Long Press & Tap Recognizer for multiple UIButtons - uibutton

Question

I have Multiple Buttons on my UI, and I want to execute different functions according to different types of click,
Single Click
Double Click
Long Press
Doing it for single tap was easy for me, an IBAction with all the four buttons connected to it, but for the other types of clicks i was stuck,
I understand that i need to use the tap gesture recognizer, but I'm unable to set it to multiple UIButtons,
Here is and example of what I want to do
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var Label: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func ButtonSingleTap(sender:UIButton!) {
let ButtonNumber: String = String(sender.tag)
Label.text = "Button " + ButtonNumber + " is Single Tapped"
}
func ButtonDoubleTap(sender:UIButton!) {
let ButtonNumber: String = String(sender.tag)
Label.text = "Button " + ButtonNumber + " is Double Tapped"
}
func ButtonLongTap(sender:UIButton!) {
let ButtonNumber: String = String(sender.tag)
Label.text = "Button " + ButtonNumber + " is Long Pressed"
}
}

Answer 1

You cannot use one instance of UIGestureRecognizer for several buttons. Each button needs its own set of gesture recognizers.
Here is an example to show you how to do it:
for button in [button1, button2, button3, button4] {
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: Selector("didLongPress:"))
let doubleTapRecognizer = UITapGestureRecognizer(target: self, action: Selector("didDoubleTap:"))
doubleTapRecognizer.numberOfTapsRequired = 2
button.addGestureRecognizer(longPressRecognizer)
button.addGestureRecognizer(doubleTapRecognizer)
}
func didLongPress(recognizer: UILongPressGestureRecognizer) {
guard let button = recognizer.view as? UIButton else { return }
switch recognizer.state {
case .Began:
print("long press began button \(button.tag)")
case .Ended:
print("long press ended button \(button.tag)")
default:
break
}
}
func didDoubleTap(recognizer: UITapGestureRecognizer) {
guard let button = recognizer.view as? UIButton else { return }
print("double tap button \(button.tag)")
}
For this to work you have to add Outlets for your buttons (button1, button2, button3, button4).