CODEWITHSUNDEEP
iosswiftuitapgesturerecognizer
Louis Brahmi
Louis Brahmi

Reputation: 862

Adding tap Gesture that calls a function in another class

I added a UITapGestureRecognizer to an element. I want that function called after the tap gesture was recognized is in another class.

This is my code :

let selectMoment = SelectMomentClass(countUserMoment: 1, cardView: self.cardView)
selectMoment.draw()
let gesture = UITapGestureRecognizer(target: self, action: #selector(selectMoment.selectMomentAction))
cardView.addGestureRecognizer(gesture)

and my SelectMomentClass contains my function:

@objc func selectMomentAction(sender : UITapGestureRecognizer) {
    print("card selectMoment is Tapped")
}

But when I run the code I have this error:

unrecognized selector sent to instance

Where does my code go wrong? This is the target parameter that I need to change. Can I called a function in another class?

I found a similar question in Objective-C but it does not help me.

Upvotes: 1

Views: 1538

Answers (2)

Shehata Gamal
Shehata Gamal

Reputation: 100533

Since the object is a local variable it's deallocated after functions ends so make it an instance variable inside its class

let selectMoment = SelectMomentClass(countUserMoment: 1, cardView: self.cardView)

Upvotes: 0

vivekDas
vivekDas

Reputation: 1288

Use this.Your method is defined in selectMomentClass class then you must add target as selectMomentClass object and selecter as #selector(selectMoment.SelectPictureAction).

let selectMoment = SelectMomentClass(countUserMoment: 1, cardView: self.cardView)
let gesture = UITapGestureRecognizer(target: selectMoment, action: #selector(selectMoment.SelectPictureAction(_:)))

Method Signature as below in the selectMomentClass.

@objc func selectPictureAction(_ sender : UITapGestureRecognizer) {
        print("card selectMoment is Tapped")
}

Upvotes: 1

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