Unrecognized selector sent to instance Swift 3

Question

I want to implement TapGestureRecognizer with the selector, below is the code where I added tapGestureRecognizer to my imageView

Answer 1

The problem is with your method declaration and with assigning tag to the object of UIGestureRecognizer. Change your method declaration like this.

func assignImage(_ sender: UITapGestureRecognizer)

Or

func assignImage(_ sender: UIGestureRecognizer)

Edit: To access imageView object with UITapGestureRecognizer.

func assignImage(_ sender: UITapGestureRecognizer) {
    if let imageView = sender.view as? UIImageView {

    }
}

Note: You need to set tag with you imageView not with you UITapGestureRecognizer