Call number when double tap on label

When you show some parts of your class, please include the class header.

And use the code insertion feature of this site shown as `< >`.

When a `UIGestureRecognizer` detected its gesture and invokes its action method, iOS passes the gesture recognizer itself as an argument.

So, you can use its `view` property as the source view of the gesture, in your double tap case, it is `UILabel`.

    @objc func doubleTap(_ gestureRecognizer: UIGestureRecognizer) {
        let theLabel = gestureRecognizer.view as! UILabel
        let phone = theLabel.text ?? ""
        callNumber(phonenumber: phone)
    }

Thanks for the reply.

Noted to insert code with <>

if i tried your code i got :

Could not cast value of type 'UIView' (0x1f20f9408) to 'UILabel' (0x1f20f8c10)

I assume this line :

let theLabel = gestureRecognizer.view as! UILabel

detect which label I double tap?

Thanks

I created the gesture in IB. I tested and it works.

What do you get with:

let theLabel = (tapGesture.view as? UILabel)?.text ?? "Nothing"

you mean if i do a print(theLabel) ?

If that, I got "Nothing"

Logic with the problem you have.

Could you add those print:

          print("tapGesture", tapGesture)
          print("tapGesture.view", tapGesture.view)

and tell what you get.

Should be somethings like:

tapGesture Optional(<UITapGestureRecognizer: 0x6000033e8b00; state = Possible; view = <UILabel 0x7febb9d222d0>>)

tapGesture.view Optional(<UILabel: 0x7febb9d222d0; frame = (135.5 151; 42 20.5); text = '₹ 4.752.000'; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; gestureRecognizers = <NSArray: 0x600000181ce0>; layer = <_UILabelLayer: 0x600002ce1bd0>>)

In your shown code, you have two use cases on `

addGestureRecognizer`.

One is for `view`, which may not be a `UILabel`:

view.addGestureRecognizer(longPressGesture)

Another is for `lbl2`, which definitely is a `UILabel`:

lbl2.addGestureRecognizer(doubleTapGesture)

So, I have shown you only one alternative for `

doubleTapGesture` which may call `doubleTap(_:)`.

If you have some hidden code, which adds `

doubleTapGesture` on non-UILabel, my code would not work.

But I cannot say any more for such hidden codes. If you want to get something sure, please show all relevant codes.

Hi,

Here my entire code

import UIKit

class ThirdViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
   
    
    let countrylists = [
        "",
        "Dubai",
        "Geneva",
        "Singapore"]
    
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return countrylists.count
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return countrylists[row]
    }
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        let selection = countrylists[row]
        switch selection {
        case "Dubai":
            lbl2.text = "999"
            lbl3.text = "998"
            lbl4.text = "997"
                    
        case "Geneva":
            lbl2.text = "117"
            lbl3.text = "118"
            lbl4.text = "144"
        

        case "Singapore":
            lbl2.text = "999"
            lbl3.text = "998"
            lbl4.text = "997"
        

        default:
            lbl2.text = selection
        }
    }
    
    
    @IBOutlet weak var lbl2: UILabel!
    @IBOutlet weak var lbl3: UILabel!
    @IBOutlet weak var lbl4: UILabel!
    
    @IBOutlet weak var pvemergency: UIPickerView!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        pvemergency.dataSource = self
        pvemergency.delegate = self
        
        lbl2.isUserInteractionEnabled = true
        lbl3.isUserInteractionEnabled = true
        lbl4.isUserInteractionEnabled = true
        
        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.longPress))
        view.addGestureRecognizer(longPressGesture)
        //lbl3.addGestureRecognizer(longPressGesture)
        //lbl4.addGestureRecognizer(longPressGesture)
        
        longPressGesture.minimumPressDuration = 2.0
        
        let doubleTapGesture =  UITapGestureRecognizer(target: self, action: #selector(self.doubleTap))
        
        
        
        view.addGestureRecognizer(doubleTapGesture)
        //lbl3.addGestureRecognizer(doubleTapGesture)
        //lbl4.addGestureRecognizer(doubleTapGesture)
        
        doubleTapGesture.numberOfTapsRequired = 2
        
        
        
    }
    
    @objc func longPress(){
        //let phone = String(lbl2.text!)
        //callNumber(phonenumber: phone)
        UIPasteboard.general.string = lbl2.text //here i will need to detect which label i press
        createAlert(title: "Infos", message: "Copied")
    }
    
    @objc func doubleTap (){
        lbl2.text = "double tap" //same here, need to detect which label i double tap
        let phone = String(lbl2.text!)
        
        callNumber(phonenumber: phone)
        //UIPasteboard.general.string = lbl2.text
   }
    

    
    func callNumber (phonenumber:String)
    {
        if let phoneCallURL = URL(string: "tel://\(phonenumber)"){
            
            let application:UIApplication = UIApplication.shared
            
            if (application.canOpenURL(phoneCallURL)){
                application.open(phoneCallURL,options: [:], completionHandler: nil)
            }
        }
        
    }
    
    func createAlert(title:String, message:String){
        
        let msgalert = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.alert )
        msgalert.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.default, handler: { (action) in
            msgalert.dismiss(animated: true, completion: nil)
        }))
        self.present(msgalert, animated: true, completion: nil)
        
    }

Thanks

doiubleTap is not on label, but on whole view. Is it your intent ?

Hi,

At the end I used Gesture from story board and I make 2 @IBAction (for each gesture) and it works

and it much easier and less coding.

So, you have changed the core part of your code.

In your original post:

let doubleTapGesture =  UITapGestureRecognizer(target: self, action: #selector(self.doubleTap))
lbl2.addGestureRecognizer(doubleTapGesture)
 
doubleTapGesture.numberOfTapsRequired = 2

You called `

addGestureRecognizer` on `lbl2`.

And in your new code:

       let doubleTapGesture =  UITapGestureRecognizer(target: self, action: #selector(self.doubleTap))  



        view.addGestureRecognizer(doubleTapGesture)  
        //lbl3.addGestureRecognizer(doubleTapGesture)  
        //lbl4.addGestureRecognizer(doubleTapGesture)  

        doubleTapGesture.numberOfTapsRequired = 2 

You call `addGestureRecognizer` on `view`, those two are completely different codes.

If you change such an important part silently, no one can help you.