How to ignore the sender parameter UIButton - ios

Question

I was using a function as an #IBAction but now I want to use it as a normal function. But the problem is when I try to call the function it is asking me for the sender and is expecting a UIButton as a parameter.
How can I remove that sender so it doesn't affect my function?
Here is my function:
func addProductToCartButton(_ sender: UIButton) {
// Start animation region
let buttonPosition : CGPoint = sender.convert(sender.bounds.origin, to: self.productsTableView)
let indexPath = self.productsTableView.indexPathForRow(at: buttonPosition)!
let cell = productsTableView.cellForRow(at: indexPath) as! ProductTableViewCell
let imageViewPosition : CGPoint = cell.productImageView.convert(cell.productImageView.bounds.origin, to: self.view)
let imgViewTemp = UIImageView(frame: CGRect(x: imageViewPosition.x, y: imageViewPosition.y, width: cell.productImageView.frame.size.width, height: cell.productImageView.frame.size.height))
imgViewTemp.image = cell.productImageView.image
animationProduct(tempView: imgViewTemp)
// End animation region
}
Here is where I need to call the function:
func didTapAddToCart(_ cell: ProductTableViewCell) {
let indexPath = self.productsTableView.indexPath(for: cell)
addProductToCartButton( expecting UIBUTTON parameter)
}
I was trying to set the sender as nil but is not working. Do you have any idea?

Answer 1

Approach 1 (Recommended):
You can make that argument as optional:
#IBAction func addProductToCartButton(_ sender: UIButton?)
{
// Do your stuff here
}
Now you can call it like:
addProductToCartButton(nil)
Approach 2 (Not Recommended)
If you don't want to make the argument as optional, you can call it like:
addProductToCartButton(UIButton()) // It's not recommended
Approach 3 (Recommended)
Just write another utility function and add the code in it (Add the code written inside the IBAction to this function). Instead of calling IBAction from another function, call this utility function.

Answer 2

You need to refactor your code. The current implementation of addProductToCartButton uses the sender (the button) to determine an index path. And then the rest of the code is based on that index path.
You then have your didTapAddToCart method which attempts to call addProductToCartButton but you don't have the button at this point but it does have an index path.
I would create a new function that takes an index path as its parameter. Its implementation is most of the existing code in addProductToCartButton.
Here's the new function (which is mostly the original addProductToCartButton code):
func addProduct(at indexPath: IndexPath) {
let cell = productsTableView.cellForRow(at: indexPath) as! ProductTableViewCell
let imageViewPosition : CGPoint = cell.productImageView.convert(cell.productImageView.bounds.origin, to: self.view)
let imgViewTemp = UIImageView(frame: CGRect(x: imageViewPosition.x, y: imageViewPosition.y, width: cell.productImageView.frame.size.width, height: cell.productImageView.frame.size.height))
imgViewTemp.image = cell.productImageView.image
animationProduct(tempView: imgViewTemp)
// End animation region
}
Then redo addProductToCartButton as:
func addProductToCartButton(_ sender: UIButton) {
// Start animation region
let buttonPosition : CGPoint = sender.convert(sender.bounds.origin, to: self.productsTableView)
let indexPath = self.productsTableView.indexPathForRow(at: buttonPosition)!
addProduct(at: indexPath)
}
And finally, update didTapAddToCart:
func didTapAddToCart(_ cell: ProductTableViewCell) {
let indexPath = self.productsTableView.indexPath(for: cell)
addProduct(at: indexPath)
}

Answer 3

Extending Midhun MPs answer you can make your function call even simpler by providing a default value of nil:
#IBAction func addProductToCartButton(_ sender: UIButton? = nil) {
// Do your stuff here
}
Then you can call the function like this:
addProductToCartButton()

Answer 4

Well simplest approach for this type of logic is, pass nil value as parameter, it would be like this,
addProductToCartButton(nil)
Just make sure that you are not using any button property in your function. But if you are using button property then just simple add a check in your function like this,
func addProductToCartButton(_ sender: UIButton) {
if sender != nil {
//Do Something
}
}
Hope this will solve your issue, Thanks for reading this.