIPanGestureRecognizer) {        label.text = "Pan recognized"                // example task: drag view        let location = gesture.location(in: view) // root view        panView.center = location    }        // Swipe action    @objc func handleSwipe(gesture: UISwipeGestureRecognizer) {        label.text = "Swipe recognized"                // example task: animate view off screen        let originalLocation = swipeView.center        if gesture.direction == UISwipeGestureRecognizerDirection.right {            UIView.animate(withDuration: 0.5, animations: {                self.swipeView.center.x += self.view.bounds.width            }, completion: { (value: Bool) in                self.swipeView.center = originalLocation            })        } else if gesture.direction == UISwipeGestureRecognizerDirection.left {            UIView.animate(withDuration: 0.5, animations: {                self.swipeView.center.x -= self.view.bounds.width            }, completion: { (value: Bool) in                self.swipeView.center = originalLocation            })        }    }        // Pinch action    @objc func handlePinch(gesture: UIPinchGestureRecognizer) {        label.text = "Pinch recognized"                if gesture.state == UIGestureRecognizerState.changed {            let transform = CGAffineTransform(scaleX: gesture.scale, y: gesture.scale)            pinchView.transform = transform        }    }        // Rotate action    @objc func handleRotate(gesture: UIRotationGestureRecognizer) {        label.text = "Rotate recognized"                if gesture.state == UIGestureRecognizerState.changed {            let transform = CGAffineTransform(rotationAngle: gesture.rotation)            rotateView.transform = transform        }    }}

Notes

• You can add multiple gesture recognizers to a single view. For the sake of simplicity, though, I didn't do that (except for the swipe gesture). If you need to for your project, you should read the gesture recognizer documentation. It is fairly understandable and helpful.
• Known issues with my examples above: (1) Pan view resets its frame on next gesture event. (2) Swipe view comes from the wrong direction on the first swipe. (These bugs in my examples should not affect your understanding of how Gestures Recognizers work, though.)

I think you can simply use

UIControl *headerView = ...[headerView addTarget:self action:@selector(myEvent:) forControlEvents:UIControlEventTouchDown];

i mean headerView extends from UIControl.