How to update trigger function?

[tuanphamanh91]

Hello, I initially registered an event handler for the keydown event to execute function1 as follows:

KeyboardShortcuts.onKeyDown(for: shortcut.keyboardShortcut) {
    function1()
}

Now, I want to update it to only call function2:

KeyboardShortcuts.onKeyDown(for: shortcut.keyboardShortcut) {
    function2()
}

However, when the keyboard is triggered, both function1 and function2 are being called. What should I do to resolve this issue? Thank you.

[sindresorhus]

You could use a conditional:

KeyboardShortcuts.onKeyDown(for: shortcut.keyboardShortcut) {
    if shouldCallFunc1 {
        function1()
    } else {
        function2()
    }
}

But a better solution would be to use https://swiftpackageindex.com/sindresorhus/keyboardshortcuts/2.0.1/documentation/keyboardshortcuts/keyboardshortcuts/events(_:for:), where you can easily unsubscribe as it's just an async sequence.

KeyboardShortcuts.onKeyDown is a legacy method and will eventually be deprecated when async sequences in Swift are more mature.

[tuanphamanh91]

I still can not figure it. Could you please give me an example of using https://swiftpackageindex.com/sindresorhus/keyboardshortcuts/2.0.1/documentation/keyboardshortcuts/keyboardshortcuts/events(_:for:) to register and update the trigger function. Thank you so much!

[sindresorhus]

That would be better asked on Stack Overflow, as it's not specific to this package, but rather is about how to use async sequences in general. But in short, create a Task, store a reference to the task, iterate over the async sequence in the task, and when you want to end it, call .cancel() on the Task.