How to programmatically set action for barButtonItem in swift 3?

Question

Here is what I used previously,

var barButtonItem = UIBarButtonItem(image: backImgs, style: UIBarButtonItemStyle.plain, target: self, action: Selector("menuButtonTapped:"))

But there is some syntax changes for Swift 3.

score 119 · Accepted Answer · answered Sep 29 '16 at 11:10

119

ex:-

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))

answered Sep 29 '16 at 11:10

Tony Vincent

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8

I would click on the up arrow but it's at 69 so we'll leave it for now. – J Derbs Nov 10 '18 at 21:57
1

@JackDerbis – Tony Vincent Nov 13 '18 at 12:54

score 62 · Answer 2 · answered Nov 10 '16 at 14:52

Summarize the mostly used method in Swift 3 for adding action to a barButton.

Barbutton with text

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))

BarButton with your own image

navigationItem.rightBarButtonItem = UIBarButtonItem(image: UIImage(named:"add"), style: .plain, target: self, action: #selector(addTapped))

BarButton with system image

navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))

score 38 · Answer 3 · answered Apr 25 '17 at 16:00

38

If anyone is using customView:

barButtonItem.customView?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(onBarButtonItemClicked)))

answered Apr 25 '17 at 16:00

Onuray Sahin

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This is what will work if you need to add the gesture recognizer to a bar button item when using the `customView` initializer. As far as I've found only this method signature will work (adding the gesture to the view itself/to the bar button/anything else didn't work for me). – Scott O'Toole Jan 27 '19 at 06:46

score 14 · Answer 4 · answered Sep 29 '16 at 11:18

14

You just need to change your selector syntax as of from Swift 3 you need to specify the first parameter name of method in your function call so change your selector like this.

#selector(menuButtonTapped(sender:))

And your method should be like this.

func menuButtonTapped(sender: UIBarButtonItem) {

}

answered Sep 29 '16 at 11:18

Nirav D

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From swift 3, I have to specify first parameter, but I don't need to do this.. anyway, thanks – Bhanupriya Sep 29 '16 at 11:28
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@Bhanupriya Yes you can but for that you need to use `_` with selector `#selector(menuButtonTapped(_:))` and also need to add `_` as first parameter to your method like `func menuButtonTapped(_ sender: UIBarButtonItem) {` either one of the option you have to use other wise it will not work. – Nirav D Sep 29 '16 at 11:37
@Bhanupriya Are you getting what i have tell you about selector in above comment? – Nirav D Sep 29 '16 at 11:56
No, I don't need to. what I need is as follows: var barButtonItem = UIBarButtonItem(image: backImgs, style: .plain, target: self, action: #selector(menuButtonTapped)) – Bhanupriya Sep 29 '16 at 12:35
@Bhanupriya then why you are previously try `Selector("menuButtonTapped:")` here `:` means method contain one parameter that is the reason i have given answer this way. – Nirav D Sep 29 '16 at 12:41

score 12 · Answer 5 · edited Mar 23 '17 at 10:12

12

One line of code on Swift 3 for iOS 10.1:

navigationController?.navigationBar.topItem?.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: nil)

edited Mar 23 '17 at 10:12

Arpit Dongre

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answered Oct 31 '16 at 23:10

Marco Aurelio Americo

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score 8 · Answer 6 · answered Sep 29 '16 at 11:21

let barButtonItem = UIBarButtonItem(image: UIImage(named: "backImgs"),
                                            style: .plain,
                                            target: self,
                                            action: #selector(menuButtonTapped))

// Adding button to navigation bar (rightBarButtonItem or leftBarButtonItem)
self.navigationItem.rightBarButtonItem = barButtonItem

 // Private action
@objc fileprivate func menuButtonTapped() { // body method here }

score 8 · Answer 7 · answered May 15 '19 at 12:49

8

If someone is looking for a way to set the action on an existing button (Swift 5):

if let leftBarButtonItem = navigationItem.leftBarButtonItem {
    leftBarButtonItem.target = self
    leftBarButtonItem.action = #selector(onBack(_:))
}


@IBAction func onBack(_ sender: AnyObject) {
    _ = navigationController?.popViewController(animated: true)
}

answered May 15 '19 at 12:49

ergunkocak

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Great. It's also for Swift 4 and lower versions. – Wei WANG May 17 '19 at 06:18

score 6 · Answer 8 · answered Jun 16 '17 at 06:21

create an extension for barbutton item.

 extension UINavigationItem {
    func addSettingButtonOnRight(){
       let button = UIButton(type: .Custom)
       button.setTitle("setting", forState: .Normal)
       button.titleLabel?.font = UIFont.systemFontOfSize(15.0)
       button.layer.cornerRadius = 5
       button.backgroundColor = UIColor.grayColor()
       button.frame = CGRect(x: 0, y: 0, width: 100, height: 25)
       button.addTarget(self, action: #selector(gotSettingPage), forControlEvents: UIControlEvents.TouchUpInside)
       let barButton = UIBarButtonItem(customView: button)

       self.rightBarButtonItem = barButton
   }

   func gotSettingPage(){

   }
 }

And call it from viewDidLoad()

 self.navigationItem.addSettingButtonOnRight()

score 6 · Answer 9 · answered Nov 14 '17 at 08:34

In Swift 3, you can add UIBarButtonItem like that,

let addButton = UIBarButtonItem(image:UIImage(named:"your_icon_name"), style:.plain, target:self, action:#selector(YourControllerName.buttonAction(_:)))
addButton.tintColor = UIColor.white
self.navigationItem.rightBarButtonItem = addButton

And handle button action like that,

func buttonAction(_ sender: UIBarButtonItem) {

}

Hope it helps.

score 6 · Answer 10 · edited Jun 19 '18 at 17:05

6

for Swift 4 add in viewDidLoad:

navigationItem.rightBarButtonItem = UIBarButtonItem(
    barButtonSystemItem: UIBarButtonSystemItem.add, 
    target: self, 
    action: #selector(addTransaction)
)

edited Jun 19 '18 at 17:05

Tim Diekmann

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answered Jun 19 '18 at 15:30

pankaj nigam

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score 4 · Answer 11 · answered Sep 23 '19 at 05:49

In Swift 5

//For righter button item
let rightBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod))//Change your function name and image name here
self.navigationItem.rightBarButtonItem = rightBtn
//self.navigationItem.rightBarButtonItem = [rightBtn, anotherBtn] //If you want to add more buttons add like this

//For left bar button item
let leftBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod)) //Change your function name and image name here
self.navigationItem.leftItemsSupplementBackButton = true
self.navigationItem.leftBarButtonItem = leftBtn
//self.navigationItem.leftBarButtonItems = [leftBtn, anotherBtn] //If you want to add more buttons add like this

//This is your function name
@objc func onClickMethod() {
    print("Left bar button item")
}

score 1 · Answer 12 · answered Apr 10 '17 at 05:00

Make a UIBarButtonItem:

let rightButton: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(LocationViewController.doneButtonClicked(_:)))

Add to NavigationItem:

self.navigationItem.rightBarButtonItem = rightButton

Associated function:

func doneButtonClicked(_ button:UIBarButtonItem!){    
    print("Done clicked")    
}

How to programmatically set action for barButtonItem in swift 3?

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