Swift add show action to button programmatically - ios

Question

how can I add action to button programmatically. I need to add show action to buttons in mapView. thanks
let button = UIButton(type: UIButtonType.Custom) as UIButton

Answer 1

You can go for below code
`
let btn: UIButton = UIButton(frame: CGRect(x: 100, y: 400, width: 100, height: 50))
btn.backgroundColor = UIColor.green
btn.setTitle("Click Me", for: .normal)
btn.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
btn.tag = 1
self.view.addSubview(btn)
for action
#objc func buttonAction(sender: UIButton!) {
let btnsendtag: UIButton = sender
if btnsendtag.tag == 1 {
dismiss(animated: true, completion: nil)
}
}

Answer 2

let button = UIButton(type: UIButtonType.Custom) as UIButton
button.addTarget(self, action: "action:", forControlEvents: UIControlEvents.TouchUpInside)
//then make a action method :
func action(sender:UIButton!) {
print("Button Clicked")
}

Answer 3

You need to add a Target to the button like Muhammad suggest
button.addTarget(self, action: "action:", forControlEvents: UIControlEvents.TouchUpInside)
But also you need a method for that action
func action(sender: UIButton) {
// Do whatever you need when the button is pressed
}

Answer 4

For swift 5 users can do by this simple way
cell.followButton.tag = 10
cell.followButton.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
#objc func buttonAction(sender: UIButton!) {
let id = sender.tag
print(id)
}

Answer 5

in addition to the above, the new ios14 introduce
if #available(iOS 14.0, *) {
button.addAction(UIAction(title: "Click Me", handler: { _ in
print("Hi")
}), for: .touchUpInside)
} else {
// Fallback on earlier versions
}

Answer 6

override func viewDidLoad() {
super.viewDidLoad()
let btn = UIButton()
btn.frame = CGRectMake(10, 10, 50, 50)
btn.setTitle("btn", forState: .Normal)
btn.setTitleColor(UIColor.redColor(), forState: .Normal)
btn.backgroundColor = UIColor.greenColor()
btn.tag = 1
btn.addTarget(self, action: "btnclicked:", forControlEvents: .TouchUpInside) //add button action
self.view.addSubview(btn)
}

Answer 7

For Swift 4 use following:
button.addTarget(self, action: #selector(AwesomeController.coolFunc(_:)), for: .touchUpInside)
//later in your AswesomeController
#IBAction func coolFunc(_ sender:UIButton!) {
// do cool stuff here
}