Swift creating a function that runs another function that was implemented while called.(Not that complex) - swift

Question

Hello i am trying to create a kickass function to show alerts and run it's function. Buuut unfortunately Xcode and i am getting confused in here:
buttonAction:Array<(Any) -> Any)>
Expected '>' to complete generic argument list
func callAlert(_ view: UIViewController, title:String, message:String, buttonName:Array<String>, buttonAction:Array<(Any) -> Any)>) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
for index in 0..<buttonName.count{
alert.addAction(UIAlertAction(title: buttonName[index], style: .default, handler: { action in
switch action.style{
case .default:
print("default")
buttonAction()
case .cancel:
print("cancel")
case .destructive:
print("destructive")
}}))}
view.present(alert, animated: true, completion: nil)
}
How do i call function? Please check below:
callAlert(self,
title: "Donate type",
message: "Thanks for your support!",
buttonName: ["Buy me a coffee!","Something"]
)

Answer 1

First of all I highly recommend to implement the method as an extension of UIViewController.
Second of all I'd prefer presentAlert() over callAlert()
Third of all rather than two arrays for buttons and actions use one array of tuples for title, style and action.
By the way unspecified type (Any) -> Any is very, very bad because UIAlertAction handlers are clearly ((UIAlertAction) -> Void)?
Finally add an optional completion handler
extension UIViewController {
func presentAlert(title: String,
message: String,
alertActions: [(title: String, style: UIAlertAction.Style, action: ((UIAlertAction) -> Void)?)],
completion: (() -> Void)? = nil) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
for action in alertActions {
alert.addAction(UIAlertAction(title: action.title, style: action.style, handler: action.action))
}
self.present(alert, animated: true, completion: completion)
}
}
And use it inside an UIViewController
let buyCoffeeAction : (UIAlertAction) -> Void = { action in
// do something
}
let somethingAction : (UIAlertAction) -> Void = { action in
// do something
}
presentAlert(title: "Donate type",
message: "Thanks for your support!",
alertActions: [(title: "Buy me a coffee!", style: .default, action: buyCoffeeAction),
(title: "Something", style: .destructive, action: somethingAction)],
completion: nil)