So I've been searching StackExchange on how to put a UIButton inside of a UITableViewCell and thought I found the answer, but keep getting an "unrecognized selector sent to instance" error.
Here's where I call the function
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tblTeams.dequeueReusableCell(withIdentifier: "cellReuse")! as! TeamsTableViewCell
cell.btnLeave.tag = indexPath.row
cell.btnLeave.addTarget(self, action: "LeaveTeam:", for: UIControlEvents.touchUpInside)
return cell
}
and here's where the function is. It's within the same class, and even extension, as the prior code block
#IBAction func LeaveTeam(sender: UIButton){
}
I've tried rewording the quote, I've tried using #selector... just please tell me how I do it right. Thanks!
Replace
cell.btnLeave.addTarget(self, action: #selector(leaveTeam(_:)) for: UIControlEvents.touchUpInside)
#objc func leaveTeam(_ sender: UIButton) {---}
start method name in lower case
addTarget(self, action:#selector(leaveTeam(sender:)), for: .touchUpInside)
#objc func leaveTeam(sender : UIButton) -> Void {
}
Related
I have a collection view and image view inside it and I added a UIButton to delete the image after selection. When I click the button it crashes and gives me this error:
AdPostViewController deleteUser]: unrecognized selector sent to instance 0x7fb588d5b7f0
Why is this happening and how do I fix this? Here is my code:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageCell", for: indexPath) as! ImageCell
let img = self.PhotoArray[indexPath.row]
cell.image.image = img
cell.deleteButton?.layer.setValue(indexPath.row, forKey: "index")
cell.deleteButton?.addTarget(self, action: Selector(("deleteUser")), for: UIControl.Event.touchUpInside)
return cell
}
func deleteUser(_ sender: UIButton) {
let i: Int = (sender.layer.value(forKey: "index")) as! Int
PhotoArray.remove(at: i)
// PhotoArray.removeAtIndex(i)
ImagesCollectionView.reloadData()
}
One problem is that you are forcing manual formation of the Objective-C selector, and you don't actually know how to form an Objective-C selector manually so you are getting it wrong. Don't do that! Let the compiler form the selector for you. That's its job. Replace
action: Selector(("deleteUser"))
with
action: #selector(deleteUser)
Also, you need to expose your deleteUser method to Objective-C explicitly:
#objc func deleteUser(_ sender: UIButton) {
Otherwise Objective-C still won't be able to introspect your class and find this method when the time comes to call it. Fortunately, when you switch to #selector syntax, the compiler will call out that issue for you!
I made a custom tableview cell with a nib file in my project with a button. How do I make it so that when the button is clicked, I can execute a simple task, like printing hi? I saw other posts that are similar, but don't completely understand them.
Thanks in Advance....
You should add target to your button like this :
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identifier = "ShipmentDeliveryFactorTableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: identifier, for: indexPath) as! ShipmentDeliveryFactorTableViewCell
let object = factorArray[indexPath.row]
cell.detailButton1.addTarget(self, action: #selector(showDetail(_:)), for: .touchUpInside)
cell.detailButton1.tag = indexPath.row
return cell
}
#objc func showDetail(_ sender: UIButton) {
let selectedCell = factorArray[sender.tag]
print("selectedCell.id")
}
This is driving me nuts, I've been reading SO for hours and tried everything and cant get this button selector to work. This shouldn't be difficult.
Inside CellForItemAt i have set the button tag and try call the button.
cell.deleteCellButton.tag = indexPath.item
cell.deleteCellButton.addTarget(self, action: #selector(deleteCellButtonTapped(sender:)), for: UIControlEvents.touchUpInside)
I've tried (_:), "deleteCellButtonTapped:", and any other number of parenthesis combinations and i still get unrecognised selector. i don't know why autocomplete recommends (sender:) I've never seen this before.
then my button function:
func deleteCellButtonTapped(sender: UIButton!) {
self.packArray.remove(at: sender.tag)
print(packArray.count)
self.outerCollectionView.deleteItems(at: [IndexPath(item: sender.tag, section: 0)])
self.outerCollectionView.reloadData()
self.outerCollectionView.layoutIfNeeded()
}
Assuming you're using Swift 3, and func deleteCellButtonTapped(sender: UIButton!) is in the same class:
addTarget(self, action: #selector(deleteCellButtonTapped(sender:)), for: .touchUpInside)
works fine.
Refering the selector method from it's class works for me.
What you can do is access selector method prefixing by it's class name.
I assume your class name is MyClassViewController. And you code will look like:
class MyClassViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
.... // Other implementation methods
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
....// create cell object and dequeue
cell.deleteCellButton.addTarget(self, action: #selector(MyClassViewController.deleteCellButtonTapped(_:)), for: .touchUpInside)
return cell
}
func deleteCellButtonTapped(_ sender: Any) {
// your method implementation
print("Selector method called")
}
}
Hope this works fine
Hello I'm trying to figure out how to call a UIButton inside a custom cell within a UItable in storyboard. At the moment I have a library that creates a sidemenu working just fine (more info here) and I can see the button I placed when I launch the simulator. However, when I click on the button the action is not triggered, can you please guide me as to how I can achieve this?
Important to note that the table was create entirely in storyboard.
My work in progress code within TopratedVC.swift to get the button to trigger the action:
override func viewDidLoad() {
super.viewDidLoad()
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("UITableViewVibrantCell") as! CellClassMenu
cell.sendFeedBackBtn.tag = indexPath.row
cell.sendFeedBackBtn.addTarget(self, action: "sendFeedBackBtnAction:", forControlEvents: .TouchUpInside)
cell.contentView.userInteractionEnabled = false //tried with true as well, no difference
cell.bringSubviewToFront(cell.sendFeedBackBtn)
cell.userInteractionEnabled = true
return cell
}
func sendFeedBackBtnAction(sender: UIButton){
print("sendFeedBackBtnAction tapped")
}
My UITableViewVibrantCell.swift file contains the following:
import UIKit
class UITableViewVibrantCell: UITableViewCell {
#IBOutlet var sendFeedBackBtn: UIButton!
}
My sndFeedBackBtn has a referencing outlet to UITableViewVibrantCellsendFeedBackBtn which has a class of UITableViewVibrantCell. What am I doing wrong? Thank you.
What it looks like in simulator:
In your post, you show a UITableViewVibrantCell class, and dequeue a cell with the "UITableViewVibrantCell" identifier, but cast it as CellClassMenu?
Anyhow, it would be better practice to create a cell delegate for actions, and let your controller decide the implementation, rather than adding a target every time the cell is dequeued. You can do that like so:
UITableViewVibrantCell
import UIKit
protocol UITableViewVibrantCellDelegate: NSObjectProtocol {
func buttonPressed(sender: UIButton)
}
class UITableViewVibrantCell: UITableViewCell {
var delegate: UITableViewVibrantCellDelegate?
#IBOutlet var feedbackButton: UIButton!
override func awakeFromNib() {
super.awakeFromNib()
feedBackButton.addTarget(self, action: #selector(self.buttonPressed(_:)), forControlEvents: .TouchUpInside)
}
func buttonPressed(sender: UIButton) {
delegate?.buttonPressed(sender)
}
}
TopratedVC
class TopratedVC: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("UITableViewVibrantCell") as! UITableViewVibrantCell
cell.delegate = self
return cell
}
// MARK: - UITableViewVibrantCellDelegate
func buttonPressed(sender: UIButton) {
print("feedbackButton tapped")
}
}
Selectors ("sendFeedBackBtnAction:") can't pass parameters. And a param isn't needed in the sendFeedBackBtnAction function since you're calling it only for this button. So change I'd change it to simply...
func sendFeedBackBtnAction()
then I'd also recommend changing your selector to a more updated swift version...
cell.sendFeedBackBtn.addTarget(self, action: #selector(sendFeedBackBtnAction), forControlEvents: .TouchUpInside)
I've got a UITableViewCell that contains a button, I handle this button click event follow this link Get button click inside UI table view cell,
Here is my code:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
cell.directCommentButton.tag = indexPath.row;
cell.directCommentButton.addTarget(self, action: "directCommentButtonClicked", forControlEvents: UIControlEvents.TouchUpInside)
return cell
}
func directCommentButtonClicked(sender: AnyObject) {
// directComment = 1
println("DIRECT COMMENT")
}
but there is an error directCommentButtonClicked]: unrecognized selector sent to instance 0x7f9e50590f10' and app has crashed. When I remove the sender: AnyObject, the error disappear, but I want to get the sender, how can I do that. Tks in advance
Just pass your action selector this way:
cell.directCommentButton.addTarget(self, action: "directCommentButtonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
you have to add : because your function accepts an argument.