Volkan Elçi Volkan Elçi - 13 days ago 8
iOS Question

How to add long press gesture recognizer to a button inside of tableview cell?

I am trying to add a long press gesture recognizer to a button inside a tableview cell. But i could not figure out what i am doing wrong. I want my button to play a different audio file when user taps and holds the button.

MY CODE

import UIKit
import AVFoundation

class ViewController6: UIViewController, UITableViewDataSource, UITableViewDelegate
{

var player = AVQueuePlayer()


@IBOutlet var tableView: UITableView!

override func viewDidLoad()
{
super.viewDidLoad()
}

override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
}


//Functions for tableView

//Cell - For Rifles

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return (arrayOfRifles.count)
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell6 = tableView.dequeueReusableCell(withIdentifier: "cell6", for: indexPath) as! ViewControllerTableViewCell6

cell6.myImage.image = UIImage(named: arrayOfRifles[indexPath.row] + ".jpg")
cell6.myButton.setTitle(buttonDataRifles[indexPath.row], for: UIControlState.normal)
cell6.myButton.tag = indexPath.row
cell6.myButton.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
cell6.myButton.addGestureRecognizer(longPressGesture)
return cell6

}

func longPressGesture() {
let lpg = UILongPressGestureRecognizer(target: self, action: "longPress")
lpg.minimumPressDuration = 0.5
}

func longPress(_ sender: UIButton) {
if let url = Bundle.main.url(forResource: soundArrayRiflesUzun[(sender as AnyObject).tag], withExtension: "mp3")
{
player.removeAllItems()
player.insert(AVPlayerItem(url: url), after: nil)
player.play()

}

}

//Action for Sounds


@IBAction func buttonAction(_ sender: UIButton)
{

if let url = Bundle.main.url(forResource: soundArrayRifles[sender.tag], withExtension: "mp3")
{
player.removeAllItems()
player.insert(AVPlayerItem(url: url), after: nil)
player.play()

}

}

}


I am getting an error in this line

cell6.myButton.addGestureRecognizer(longPressGesture)

Answer

Do like this,

cell6.myButton.addTarget(self, action: #selector(ViewController6.buttonAction(_:)), for: .touchUpInside)
cell6.myButton.addGestureRecognizer(self.longPressGesture())

func longPressGesture() -> UILongPressGestureRecognizer {
    let lpg = UILongPressGestureRecognizer(target: self, action: #selector(ViewController6.longPress))
    lpg.minimumPressDuration = 0.5
    return lpg
}

func longPress(_ sender: UILongPressGestureRecognizer) {
    if let url = Bundle.main.url(forResource: soundArrayRiflesUzun[sender.view.tag], withExtension: "mp3")
    {
        player.removeAllItems()
        player.insert(AVPlayerItem(url: url), after: nil)
        player.play()

    }

}