I am new in swift. I have made generic actionsheet

import Foundation
extension UIAlertController{
    func action(mes:String,tit:String,tit2:String,operation1:(),operation2:()) {
        
        let actionSheet = UIAlertController(title: "", message:mes, preferredStyle: .actionSheet)
        
        let EButton = UIAlertAction(title:tit ,
                                              style: .default,
                                              handler: { _ in
                                                operation1
 
                                                })
        
        let AllEButton = UIAlertAction(title:tit2,
                                                  style: .default ,
                                                  handler:{ _ in
                                                    operation2
                                
                                                    })
        
        let cancelAction = UIAlertAction(title: "Cancel",
                                         style: .cancel,
                                         handler: nil)

        
        [EButton, AllEButton, cancelAction].forEach { $0.setValue(UIColor.red, forKey: "titleTextColor")
        }
        
        
        actionSheet.addAction(EButton)
        actionSheet.addAction(AllEButton)
        actionSheet.addAction(cancelAction)
        
        present(actionSheet, animated: true, completion: nil)
    }
}

I want to want to call this extension from viewControllerA

let actionView = UIAlertController()

    class viewControllerA: UIViewController {}
   
 private extension viewControllerA {
    func alertBottomSheat()  {
    actionView.action(mes: "Update",tit: "Update only",tit2: "Update All", operation1:saveEvent(),operation2:saveEvent())
    }
 @IBAction func deleteEventButtonClicked(_ sender: Any) {
actionView.action(mes: "delete ",tit: "Delete only",tit2: "Delete All ",operation1:deleteEvent(),operation2:deleteEvent(deleteAll: true))

}
}

Q1- I this right way to call the extension from viewControllerA extension?

Q2- please tell me how to pass function in action function parameter using closure in this line?

actionView.action(mes: "delete ",tit: "Delete only",tit2: "Delete All ",operation1:deleteEvent(),operation2:deleteEvent(deleteAll: true))

and how to use closure in handler of action sheet in this line

let EButton = UIAlertAction(title:tit ,
                                          style: .default,
                                          handler: { _ in
                                            operation1

                                            })

CodePudding user response：

You first need to create an extension for UIViewController instead of UIAlertController

Also, set the correct closure argument for the function and then call the function like this.

extension UIViewController {
    
    func action(message: String, firstTitle: String, secondTitle: String, firstAction: (() -> Void)? = nil, secondAction: (() -> Void)? = nil) {
        
        let actionSheet = UIAlertController(title: "", message: message, preferredStyle: .actionSheet)
        
        let eButton = UIAlertAction(title: firstTitle ,
                                    style: .default,
                                    handler: {_ in firstAction?()})
        
        let allEButton = UIAlertAction(title: secondTitle,
                                       style: .default ,
                                       handler: {_ in secondAction?()})
        
        let cancelAction = UIAlertAction(title: "Cancel",
                                         style: .cancel,
                                         handler: nil)
        
        
        [eButton, allEButton, cancelAction].forEach { $0.setValue(UIColor.red, forKey: "titleTextColor")}
        
        
        actionSheet.addAction(eButton)
        actionSheet.addAction(allEButton)
        actionSheet.addAction(cancelAction)
        
        present(actionSheet, animated: true, completion: nil)
    }
}

Usage

private extension viewControllerA {
    func alertBottomSheat()  {
        self.action(message: "Update", firstTitle: "Update only", secondTitle: "Update All", firstAction: saveEvent, secondAction: saveEvent)
    }
    
    @IBAction func deleteEventButtonClicked(_ sender: Any) {
        self.action(message: "delete ", firstTitle: "Delete only", secondTitle: "Delete All ", firstAction: { self.deleteEvent()}, secondAction: { self.deleteEvent(deleteAll: true) })
        
    }
    
    func saveEvent() {
        
    }
    
    func deleteEvent(deleteAll: Bool = false) {
        
    }
}

Note: Fixed coding standard rule and var names.