---
title: "doCommand(by:command:)"
framework: InputMethodKit
role: symbol
role_heading: Instance Method
platforms: [macOS 10.5+]
path: "inputmethodkit/imkinputcontroller/docommand(by:command:)"
---

# doCommand(by:command:)

Passes commands that are not generated as part of the text input process.

## Declaration

```swift
func doCommand(by aSelector: Selector!, command infoDictionary: [AnyHashable : Any]!)
```

## Parameters

- `aSelector`: A selector that represents a command from the text input menu.
- `infoDictionary`: A dictionary that contains two key-value pairs: doc://com.apple.inputmethodkit/documentation/InputMethodKit/kIMKCommandMenuItemName, whose value is an NSMenuItem object. That is, the item selected by the user. doc://com.apple.inputmethodkit/documentation/InputMethodKit/kIMKCommandClientName, whose value is the current client—id<IMKTextInput, NSObject>.

## Discussion

Discussion The default implementation checks if the input controller object (that is, self) responds to the selector. If so, it sends the message perform(_:with:) to the input controller class. The object parameter in that case is the infoDictionary parameter. This method is called when a user selects a command from the text input menu. To support this, an input method must provide actions for each menu item that is placed in the menu. For example, (void)menuAction:(id)sender. Note that the sender in this instance is the info dictionary.

## See Also

### Working with Custom Commands

- [menu()](inputmethodkit/imkinputcontroller/menu().md)