one tap gesture on multiple UIImageView

Question

I have 2 UIImageView and a single tapGestureRecognizer.

 override func viewDidLoad() {
        // Do any additional setup after loading the view.

        super.viewDidLoad()

        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(cameraTapped(tapGestureRecognizer:)))

        cameraUIImageView.isUserInteractionEnabled = true
        cameraUIImageView.addGestureRecognizer(tapGestureRecognizer)

        plus1UIImageView.isUserInteractionEnabled = true
        plus1UIImageView.addGestureRecognizer(tapGestureRecognizer)
//        


    }

I can only tap on the second UIImageView, which is plus1UIImageView.

Why?

Hi @john I have ans your previous question do have a look and let me know if you have any queries. — luckyShubhra, Aug 16 '17 at 03:40

score 5 · Accepted Answer · answered Aug 16 '17 at 03:10

A UIGestureRecognizer must be used with a single view only. You are using same object for both views. Try this.

override func viewDidLoad() {
    // Do any additional setup after loading the view.

    super.viewDidLoad()

    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(cameraTapped(tapGestureRecognizer:)))

    cameraUIImageView.isUserInteractionEnabled = true
    cameraUIImageView.addGestureRecognizer(tapGestureRecognizer)


    let tapGestureRecognizer2 = UITapGestureRecognizer(target: self, action: #selector(cameraTapped(tapGestureRecognizer:)))

    plus1UIImageView.isUserInteractionEnabled = true
    plus1UIImageView.addGestureRecognizer(tapGestureRecognizer2)        
}

score 1 · Answer 2 · answered Aug 16 '17 at 03:09

1

You can only add a gesture recognizer to one view, so when you add it to the second it's getting removed from the first. More in depth answer here:

Can you attach a UIGestureRecognizer to multiple views?

answered Aug 16 '17 at 03:09

Kyle Somers

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score 0 · Answer 3 · answered Aug 16 '17 at 03:44

As all ans stated you can only add a gesture recognizer to one view. Although if both of your imageviews in same super view you can add tap gesture to their superview and access its subviews. You can check for tapped subview and take reference of tapped imageview using hitTest: method. Check my previous ans here. Do let me know if you have any queries in comment.

one tap gesture on multiple UIImageView

3 Answers3