有没有一种方法可以把NSToolbarButton和MainViewController连接起来？

let toolbar = NSToolbar(identifier: "MyToolbar")
toolbar.delegate = self
window?.toolbar = toolbar

extension MainViewController: NSToolbarDelegate {
    func toolbarAllowedItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
        return [.NSToolbarFlexibleSpaceItem, .NSToolbarSpaceItem, .NSToolbarSeparatorItem, .customButton]
    }
    
    func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
        return [.customButton]
    }
    
    func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: NSToolbarItem.Identifier, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
        if itemIdentifier == .customButton {
            let buttonItem = NSToolbarItem(itemIdentifier: itemIdentifier)
            buttonItem.label = "Custom Button"
            buttonItem.target = self
            buttonItem.action = #selector(customButtonClicked(_:))
            buttonItem.view = NSToolbarButton(image: NSImage(named: NSImage.Name("CustomButtonImage")), target: self, action: #selector(customButtonClicked(_:)))
            return buttonItem
        }
        
        return nil
    }
    
    @objc func customButtonClicked(_ sender: Any) {
        // 处理自定义按钮点击事件
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    if let window = view.window {
        window.toolbar?.delegate = self
    }
}