# init(input:modifierFlags:action:discoverabilityTitle:) Creates a key command object that matches the specified input and has a title. ``` convenience init(input: String, modifierFlags: UIKeyModifierFlags, action: Selector, discoverabilityTitle: String) ``` ## Parameters `input` The keys that a person must press. The string must contain one or more characters corresponding to the keys a person pressed. For a list of special characters that don’t have a textual representation, see [Input strings for special keys](/documentation/UIKit/input-strings-for-special-keys). `modifierFlags` The bit mask of modifier keys that a person must press. You can use this parameter to specify which modifier keys (Command, Option, and so on) a person must also press. You may specify more than one modifier key. For a list of possible values, see [`UIKeyModifierFlags`](/documentation/UIKit/UIKeyModifierFlags). `action` The action method to execute on the responder object. `discoverabilityTitle` An elaborated title that explains the purpose of the key command. ## Return Value The initialized key command object. ## Discussion After creating a key command object, you can add it to a view controller using the [`addKeyCommand(_:)`](/documentation/UIKit/UIViewController/addKeyCommand(_:)) method of the view controller. You can also override any responder class and return the key command directly from the responder’s [`keyCommands`](/documentation/UIKit/UIResponder/keyCommands) property. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)