Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

How to add textField in UIAlertController?

People also ask

How do I add padding to TextField?

A JTextField class will generate an ActionListener interface when we trying to enter some input inside it. The important methods of a JTextField class are setText(), getText(), setBorder(), setEnabled(), etc. We can add padding to a JTextField using the setMargin(Insets s) of JTextComponent class.

What is TextField in iOS?

A control that displays an editable text interface. iOS 13.0+ iPadOS 13.0+ macOS 10.15+ Mac Catalyst 13.0+ tvOS 13.0+ watchOS 6.0+


You will get all added textfields from alert controller by its textFields readonly property, you can use it to get its text. Like

Swift 4:

let alertController = UIAlertController(title: "", message: "", preferredStyle: .alert)
alertController.addTextField { textField in
    textField.placeholder = "Password"
    textField.isSecureTextEntry = true
}
let confirmAction = UIAlertAction(title: "OK", style: .default) { [weak alertController] _ in
    guard let alertController = alertController, let textField = alertController.textFields?.first else { return }
    print("Current password \(String(describing: textField.text))")
    //compare the current password and do action here
}
alertController.addAction(confirmAction)
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion: nil)

Note: textField.text is optional, unwrap it before using

Objective-C:

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
    textField.placeholder = @"Current password";
    textField.secureTextEntry = YES;
}];
UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
    NSLog(@"Current password %@", [[alertController textFields][0] text]);
    //compare the current password and do action here

}];
[alertController addAction:confirmAction];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
    NSLog(@"Canelled");
}];
[alertController addAction:cancelAction];
[self presentViewController:alertController animated:YES completion:nil];

By [[alertController textFields][0] text] this line, it will take first textfield added to the alerController and get its text.


You can add multiple textfields to alert controller and access them with the alert controller's textFields property

If the new password is an empty string, present the alert again. Or another way would be to disable the "Confirm" button, enabling it only when text field has text.

UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"confirm the modification" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
    UITextField *password = alertController.textFields.firstObject;
    if (![password.text isEqualToString:@""]) {

        //change password

    }
    else{
        [self presentViewController:alertController animated:YES completion:nil];
    }
}];

Here is an updated answer for Swift 4.0 that creates the desired kind of textfield:

// Create a standard UIAlertController
let alertController = UIAlertController(title: "Password Entry", message: "", preferredStyle: .alert)

// Add a textField to your controller, with a placeholder value & secure entry enabled
alertController.addTextField { textField in
    textField.placeholder = "Enter password"
    textField.isSecureTextEntry = true
    textField.textAlignment = .center
}

// A cancel action
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { _ in
    print("Canelled")
}

// This action handles your confirmation action
let confirmAction = UIAlertAction(title: "OK", style: .default) { _ in
    print("Current password value: \(alertController.textFields?.first?.text ?? "None")")
}

// Add the actions, the order here does not matter
alertController.addAction(cancelAction)
alertController.addAction(confirmAction)

// Present to user
present(alertController, animated: true, completion: nil)

And how it looks when first presented: enter image description here

And while accepting text:

enter image description here


Swift 5.1

enter image description here

@objc func promptAddDialog() {
    let ac = UIAlertController.init(title: "Enter answer", message: nil, preferredStyle: .alert)
    ac.addTextField{ textField in
        textField.placeholder = "Answer"
        textField.textAlignment = .center
    }
    
    let submitAction = UIAlertAction(title: "Submit", style: .default) {
    [weak self, weak ac] _ in
    guard let answer = ac?.textFields?[0].text else { return }
    self?.submit(answer)
    }
    ac.addAction(submitAction)
    present(ac, animated: true)
}