如何在Swift4中不使用Objective-C的情况下向标签添加动作

Question

Objective-C functions

@objc func handleTapHash(gestureRecognizer: UIGestureRecognizer) {

        NotificationCenter.default.post(name: NSNotification.Name("ViewerOfHash"), object: nil)



    }
@objc func ViewerOfHash() {

        performSegue(withIdentifier: "ViewerOfHash", sender: nil)

        PassDataController.addData(newData: "12300")
        MainVC.tof = 1

    }

Add action to label(hashTag.hashTag1)

let gestureRecognizer1 = UITapGestureRecognizer(target: self, action: #selector(self.handleTapHash))
hashTag.hashTag1.addGestureRecognizer(gestureRecognizer1)

It works, but I don't want to use objective-c and NS functions.

There is a label that send some data to another page in my code.

How can I change my code to Swift4 fully?

Answer 1

Unfortunately, @objc is required because you're using Selectors in target:action: . The ObjC runtime is required in order to lookup the method implementation for a given Selector .