ios Cannot convert value of type '()' to expected argument type 'String' swift 3

Question

I have updated my code to Swift 3 and now getting the error above. I think there is something wrong with the way selector is called. Anyone please help me, What is wrong.

Found that link where it is all explained. [Using Swift with Cocoa and Objective-C Swift 3](https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithObjective-CAPIs.html) — Adnan Asghar, Sep 17 '16 at 09:46
Possible duplicate of [@selector() in Swift?](http://stackoverflow.com/questions/24007650/selector-in-swift) — Eric Aya, Sep 17 '16 at 09:50

score 12 · Answer 1 · answered Sep 17 '16 at 09:38

12

Just change your selector syntax with swift 3 selector syntax like this.

 #selector(self.hideKeyboard)

answered Sep 17 '16 at 09:38

Nirav D

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score 5 · Answer 2 · answered Sep 17 '16 at 09:50

The syntax for Selector has been changed in Swift 3. You don't need to add round brackets after selector name if there is no parameter in the selector.

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(hideKeyboard))
self.view.addGestureRecognizer(tapGesture)

score 0 · Answer 3 · answered Jan 11 '19 at 12:00

For anyone looking for a solution can try this.

let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
view.addGestureRecognizer(tap)

// function which is triggered when handleTap is called
 func handleTap(_ sender: UITapGestureRecognizer) {
     print("Hello World")
  }

I know it's loo late to answer, but it can help others.

ios Cannot convert value of type '()' to expected argument type 'String' swift 3

3 Answers3