UIAertController 텍스트 필드에서 입력 값을 가져오는 방법은 무엇입니까?

UIAertController 텍스트 필드에서 입력 값을 가져오는 방법은 무엇입니까?

메시지와 입력으로 경보 컨트롤러를 만들고 입력에서 값을 얻으려고 합니다.입력 텍스트 필드를 만드는 방법에 대한 많은 좋은 튜토리얼을 찾았지만 경고에서 값을 가져올 수 없습니다.

Swift 3 이상 버전에 대해 업데이트됨:

//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)

---

스위프트 2.x

iOS에서 작업 알림을 원한다고 가정할 때:

//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)

스위프트 5

당신은 당신의 편의를 위해 아래의 내선번호를 사용할 수 있습니다.

내부 사용ViewController:

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 ?? "")")
                        })

확장 코드:

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)
    }
}

Swift5 및 Xcode 10에서

저장 및 취소 작업을 사용하여 두 개의 텍스트 필드를 추가하고 텍스트 필드 텍스트 데이터 읽기

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)

}

자세한 내용은 https://medium.com/ @chan.skk/text-field-with-text-field-in-bda7ac06026c를 참조하십시오.

빠른 버전: 5.+

새 만들기TextField현재 범위의 변수 및 alertTextField에 할당alert.addTextField완료 핸들러.사용하다textField의 내면의 가치UIAlertAction완료 핸들러.

@IBAction func addButtonPressed(_ sender: UIBarButtonItem) {
          //Variable to store alertTextField
            var textField = UITextField()
            
            let alert = UIAlertController(title: "Add new item", message: "", preferredStyle: .alert)
            alert.addTextField { alertTextField in
                alertTextField.placeholder = "Create new item"
                
                //Copy alertTextField in local variable to use in current block of code
                textField = alertTextField
            }
            
            let action = UIAlertAction(title: "Add item", style: .default) { action in
                //Prints the alertTextField's value
                print(textField.text!)
            }
            
            alert.addAction(action)
            present(alert, animated: true, completion: nil)
        }

let ac = UIAlertController(title: "title", message: "message", preferredStyle: .alert)
ac.addTextField()

let submitAction = UIAlertAction(title: "Submit", style: .default) { [weak self, weak ac] action in
    guard let wordToget = ac?.textFields?[0].text else { return }
    //here you can do what you need like
    print(wordToget)
}

ac.addAction(submitAction)
present(ac, animated: true)

언급URL : https://stackoverflow.com/questions/26567413/how-to-get-input-value-from-a-uialertcontroller-text-field