Swift에서 UIAlertController에 TextField를 추가하는 방법

Swift에서 UIAlertController에 TextField를 추가하는 방법

---

나는 보여주기 위해 노력하고 UIAlertControllerA를을 UITextView. 줄을 추가 할 때 :

    //Add text field
    alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
    }        

내가 얻을 Runtime오류 :

치명적 오류 : 선택적 값을 언 래핑하는 동안 예기치 않게 nil이 발견되었습니다.

    let alertController: UIAlertController = UIAlertController(title: "Find image", message: "Search for image", preferredStyle: .Alert)

    //cancel button
    let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .Cancel) { action -> Void in
        //cancel code
    }
    alertController.addAction(cancelAction)

    //Create an optional action
    let nextAction: UIAlertAction = UIAlertAction(title: "Search", style: .Default) { action -> Void in
        let text = (alertController.textFields?.first as! UITextField).text
        println("You entered \(text)")
    }
    alertController.addAction(nextAction)

    //Add text field
    alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
        textField.textColor = UIColor.greenColor()
    }
    //Present the AlertController
    presentViewController(alertController, animated: true, completion: nil)

이것은 나의 내부에 제시 ViewController를 통해 IBAction.

여기 에서 코드를 다운로드했으며 정상적으로 작동합니다. 이 메서드를 복사하여 내 코드에 붙여 넣었 더니 깨졌습니다. 의 존재 자체 마지막 줄에 아무 영향을주지 않습니다.

---

스위프트 4

alert.addTextField(configurationHandler: { (textField) in
    textField.placeholder = "Enter First Name"
})

---

이 코드를 사용하면 내 앱에서이 코드를 성공적으로 실행하고 있습니다.

@IBAction func addButtonClicked(sender : AnyObject){
    let alertController = UIAlertController(title: "Add New Name", message: "", preferredStyle: UIAlertControllerStyle.Alert)
    alertController.addTextFieldWithConfigurationHandler { (textField : UITextField!) -> Void in
        textField.placeholder = "Enter Second Name"
    }
    let saveAction = UIAlertAction(title: "Save", style: UIAlertActionStyle.Default, handler: { alert -> Void in
        let firstTextField = alertController.textFields![0] as UITextField
        let secondTextField = alertController.textFields![1] as UITextField
    })
    let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: {
        (action : UIAlertAction!) -> Void in })
    alertController.addTextFieldWithConfigurationHandler { (textField : UITextField!) -> Void in
        textField.placeholder = "Enter First Name"
    }

    alertController.addAction(saveAction)
    alertController.addAction(cancelAction)

    self.presentViewController(alertController, animated: true, completion: nil)
}

편집 됨 : Swift 3.0 버전

@IBAction func addButtonClicked(_ sender: UIButton){
    let alertController = UIAlertController(title: "Add New Name", message: "", preferredStyle: .alert)
    alertController.addTextField { (textField : UITextField!) -> Void in
        textField.placeholder = "Enter Second Name"
    }
    let saveAction = UIAlertAction(title: "Save", style: .default, handler: { alert -> Void in
        let firstTextField = alertController.textFields![0] as UITextField
        let secondTextField = alertController.textFields![1] as UITextField
        print("firstName \(firstTextField.text), secondName \(secondTextField.text)")
    })
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: { (action : UIAlertAction!) -> Void in })
    alertController.addTextField { (textField : UITextField!) -> Void in
        textField.placeholder = "Enter First Name"
    }

    alertController.addAction(saveAction)
    alertController.addAction(cancelAction)

    self.present(alertController, animated: true, completion: nil)
}

---

Swift 3.0에서 텍스트 필드를 추가하려면 :

let alertController = UIAlertController(title: "Title", message: "", preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "Save", style: .default, handler: { alert -> Void in
    let textField = alertController.textFields![0] as UITextField
    // do something with textField
}))
alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
alertController.addTextField(configurationHandler: {(textField : UITextField!) -> Void in
    textField.placeholder = "Search"
})   
self.present(alertController, animated: true, completion: nil)

---

그래서 저는 제 코드에서 작업 코드와 무엇이 다를 수 있는지 확인하기 시작했습니다. 내 ViewController가 확장된다는 것을 알았습니다.

UITextFieldDelegate

이는 자식 UITextView의 대리자를 설정해야 함을 의미합니다.

alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
        searchTextField = textField
        searchTextField?.delegate = self //REQUIRED
        searchTextField?.placeholder = "Enter your search terms"
}

---

AlertView에 textField를 추가하는 방법은 무엇입니까? 짧고 간단하게합시다.

이것은 Swift 3.0 이상에서 작동합니다.

var nameField: UITextField?
let alertController = UIAlertController(title: "Add Number", message: nil, preferredStyle: .alert)
// Add textfield to alert view
alertController.addTextField { (textField) in
    nameField = textField
}

먼저의 개체를 인스턴스화 한 UIAlertController다음 클래스 addTextField구성원 에 액세스하여 텍스트 필드를 추가합니다 UIAlertController.

---

해결책:

스위프트 4.2

다음 줄을 시도하고 작동하는지 확인하십시오.

let alertController = UIAlertController(title: "Add New Name", message: "", preferredStyle: .alert)

alertController.addTextField { (textField : UITextField!) -> Void in
    textField.placeholder = "Enter Second Name"
}
let saveAction = UIAlertAction(title: "Save", style: .default, handler: { alert -> Void in
let firstTextField = alertController.textFields![0] as UITextField
let secondTextField = alertController.textFields![1] as UITextField
    })
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: {
(action : UIAlertAction!) -> Void in })
alertController.addTextField { (textField : UITextField!) -> Void in
    textField.placeholder = "Enter First Name"
}

alertController.addAction(saveAction)
alertController.addAction(cancelAction)

self.present(alertController, animated: true, completion: nil)

도움이되기를 바랍니다.

---

Swift 4.2 및 Xcode 10.1에서

와 경고 두 개의 텍스트 필드 와 읽기 텍스트 필드 텍스트 데이터 및 모든 뷰의 상단에있는 경고 .

func alertWithTF(title: String, message: String) {
    //Step : 1
    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)

    //Step : 2
    alert.addAction (UIAlertAction(title: "Save", style: .default) { (alertAction) in
        let textField = alert.textFields![0]
        let textField2 = alert.textFields![1]
        if textField.text != "" {
            //Read textfield data
            print(textField.text!)
            print("TF 1 : \(textField.text!)")
        } else {
            print("TF 1 is Empty...")
        }
        if textField2.text != "" {
            //Read textfield data
            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
    }

    //Cancel action
    alert.addAction(UIAlertAction(title: "Cancel", style: .default) { (alertAction) in })
   self.present(alert, animated:true, completion: nil)

}

모든 뷰 위에 aleert를 표시하려는 경우.

위의 코드에서이 마지막 줄을 제거 self.present(alert, animated:true, completion: nil)하고 아래 코드를 추가하십시오.

//Present alert on top of all views.
let alertWindow = UIWindow(frame: UIScreen.main.bounds)
alertWindow.rootViewController = UIViewController()
alertWindow.windowLevel = UIWindowLevelAlert + 1

alertWindow.makeKeyAndVisible()

alertWindow.rootViewController?.present(alert, animated:true, completion: nil)

이제 이렇게 불러

alertWithTF(title: "This is title", message: "This is message")

---

Swift 4.0의 경우 프로젝트에서 성공적으로 테스트 된이 코드 샘플을 사용할 수 있습니다.

@IBAction func withdrawTapped(_ sender: UIButton) {

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

  let withdrawAction = UIAlertAction(title: "Withdraw", style: .default) { (aciton) in

    let text = alertController.textFields!.first!.text!

    if !text.isEmpty {
      self.presentAlert(
        title: "Succesful", 
        message: "You made request for withdraw \(textField.text) tokens")
    }
  }

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

  alertController.addTextField { (textField) in
    textField.placeholder = "999"
    textField.keyboardType = .decimalPad
  }

  alertController.addAction(withdrawAction)
  alertController.addAction(cancelAction)

  self.present(alertController, animated: true, completion: nil)
}

---

To add alertController with one textField (Swift 5)

func openAlert(){
    let alertController = UIAlertController(title: "Title", message: "", preferredStyle: .alert)
    alertController.addTextField { (textField : UITextField!) -> Void in
        textField.placeholder = "Enter name"
    }

    let saveAction = UIAlertAction(title: kAlertConfirm, style: .default, handler: { alert -> Void in
        if let textField = alertController.textFields?[0] {
            if textField.text!.count > 0 {
                print("Text :: \(textField.text ?? "")")
            }
        }
    })

    let cancelAction = UIAlertAction(title: kAlertCancel, style: .default, handler: {
        (action : UIAlertAction!) -> Void in })

    alertController.addAction(cancelAction)
    alertController.addAction(saveAction)

    alertController.preferredAction = saveAction

    self.present(alertController, animated: true, completion: nil)
}

---

Great answer a slight modification to show how the textfield can be used:

func addRow (row: Int, bodin: String, flag: Int) {
    let alertController = UIAlertController(title: bodin, message: "", preferredStyle: .alert)
    alertController.addAction(UIAlertAction(title: "Save", style: .default, handler: {
        alert -> Void in
        _ = alertController.textFields![0] as UITextField

    }))
    alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

    alertController.addTextField(configurationHandler: {(textField : UITextField!) -> Void in
        switch flag {
        case 0:
            textField.keyboardType = UIKeyboardType.phonePad
            textField.placeholder = "Enter Number"
        case 1:
            textField.keyboardType = UIKeyboardType.emailAddress
            textField.placeholder = "Enter Email"
        default:
            break
        }

    })

---

add TextField to UIAlertController and TextField text Display on UILabel in Swift

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

alert.addTextField { (textField) in
textField.placeholder = "First Name"
}
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in
let textField = alert?.textFields![0]
self.label.text = textField?.text  }))

self.present(alert, animated: true, completion: nil)

---

First class conforms to the UITextFieldDelegate , then create new textField property

    private var myTextField : UITextField?

    // now where u want to add code
    let alertContoller = UIAlertController.init(title: "Add", message: "My message to user", preferredStyle: .alert)
    alertContoller.addTextField { (textField) in
        // make sure your outside any property should be accessed with self here
        self.myTextField = textField
        //Important step assign textfield delegate to self
        self.myTextField?.delegate = self 
        self.myTextField?.placeholder = self.textFieldPlaceholderText
    }
    let action = UIAlertAction.init(title: "Ok", style: .default) { action in
        print("Alert tapped")
    }
    alertContoller.addAction(action)
    present(alertContoller, animated: true, completion:nil)

Thanks

참고URL : https://stackoverflow.com/questions/31922349/how-to-add-textfield-to-uialertcontroller-in-swift