How to get UILabel to respond to tap?

Question

I have discovered that I can create UILabel much faster than UITextField and I plan to use UILabel most of the time for my data display app.

To make a long story short though, I wish to let the user tap on a UILabel and have my callback respond to that. Is that possible?

Thanks.

Victual

You need to specify userInteractionEnabled = true – Anamorphic

Answer 1

You can add a UITapGestureRecognizer instance to your UILabel.

For example:

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelTapped)];
tapGestureRecognizer.numberOfTapsRequired = 1;
[myLabel addGestureRecognizer:tapGestureRecognizer];
myLabel.userInteractionEnabled = YES;

Malefaction

Aha, the 'userInteractionEnabled' property here is key (since the other configuration can and should preferably be set in storyboards). Label's default the interaction to off so as to pass through touches through them - but in this case they need to observe touches for the gesture recognizer to activate. Thanks! – Discriminating

Nice one! I was just throwing a tap onto a label and totally forgot to enable user interaction. Thanks! – Prerequisite

Answer 2

If you're using storyboards you can do this entire process in the storyboard with no additional code. Add a label to the storyboard, then add a tap gesture to the label. In the Utilities pane, make sure "User Interaction Enabled" is checked for the label. From the tap gesture (at the bottom of your view controller in the storyboard), ctrl+click and drag to your ViewController.h file and create an Action. Then implement the action in the ViewController.m file.

Octachord

Method also available using interface builder alone without storyboards – Arithmetic

Make sure "User Interaction Enabled" is checked under the View section in the Attributes inspector, not just the Accessibility Traits. – Sternmost

Answer 3

Swift 3.0

Initialize the gesture for tempLabel

tempLabel?.text = "Label"
let tapAction = UITapGestureRecognizer(target: self, action: #selector(self.actionTapped(_:)))
tempLabel?.isUserInteractionEnabled = true
tempLabel?.addGestureRecognizer(tapAction)

Action receiver

func actionTapped(_ sender: UITapGestureRecognizer) {
    // code here
}

Swift 4.0

Initialize the gesture for tempLabel

tempLabel?.text = "Label"
let tapAction = UITapGestureRecognizer(target: self, action:@selector(actionTapped(_:)))
tempLabel?.isUserInteractionEnabled = true
tempLabel?.addGestureRecognizer(tapAction)

Action receiver

func actionTapped(_ sender: UITapGestureRecognizer) {
    // code here
}

Domela

How to get the label text from the sender object ? In other words how to identify the sender? – Spinks

Swift 4 version has @selector instead of #selector. – Gittel

Answer 4

Swift 2.0:

I am adding a nsmutable string as sampleLabel's text, enabling user interaction, adding a tap gesture and trigger a method.

override func viewDidLoad() {
    super.viewDidLoad()

    let newsString: NSMutableAttributedString = NSMutableAttributedString(string: "Tap here to read the latest Football News.")
    newsString.addAttributes([NSUnderlineStyleAttributeName: NSUnderlineStyle.StyleDouble.rawValue], range: NSMakeRange(4, 4))
    sampleLabel.attributedText = newsString.copy() as? NSAttributedString

    let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "tapResponse:")
    tapGesture.numberOfTapsRequired = 1
    sampleLabel.userInteractionEnabled =  true
    sampleLabel.addGestureRecognizer(tapGesture)

}
func tapResponse(recognizer: UITapGestureRecognizer) {
    print("tap")
}

Franzen

Answer 5

You could use a UIButton instead and set the text to what you want. The button doesn't have to look like a button if you don't want to

Raeannraeburn

As regards that, I have always had trouble with UIButton left-justifying multi-line text. Even when I set the left alignment to center it still happens. – Victual

I did give UIButton a try though and it is pretty nice. It's just the multi-line buttons that are a problem. Thanks. – Victual

Answer 6

To add Tap gesture on UILable

UITapGestureRecognizer *tapAction = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(lblClick:)];
tapAction.delegate =self;
tapAction.numberOfTapsRequired = 1;

//Enable the lable UserIntraction
lblAction.userInteractionEnabled = YES;
[lblAction addGestureRecognizer:tapAction];   

and to assess the selector method

- (void)lblClick:(UITapGestureRecognizer *)tapGesture {

}

Note: Add UIGestureRecognizerDelegate in .h file

Walloon

Answer 7

Swift Version: var tapGesture : UITapGestureRecognizer = UITapGestureRecognizer()

Then inside viewDidLoad(),add this:

  let yourLbl=UILabel(frame: CGRectMake(x,y,width,height)) as UILabel!

    yourLbl.text = "SignUp"
    tapGesture.numberOfTapsRequired = 1
    yourLbl.addGestureRecognizer(tapGesture)
    yourLbl.userInteractionEnabled = true
    tapGesture.addTarget(self, action: "yourLblTapped:")

Simas

Answer 8

This works great in Xcode 12 and Swift 5

let tapAction = UITapGestureRecognizer(target: self,action:#selector(actionTapped(_:)))

userLabel?.isUserInteractionEnabled = true

userLabel?.addGestureRecognizer(tapAction)

And action method like -

@objc func actionTapped(_ sender: UITapGestureRecognizer) {
        print("tapped")
    }

Francescafrancesco

Answer 9

If you want to use Multi line text in your button then create a UILabel with Multiline text and add as a subview in to your button.

for eg:

yourLabel=[Uilabel alloc]init];
yourLabel.frame=yourButtom.Frame;//(frame size should be equal to your button's frame)
[yourButton addSubView:yourLabel]

Expander

Answer 10

Swift 3 from Alvin George

override func viewDidLoad() {
    super.viewDidLoad()
    let newsString: NSMutableAttributedString = NSMutableAttributedString(string: "Tap here to read the latest Football News.")
    newsString.addAttributes([NSUnderlineStyleAttributeName: NSUnderlineStyle.styleDouble.rawValue], range: NSMakeRange(4, 4))
    sampleLabel.attributedText = newsString.copy() as? NSAttributedString

    let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapResponse))
    tapGesture.numberOfTapsRequired = 1
    sampleLabel.isUserInteractionEnabled =  true
    sampleLabel.addGestureRecognizer(tapGesture)
}

func tapResponse(recognizer: UITapGestureRecognizer) {
    print("tap")
}

Sumikosumma

Answer 11

Swift version looks like this:

func addGestureRecognizerLabel(){
    //Create a instance, in this case I used UITapGestureRecognizer,
    //in the docs you can see all kinds of gestures
    let gestureRecognizer = UITapGestureRecognizer()

    //Gesture configuration
    gestureRecognizer.numberOfTapsRequired = 1
    gestureRecognizer.numberOfTouchesRequired = 1
    /*Add the target (You can use UITapGestureRecognizer's init() for this)
    This method receives two arguments, a target(in this case is my ViewController) 
    and the callback, or function that you want to invoke when the user tap it view)*/
    gestureRecognizer.addTarget(self, action: "showDatePicker")

    //Add this gesture to your view, and "turn on" user interaction
    dateLabel.addGestureRecognizer(gestureRecognizer)
    dateLabel.userInteractionEnabled = true
}

//How you can see, this function is my "callback"
func showDatePicker(){
    //Your code here
    print("Hi, was clicked")
}

//To end just invoke to addGestureRecognizerLabel() when
//your viewDidLoad() method is called

override func viewDidLoad() {
    super.viewDidLoad()
    addGestureRecognizerLabel()
}

Starobin

Answer 12

I personally prefer the method of writing an extension for UILabel. This is what I use.

import UIKit

extension UILabel {
    /**
     * A map of actions, mapped as [ instanceIdentifier : action ].
     */
    private static var _tapHandlers = [String:(()->Void)]()

    /**
     * Retrieve the address for this UILabel as a String.
     */
    private func getAddressAsString() -> String {
        let addr = Unmanaged.passUnretained(self).toOpaque()
        return "\(addr)"
    }

    /**
     * Set the on tapped event for the label
     */
    func setOnTapped(_ handler: @escaping (()->Void)) {
        UILabel._tapHandlers[getAddressAsString()] = handler
        let gr = UITapGestureRecognizer(target: self, action: #selector(onTapped))
        gr.numberOfTapsRequired = 1
        self.addGestureRecognizer(gr)
        self.isUserInteractionEnabled = true
    }

    /**
     * Handle the tap event.
     */
    @objc private func onTapped() {
        UILabel._tapHandlers[self.getAddressAsString()]?()
    }
}

You would then use it like this from any UILabel instance:

myLabel.setOnTapped {
    // do something
}

This can potentially cause some memory leaks I believe, but I haven't determined how best to resolve them yet.

Bannerol