Pass multiple parameters to addTarget

Question

In my UITableViewCell I have a button. And I want to add action to it by passing multiple parameters in cellForRowAtIndexPath method.

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("CartCell", forIndexPath:
        indexPath) as! CartTableViewCell
    cell.buyButton.addTarget(self, action: self.buyButton(indexPath, 2, 3 ,4 , 5, 6), forControlEvents: .TouchUpInside)
}

Answer 1

If you need to pass string just use accessibilityHint of UIButton.

Tag can only store Int so if anyone wants to pass string data can use this. However, this not a proper way of passing data!

example:

button.accessibilityHint = "your string data"
button.addTarget(self, action: Selector(("buttonTapped")), for: UIControlEvents.touchUpInside)

func buttonTapped (sender: UIButton) {
   let section = sender.accessibilityHint
}

Answer 2

I think we should architect the code well. The hacks will just make your code hard to understand and buggy. Here is some suggestion.

Make a custom button class

class CustomButton:UIButton {
var name:String = ""
var object:MyObjectClassType?

convenience init(name: String, object: MyObjectClassType) {
   self.init(frame:CGRectZero)
   self.name =name
   self.object = object!
}}

Now add target to your button

let btn = your custom button
btn.name = “Your name”
btn.object = any object
btn.addTarget(self, action: #selector(myMethod(_:)), forControlEvents:.TouchUpInside)

Now simply get your values in the method call

  @IBAction func myMethod(sender:CustomButton) {
    print(sender.name)
}

Answer 3

May be you can do something like this

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier("CartCell", forIndexPath:indexPath) as! CartTableViewCell
    cell.buyButton.tag = (indexPath.section*100)+indexPath.row
    cell.buyButton.addTarget(self, action: "btnBuy_Click:", forControlEvents: .TouchUpInside)
}

func btnBuy_Click(sender: UIButton) {
        //Perform actions here
     let section = sender.tag / 100
     let row = sender.tag % 100
     let indexPath = NSIndexPath(forRow: row, inSection: section)
     self.buyButton(indexPath, 2, 3 ,4 , 5, 6)
}

Create tag value according to you'r requirement and maintaint it's integrity too.

Answer 4

Easy!

1: Subclass UIButton:

class IndexPathCellButton: UIButton {
    var indexPath:NSIndexPath?
}

---

2: Set your value:

...
cell.indexPathButton.addTarget(self, action: #selector(LocationSearchViewController.cellOptionButtonClick(_:)), forControlEvents: .TouchUpInside)
cell.indexPathButton.indexPath = indexPath // Your value
...

---

3: Retrieve your value:

@objc private func cellOptionButtonClick(sender: IndexPathCellButton) {
    print(sender.indexPath)
}

Answer 5

You can use the tag property on the UIButtons's titleLabel and UIImageView to add additional parameters

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 
{
let cell = tableView.dequeueReusableCellWithIdentifier("CartCell", forIndexPath:indexPath) as! CartTableViewCell
cell.buyButton.tag = (indexPath.section*100)+indexPath.row
cell.buyButton.imageView.tag = 2
cell.buyButton.titleLabel.tag = 3
cell.buyButton.addTarget(self, action: "btnBuy_Click:", forControlEvents: .TouchUpInside)
}