Display UIAlertController from common Class in Swift

Kunal Prasad

26 October 2021

UIAlertController

Some time we need to use UIAlertcontroller to display some message , for that we need to define in each class where we want to use but we can make a common class from where we can access from any controller and display.

Follow some steps to do that.

1: create a class like GlobalData.swift and its parent would be NSObject

2: write the function:

    func getLocationWindow(view:UIViewController){
        
    let AC = UIAlertController(title: "Enter Your Location", message: "Select Location", preferredStyle: .alert)
        
    AC.addTextField { (textField) in
            textField.placeholder = "Enter Location";
            //textField.addTarget(self, action: #selector(self.myTarget), for: UIControlEvents.allEvents)
            textField.delegate = self;
            textField.tag = 999
            textField.isUserInteractionEnabled = true

    }
        
    let addBtn = UIAlertAction(title: "ADD LOCATION", style:.default, handler: {(_ action: UIAlertAction) -> Void in
    
        
    let okBtn = UIAlertAction(title: "GO TO LOCATION", style: .default, handler: {(_ action: UIAlertAction) -> Void in
    })
    let noBtn = UIAlertAction(title: "CANCEL", style:.destructive, handler: {(_ action: UIAlertAction) -> Void in
    })
    AC.addAction(addBtn)
    AC.addAction(okBtn)
    AC.addAction(noBtn)
        
    view.parent!.present(AC, animated: true, completion: { _ in })
    }

func getLocationWindow(view:UIViewController){

let AC = UIAlertController(title: "Enter Your Location", message: "Select Location", preferredStyle: .alert)

AC.addTextField { (textField) in

textField.placeholder = "Enter Location";

//textField.addTarget(self, action: #selector(self.myTarget), for: UIControlEvents.allEvents)

textField.delegate = self;

textField.tag = 999

textField.isUserInteractionEnabled = true

}

let addBtn = UIAlertAction(title: "ADD LOCATION", style:.default, handler: {(_ action: UIAlertAction) -> Void in

let okBtn = UIAlertAction(title: "GO TO LOCATION", style: .default, handler: {(_ action: UIAlertAction) -> Void in

})

let noBtn = UIAlertAction(title: "CANCEL", style:.destructive, handler: {(_ action: UIAlertAction) -> Void in

})

AC.addAction(addBtn)

AC.addAction(okBtn)

AC.addAction(noBtn)

view.parent!.present(AC, animated: true, completion: { _ in })

}

3: Now from any class whose parent is UIViewController

call like as:

globalObjectHome.getLocationWindow(view:self)

Note: globalObjectHome is object of GlobalData.swift class.