Using External Classes method as action for NSMenuItem?

Question

First time poster and very novice swift user. I've came up against a problem of using an external classes method as an action for a NSMenuItem. I've set up a new class called NewDocument have the method newDoc.

I want to use this method as an action for a NSMenuItem. However, when I use it, the menu item is greyed out? Even when I set the target to NewDocument, it still wont work.

Any guidance or help would be very much appreciated.

//Creating Instance of class
let createNewDocument = NewDocument()

//Use selector to declare method as action
let menuItem = NSMenuItem(title: "New", action: #selector(createNewDocument.newDoc), keyEquivalent: "")

//Set target to new instance of class
menuItem.target = createNewDocument

NewDocument Class

class NewDocument: NSObject {
    @objc func newDoc() {
        // new document logic
    }
}

Have a read through en.wikipedia.org/wiki/Target%E2%80%93action . Selectors are just special strings which contain the name of a method. The #selector syntax in Swift is used to have the compiler generate the string for you, to try to protect you from writing a typo. The method you want to use has to belong on an class. createNewDocument is an instance, not a class. You probably want #selector(NewDocument.newDoc). — Alexander
Is createNewDocument released because it goes out of scope? — Willeke

vadian vadian · Accepted Answer · 2021-01-12T19:06:59

The target is the instance of the class – createNewDocument
The selector is the type + method – #selector(NewDocument.newDoc)

Using External Classes method as action for NSMenuItem?

1 Answers