CODEWITHSUNDEEP
iosswiftselectoruibarbuttonitem
giograno
giograno

Reputation: 1809

#selector on UIBarButtonItem

I'm developing my first iOS app in Swift 2.2 and I have the following problem. In an utility class, I have the following static method, called by some different UIViewController.

static func setNavigationControllerStatusBar(myView: UIViewController, title: String, color: CIColor, style: UIBarStyle) {
    let navigation = myView.navigationController!
    navigation.navigationBar.barStyle = style
    navigation.navigationBar.barTintColor = UIColor(CIColor: color)
    navigation.navigationBar.translucent = false
    navigation.navigationBar.tintColor = UIColor.whiteColor()
    myView.navigationItem.title = title
    
    let menuButton = UIBarButtonItem(image: UIImage(named: "menu"),
                                 style: UIBarButtonItemStyle.Plain ,
                                 target: self, action: #selector("Utils.menuClicked(_:)"))
    
    myView.navigationItem.leftBarButtonItem = menuButton
}

func menuClicked(sender: UIButton!) {
    // do stuff
}

I'm trying in some different ways to associate a #selector for this button, however I always have the following error.

enter image description here

Upvotes: 0

Views: 2068

Answers (2)

Code
Code

Reputation: 6251

No quotes.

#selector(Utils.menuClicked(_:))

func menuClicked should be in your view controller class. But if for some reason it isn't, you can do

class Utils {
    static let instance = Utils()

    let menuButton = UIBarButtonItem(image: UIImage(named: "menu"),
                                     style: UIBarButtonItemStyle.Plain ,
                                     target: Utils.instance, action: #selector(Utils.menuClicked(_:)))

    @objc func menuClicked(sender: UIBarButtonItem) {
        // do stuff
    }
}

Upvotes: 1

Santosh
Santosh

Reputation: 2914

Swift 2.2 deprecates using strings for selectors and instead introduces new syntax: #selector. Using #selector will check your code at compile time to make sure the method you want to call actually exists. Even better, if the method doesn’t exist, you’ll get a compile error: Xcode will refuse to build your app, thus banishing to oblivion another possible source of bugs.

So remove the double quote for your method in #selector. It should work!

Upvotes: 1

Related Questions