Get input value from TextField in iOS alert in Swift

Updated for Swift 3 and above:

//1. Create the alert controller.let alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .alert)//2. Add the text field. You can configure it however you need.alert.addTextField { (textField) in    textField.text = "Some default text"}// 3. Grab the value from the text field, and print it when the user clicks OK.alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in    let textField = alert.textFields![0] // Force unwrapping because we know it exists.    print("Text field: \(textField.text)")}))// 4. Present the alert.self.present(alert, animated: true, completion: nil)

Swift 2.x

Assuming you want an action alert on iOS:

//1. Create the alert controller.            var alert = UIAlertController(title: "Some Title", message: "Enter a text", preferredStyle: .Alert)//2. Add the text field. You can configure it however you need.alert.addTextFieldWithConfigurationHandler({ (textField) -> Void in    textField.text = "Some default text."})//3. Grab the value from the text field, and print it when the user clicks OK. alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { [weak alert] (action) -> Void in    let textField = alert.textFields![0] as UITextField    println("Text field: \(textField.text)")}))// 4. Present the alert.self.presentViewController(alert, animated: true, completion: nil)

Swift 5

You can use the below extension for your convenience.

Usage inside a ViewController:

showInputDialog(title: "Add number",                subtitle: "Please enter the new number below.",                actionTitle: "Add",                cancelTitle: "Cancel",                inputPlaceholder: "New number",                inputKeyboardType: .numberPad, actionHandler:                        { (input:String?) in                            print("The new number is \(input ?? "")")                        })

The extension code:

extension UIViewController {    func showInputDialog(title:String? = nil,                         subtitle:String? = nil,                         actionTitle:String? = "Add",                         cancelTitle:String? = "Cancel",                         inputPlaceholder:String? = nil,                         inputKeyboardType:UIKeyboardType = UIKeyboardType.default,                         cancelHandler: ((UIAlertAction) -> Swift.Void)? = nil,                         actionHandler: ((_ text: String?) -> Void)? = nil) {                let alert = UIAlertController(title: title, message: subtitle, preferredStyle: .alert)        alert.addTextField { (textField:UITextField) in            textField.placeholder = inputPlaceholder            textField.keyboardType = inputKeyboardType        }        alert.addAction(UIAlertAction(title: actionTitle, style: .default, handler: { (action:UIAlertAction) in            guard let textField =  alert.textFields?.first else {                actionHandler?(nil)                return            }            actionHandler?(textField.text)        }))        alert.addAction(UIAlertAction(title: cancelTitle, style: .cancel, handler: cancelHandler))                self.present(alert, animated: true, completion: nil)    }}

In Swift5 ans Xcode 10

Add two textfields with Save and Cancel actions and read TextFields text data

func alertWithTF() {    //Step : 1    let alert = UIAlertController(title: "Great Title", message: "Please input something", preferredStyle: UIAlertController.Style.alert )    //Step : 2    let save = UIAlertAction(title: "Save", style: .default) { (alertAction) in        let textField = alert.textFields![0] as UITextField        let textField2 = alert.textFields![1] as UITextField        if textField.text != "" {            //Read TextFields text data            print(textField.text!)            print("TF 1 : \(textField.text!)")        } else {            print("TF 1 is Empty...")        }        if textField2.text != "" {            print(textField2.text!)            print("TF 2 : \(textField2.text!)")        } else {            print("TF 2 is Empty...")        }    }    //Step : 3    //For first TF    alert.addTextField { (textField) in        textField.placeholder = "Enter your first name"        textField.textColor = .red    }    //For second TF    alert.addTextField { (textField) in        textField.placeholder = "Enter your last name"        textField.textColor = .blue    }    //Step : 4    alert.addAction(save)    //Cancel action    let cancel = UIAlertAction(title: "Cancel", style: .default) { (alertAction) in }    alert.addAction(cancel)    //OR single line action    //alert.addAction(UIAlertAction(title: "Cancel", style: .default) { (alertAction) in })    self.present(alert, animated:true, completion: nil)}

For more explanation https://medium.com/@chan.henryk/alert-controller-with-text-field-in-swift-3-bda7ac06026c