An object representing an alternative action for a command.
- iOS 13.0+
- Mac Catalyst 13.0+
- tvOS 13.0+
UICommand object and add it to a
UIKey object when you want to provide users an alternative action for the command. The command alternate is available to the user when they press the keyboard modifier keys, like Control or Option, specified in the
For instance, an app may have a Reload menu, created with a key command, that has the keyboard shortcut Command+R. When the user selects Reload, or presses Command+R on their keyboard, the app reloads the data displayed in the current window. The app, however, can display more than one window, so it includes a Reload All alternative for Reload that reloads data in all windows, not just the current one.
The Reload All command alternate specifies
alternate in its
modifier property, which makes Reload All available to the user when they press the Option key. To select Reload All, the user can press and hold the Option key while displaying the menu that contains Reload. This replaces the Reload menu with Reload All. The user can also select Reload All by pressing Option+Command+R.