how to use addTarget with labels, imageview or uiview?

Question

While using table cells, we implement buttons and associate actions using "addTarget" with the button just like below

cell.button1.addTarget(self, action: #selector(actionforbutton(_:)), for: .touchUpInside)

how we can associate other properties like labels, UIImageView or UIView of the table cell in a similar fashion to perform certain actions, as I couldn't find " addTarget " while using the labels, UIImageView or UIView

You can use [`UITapGestureRecognizer`](https://developer.apple.com/documentation/uikit/uitapgesturerecognizer) — iOSDev, Feb 21 '20 at 06:28
@KishanBhatiya can please provide me with some code example for this as I am new to the swift coding — , Feb 21 '20 at 06:29
@rishi Check this [link](https://iosdevcenters.blogspot.com/2017/05/uitapgesturerecognizer-tutorial-in.html) — iOSDev, Feb 21 '20 at 06:29
@iOSDev the link you shared is for objective c, i am working with swift — , Feb 21 '20 at 06:33
@rishi check: https://medium.com/app-makers/how-to-add-a-tap-gesture-to-uilabel-in-xcode-swift-7ada58f1664 — Kishan Bhatiya, Feb 21 '20 at 06:33
@rishi https://stackoverflow.com/questions/28675209/how-to-call-gesture-tap-on-uiview-programmatically-in-swift check this — Vicky_Vignesh, Feb 21 '20 at 06:34
@rishi also you can convert objective c to swift with https://objectivec2swift.com, if you need. — Picode, Feb 21 '20 at 06:35
Are the labels, UIImageView or UIView in cell or in the viewController? — PGDev, Feb 21 '20 at 06:51
@rishi I updated the link https://iosdevcenters.blogspot.com/2017/05/uitapgesturerecognizer-tutorial-in.html — iOSDev, Feb 21 '20 at 06:56

Taimoor Suleman · Answer 1 · 2020-02-21T06:44:10.980

0

You can use UITapGestureRecognizer

Here is the Sample Code:

  let tap = UITapGestureRecognizer(target: self, action: #selector(actionforView(_:)))
  VIEW.addGestureRecognizer(tap)
  VIEW.isUserInteractionEnabled = true

edited Feb 21 '20 at 06:44

answered Feb 21 '20 at 06:37

Taimoor Suleman

1,588
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score 0 · Answer 2 · edited Feb 21 '20 at 06:39

You can use UITapGestureRecognizer on UILabel, UIImageView etc.

@IBOutlet weak var lblStatus: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()

    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
    lblStatus.isUserInteractionEnabled = true
    lblStatus.addGestureRecognizer(tapGesture)


}

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

}

score 0 · Answer 3 · answered Feb 21 '20 at 06:54

If you want to add UITapGestureRecognizer in tableview or collectionview cell then only add target in the cellForItemAt or cellForRowAt. Allocation and initialization should be placed in awakeFromNib of the custom class of the cell! If you create UITapGestureRecognizer in cellForRowAt then it will initialize every time when cellForRowAt getting called and it is not good practice.

score 0 · Answer 4 · answered Feb 21 '20 at 07:16

I'll try to explain the approach using a customView of type UIView.

In your TableViewCell's awakeFromNib() method, add a UITapGestureRecognizer to the customView with target as self and selector as the relevant method to be called when the customView is tapped, customViewTapped(_:) in the below code.

class TableViewCell: UITableViewCell {
    @IBOutlet weak var customView: UIView!

    override func awakeFromNib() {
        super.awakeFromNib()
        let gesture = UITapGestureRecognizer(target: self, action: #selector(customViewTapped(_:)))
        self.customView.addGestureRecognizer(gesture)
    }

    @objc func customViewTapped(_ gesture: UITapGestureRecognizer) {
        print("customView Tapped")
    }
}

Same thing you can do for UILabel, UIImageView and other view elements.

score 0 · Answer 5 · answered Feb 21 '20 at 08:37

What you can do actually, there are two common practice to have control on ViewCels, since those are views you can simply create and extensions to make your work time less. For example;

//This enum can be extended due to demand
enum GestureRecognizerType {
    case Tap
    case Pinch
    case Rotate
}

extension UIView {
func addRecognizer(_ gType:GestureRecognizerType, handleGesture:Selector, _ controller:UIViewController){
    var recognizer:UIGestureRecognizer!
    switch gType {
    case .Pinch:
        recognizer = UIPinchGestureRecognizer(target: controller, action: handleGesture)
    case .Rotate:
          recognizer = UIRotationGestureRecognizer(target: controller, action: handleGesture)
    case .Tap:
          recognizer = UITapGestureRecognizer(target: controller, action: handleGesture)
    }
    self.addGestureRecognizer(recognizer)
}

Then call wherever you want to. Usage could be like:

override func viewDidLoad(){
    super.viewDidLoad
    let view = UIView()
    view.addRecognizer(.Tap, handleGesture: #selector(handleTap(_:)), self)

}
@objc func handleTap(_ recognizer:UITapGestureRecognizer){
    //Handle when the view tapped
}

The other practice could be handle all inside of your custom cell Class and give them recognisers when they are set using didSet.

how to use addTarget with labels, imageview or uiview?

5 Answers5