AddGesture different in Swift 3? - swift

Question

I have no idea why my code isn't working :
let profileImageView: UIImageView = {
let image = UIImageView()
image.image = UIImage(named: "gameofthrones_splash")
image.translatesAutoresizingMaskIntoConstraints = false
image.contentMode = .scaleAspectFill
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView))
image.addGestureRecognizer(tapGesture)
image.isUserInteractionEnabled = true
return image
}()
This imageView is loaded in the ViewDidLoad (I can see it)
func handleSelectProfileImageView() {
print("123")
}
But nothing get returned in the console when I'm tapping on it ! WTF?

Answer 1

It's in the target. This works when place in the viewDidLoad():
profileImageView.frame = CGRect(x: 60, y: 60, width: 70, height: 70)
view.addSubview(profileImageView)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView))
profileImageView.addGestureRecognizer(tapGesture)
The target is "self", which is the UIViewController (not the UIImageView). In most cases (I'm sure there are outliers) you want to record a gesture in a view, but work with the gesture in a view controller.

Answer 2

Okay the solution was quite simple actually. You have to make it a lazy var instead of a let.
lazy var profileImageView: UIImageView = {
let image = UIImageView()
image.image = UIImage(named: "gameofthrones_splash")
image.translatesAutoresizingMaskIntoConstraints = false
image.contentMode = .scaleAspectFill
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView))
image.addGestureRecognizer(tapGesture)
image.isUserInteractionEnabled = true
return image
}()

Answer 3

Swift 3.0:
There was some error I removed it -
Put this code in viewdidLoad
override func viewDidLoad() {
super.viewDidLoad()
var profileImageView:UIImageView {
var image = UIImageView()
image.backgroundColor = UIColor.red;
image.frame = CGRect(x: 0, y: 0, width: 44, height: 44)
image.translatesAutoresizingMaskIntoConstraints = false
image.contentMode = .scaleAspectFill
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView))
image.addGestureRecognizer(tapGesture)
image.isUserInteractionEnabled = true
return image
}
view.addSubview(profileImageView);
// Do any additional setup after loading the view.
}
func handleSelectProfileImageView() {
print("123")
}
Just to test I removed the image, you can add it. But it's working fine.

Answer 4

I fixed this issue using an UIButton ->
let profileImageView: UIButton = {
let iv = UIButton()
let image = UIImage(named: "r2d2")
iv.setImage(image, for: .normal)
iv.translatesAutoresizingMaskIntoConstraints = false
iv.addTarget(self, action: #selector(selectProfileImage), for: .touchUpInside)
iv.isUserInteractionEnabled = true
return iv
}()
#objc func selectProfileImage(){
print("Hello")
}