How to add text input in alertview of ios 8?

Question

I want to add text input in alert-view of ios 8. I know it was done using UIAlertController but not have any idea. How to do it ?

Answer 1

Here's handy method with submit/cancel and completion handler for text if inputted:

/**
 Presents an alert controller with a single text field for user input

 - parameters:
    - title: Alert title
    - message: Alert message
    - placeholder: Placeholder for textfield
    - completion: Returned user input
 */

func showSubmitTextFieldAlert(title: String,
                              message: String,
                              placeholder: String,
                              completion: @escaping (_ userInput: String?) -> Void) {

    let alertController = UIAlertController(title: title,
                                            message: message,
                                            preferredStyle: .alert)

    alertController.addTextField { (textField) in
        textField.placeholder = placeholder
        textField.clearButtonMode = .whileEditing
    }

    let submitAction = UIAlertAction(title: "Submit", style: .default) { (action) in
        let userInput = alertController.textFields?.first?.text
        completion(userInput)
    }

    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { (_) in
        completion(nil)
    }

    alertController.addAction(submitAction)
    alertController.addAction(cancelAction)

    present(alertController, animated: true)
}