입력으로 경고 메시지를 만든 다음 입력에서 값을 가져 오려고합니다. 입력 텍스트 필드를 만드는 방법에 대한 좋은 자습서를 많이 찾았습니다. 하지만 경고에서 값을 얻을 수 없습니다.
답변
Swift 3 이상 업데이트 :
//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 가정합니다.
//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)
답변
스위프트 3/4
편의를 위해 아래 확장을 사용할 수 있습니다.
내부 사용법 ViewController
:
showInputDialog(title: "Add number",
subtitle: "Please enter the new number below.",
actionTitle: "Add",
cancelTitle: "Cancel",
inputPlaceholder: "New number",
inputKeyboardType: .numberPad)
{ (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)
}
}
답변
에서 Swift5 엑스 코드 (10) ans와
저장 및 취소 작업으로 두 개의 텍스트 필드를 추가하고 TextFields 텍스트 데이터를 읽습니다.
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 설명은 https://medium.com/@chan.henryk/alert-controller-with-text-field-in-swift-3-bda7ac06026c