CODEWITHSUNDEEP
swiftuiimageviewtags
Nathanael Tse
Nathanael Tse

Reputation: 363

Error in Swift when using UIImageView with selector @objc C function when reading sender.tag

An image sends an action to an @objc C function when pressed:

 let imageView = UIImageView()
 imageView.tag = 3
 imageView.isUserInteractionEnabled = true
 imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(ItemAction)))
 imageView.image = UIImage(named: (itemDictionary[character.Equipment[imageView.tag]]!.image))
 overlayView.addSubview(imageView)

this is the function that should be called:

@objc func ItemAction(sender: UIImageView!) {

    print(sender.tag)
    print("Item pressed from sender ")

}

the function runs, but when it comes to printing the sender tag I get an error message and the program quits:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITapGestureRecognizer tag]: unrecognized selector sent to instance 0x600002b42a00'

The whole setup with a UIButton works. How can I read the tag of an UIImageView in an external function?

Upvotes: 0

Views: 133

Answers (1)

Sahil Manchanda
Sahil Manchanda

Reputation: 10012

here you go

  @objc func itemAction(_ sender: UITapGestureRecognizer){
        if let tag = sender.view?.tag{
            print("ImageView tag \(tag)")
        }
    }

in your function change your method signature to

@objc func ItemAction(_ sender: UITapGestureRecognizer)

Upvotes: 2

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