gareth power gareth power - 1 year ago 131
Swift Question

How to 'addTarget' to UILabel in Swift

I am trying to add labels in Swift, which are added in a loop. I then want to add a 'TapGesture' event to each one as they are added. It works , but the problem is that the function called takes data from the label to use when it's clicked, but the label has been redefined by then and it takes data from the last one added, not the one that was clicked. How can I make each one unique?

self.label.attributedText = self.myMutableString
let tapGesture = UITapGestureRecognizer(target: self, action: handleTap(label))
self.label.font = UIFont.boldSystemFontOfSize(28)
self.label.sizeToFit() = CGPoint(x: screenWidth, y: top)
if(device=="iPhone"||device=="iPhone Simulator"){
top = top+80
top = top+140

The code below is the gesture recognizer that gets the label data and uses it:

func handleTap(sender:UILabel){
var a = self.label.text
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

let resultViewController = storyBoard.instantiateViewControllerWithIdentifier("displayer")

self.presentViewController(resultViewController, animated: true, completion: nil)

Answer Source

The handler function for a UITapGestureRecognizer is passed the UITapGestureRecognizer as the sender. You can access the view that it is attached to with the view property. I would suggest something like this:

func handleTap(sender: UITapGestureRecognizer) {
    guard let a = (sender.view as? UILabel)?.text else { return }


You will also need to change the signature of your selector:

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))

or for earlier versions of Swift:

let tapGesture = UITapGestureRecognizer(target: self, action: "handleTap:")
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