UIImageView UITapGestureRecognizer not working - ios

Question

Tap gesture event not gettint called. I may be doing something wrong, but please have a look (I tried adding recognizer to self.view but still no luck) :
LoginViewController
class LoginViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let container = UIView()
container.heightAnchor.constraintEqualToConstant(50).active = true
let myVC1 = MyViewController()
let myVC2 = MyViewController()
let myVC3 = MyViewController()
let myVC4 = MyViewController()
let myStackView = UIStackView(arrangedSubviews: [myVC1.view, myVC2.view, myVC3.view, myVC4.view])
myStackView.spacing = 10
myStackView.alignment = .Fill
myStackView.distribution = .EqualSpacing
container.addSubview(myStackView)
view.addSubview(container)
}
}
MyViewController
class MyViewController: UIViewController, UIGestureRecognizerDelegate {
let ImageView = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
ImageView.backgroundColor = UIColor.blueColor()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(pressedSocialMediaItem(_:)))
tapGestureRecognizer.delegate = self
tapGestureRecognizer.numberOfTapsRequired = 1
ImageView.userInteractionEnabled = true
ImageView.addGestureRecognizer(tapGestureRecognizer)
view.addSubview(ImageView)
}
func pressedSocialMediaItem(sender : UITapGestureRecognizer) {
print("PRESSED ! ")
}
}

Answer 1

I suggest using MyViewController.pressedSocialMediaItem, so your code should work like this.
class MyViewController: UIViewController, UIGestureRecognizerDelegate {
let ImageView = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
ImageView.backgroundColor = UIColor.blueColor()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(MyViewController.pressedSocialMediaItem(_:)))
tapGestureRecognizer.delegate = self
tapGestureRecognizer.numberOfTapsRequired = 1
ImageView.userInteractionEnabled = true
ImageView.addGestureRecognizer(tapGestureRecognizer)
view.addSubview(ImageView)
}
func pressedSocialMediaItem(sender : UITapGestureRecognizer) {
print("PRESSED ! ")
}
}
I have tested the following on my machine and it works:
import UIKit
class ViewController: UIViewController, UIGestureRecognizerDelegate {
#IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageView.backgroundColor = UIColor.blueColor()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.pressedSocialMediaItem(_:)))
tapGestureRecognizer.delegate = self
tapGestureRecognizer.numberOfTapsRequired = 1
imageView.userInteractionEnabled = true
imageView.addGestureRecognizer(tapGestureRecognizer)
view.addSubview(imageView)
}
func pressedSocialMediaItem(sender : UITapGestureRecognizer) {
print("PRESSED ! ")
}
}

Answer 2

Okey, so I got it working somehow. All I need to do was to add view controllers inside my LoginViewController like so:
self.addChildViewController(myVC1)
Instead of using view.addSubview(container)
Notice: I'm not sure it is the correct way of doing this, and please comment if it's not. Meanwhile it solves my problem.