UIButton action in table view cell

Question

I am trying to run an action for a button being pressed within a table view cell  The following code is in my table view controller class    The button has been described as  yes  in an outlet in my class of UITableViewCell called requestsCell   I am using Parse to save data and would like to update an object when the button is pressed  My objectIds array works fine  the cell yes tag also prints the correct number to the logs  however  I cannot get that number into my  connected  function in order to run my query properly    I need a way to get the indexPath row of the cell to find the proper objectId        override func tableView tableView  UITableView  cellForRowAtIndexPath indexPath  NSIndexPath  - gt  UITableViewCell       let cell   tableView dequeueReusableCellWithIdentifier  cell   forIndexPath  indexPath  as requestsCell         Configure the cell         cell name text   requested indexPath row       imageFiles indexPath row  getDataInBackgroundWithBlock           imageData  NSData   error  NSError   - gt  Void in          if error    nil                let image   UIImage data  imageData               cell userImage image   image          else              println  not working                            cell yes tag   indexPath row     cell yes targetForAction  connected   withSender  self       println cell yes tag       return cell     func connected sender  UIButton          var query   PFQuery className  Contacts       query getObjectInBackgroundWithId objectIDs sender tag              gameScore  PFObject   error  NSError   - gt  Void in         if error    nil               NSLog       error            else               gameScore  connected      yes              gameScore save

User · Answer

We can create a closure for the button and use that in cellForRowAtIndexPath

class ClosureSleeve {
  let closure: () -> ()

  init(attachTo: AnyObject, closure: @escaping () -> ()) {
    self.closure = closure
    objc_setAssociatedObject(attachTo, "[\(arc4random())]", self,.OBJC_ASSOCIATION_RETAIN)
}

@objc func invoke() {
   closure()
 }
}

extension UIControl {
func addAction(for controlEvents: UIControlEvents = .primaryActionTriggered, action: @escaping () -> ()) {
  let sleeve = ClosureSleeve(attachTo: self, closure: action)
 addTarget(sleeve, action: #selector(ClosureSleeve.invoke), for: controlEvents)
 }
}

And then in cellForRowAtIndexPath

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
    let cell = youtableview.dequeueReusableCellWithIdentifier(identifier) as? youCell
    cell?.selectionStyle = UITableViewCell.SelectionStyle.none//swift 4 style

      button.addAction {
       //Do whatever you want to do when the button is tapped here
        print("button pressed")
      }

    return cell
 }

User · Answer

Simple and easy way to detect button event and perform some action  class youCell  UITableViewCell       var yourobj       - gt  Void     nil        You can pass any kind data also       var user    String   - gt  Void     nil       override func awakeFromNib                     super awakeFromNib                IBAction func btnAction sender  UIButton                if let btnAction   self yourobj                       btnAction                 user   pass string                      func tableView tableView  UITableView  cellForRowAtIndexPath indexPath  NSIndexPath  - gt  UITableViewCell               let cell   youtableview dequeueReusableCellWithIdentifier identifier  as  youCell         cell  selectionStyle   UITableViewCellSelectionStyle None  cell   yourobj                                   Do whatever you want to do when the button is tapped here                 self view addSubview self someotherView             cell user     string in             print string             return cell

User · Answer

As Apple DOC     targetForAction withSender  Returns the target object that responds to   an action    You can t use that method to set target for UIButton  Try  addTarget   action forControlEvents   method

User · Answer

class TableViewCell  UITableViewCell       IBOutlet weak var oneButton  UIButton      IBOutlet weak var twoButton  UIButton      class TableViewController  UITableViewController      override func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell       let cell   tableView dequeueReusableCell withIdentifier   Cell   for  indexPath  as  TableViewCell      cell oneButton addTarget self  action   selector TableViewController oneTapped       for   touchUpInside      cell twoButton addTarget self  action   selector TableViewController twoTapped       for   touchUpInside       return cell    func oneTapped   sender  Any          print  Tapped      func twoTapped   sender  Any          print  Tapped

User · Answer

in Swift 4  in cellForRowAt indexPath    cell prescriptionButton addTarget self  action  Selector  onClicked     for   touchUpInside    function that run after user pressed button    objc func onClicked sender  UIButton           let tag   sender tag

User · Answer

The accepted answer using button tag as information carrier which button has actually been pressed is solid and widely accepted but rather limited since a tag can only hold Ints   You can make use of Swift s awesome closure-capabilities to have greater flexibility and cleaner code   I recommend this article  How to properly do buttons in table view cells using Swift closures by Jure Zove   Applied to your problem    Declare a variable that can hold a closure in your tableview cell like   var buttonTappedAction     UITableViewCell  - gt  Void    Add an action when the button is pressed that only executes the closure  You did it programmatically with cell yes targetForAction  connected   withSender  self  but I would prefer an  IBAction outlet  -    IBAction func buttonTap sender  AnyObject       tapAction  self     Now pass the content of func connected sender  UIButton           as a closure to cell tapAction     lt closure content here    gt    Please refer to the article for a more precise explanation and please don t forget to break reference cycles when capturing variables from the environment

User · Answer

The accepted answer is good and simple approach but have limitation of information it can hold with tag  As sometime more information needed   You can create a custom button and add properties as many as you like they will hold info you wanna pass   class CustomButton  UIButton       var orderNo   -1     var clientCreatedDate   Date timeIntervalSince1970  1      Make button of this type in Storyboard or programmatically    protocol OrderStatusDelegate  class       func orderStatusUpdated orderNo  Int  createdDate  Date     class OrdersCell  UITableViewCell        IBOutlet weak var btnBottom  CustomButton      weak var delegate  OrderStatusDelegate      While configuring the cell add values to these properties    func configureCell order  OrderRealm  index  Int         btnBottom orderNo   Int order orderNo       btnBottom clientCreatedDate   order clientCreatedDate      When tapped access those properties in button s action  within cell s subclass  that can be sent through delegate    IBAction func btnBumpTapped   sender  Any        if let button   sender as  CustomButton           let orderNo   button orderNo         let createdDate   button clientCreatedDate         delegate  orderStatusUpdated orderNo  orderNo  createdDate  createdDate

User · Answer

With Swift 5 this is what  worked for me    Step 1  Created IBOutlet for UIButton in My CustomCell swift  class ListProductCell  UITableViewCell    IBOutlet weak var productMapButton  UIButton    todo     Step 2  Added action method in CellForRowAtIndex method and provided method implementation in the same view controller  func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell           let cell   tableView dequeueReusableCell withIdentifier   ListProductCell   as  ListProductCell cell productMapButton addTarget self  action   selector ListViewController onClickedMapButton       for   touchUpInside  return cell         objc func onClickedMapButton   sender  Any              print  Tapped

User · Answer

Swift 4  amp  Swift 5   You need to add target for that button   myButton addTarget self  action   selector connected sender     for   touchUpInside    And of course you need to set tag of that button since you are using it   myButton tag   indexPath row   You can achieve this by subclassing UITableViewCell  Use it in interface builder  drop a button on that cell  connect it via outlet and there you go   To get the tag in the connected function    objc func connected sender  UIButton       let buttonTag   sender tag

[ios] UIButton action in table view cell

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