单击/打开nsstatusitem时刷新nsmenuitem

Question

我有以下扩展名，其中我的状态为ON或OFF：

extension AppDelegate {
    
    func createStatusBarItem() {
        let sBar = NSStatusBar.system
        
        // create status bar item in system status bar
        sBarItem = sBar.statusItem(withLength: NSStatusItem.squareLength)
        ...
        
        let sBarMenu = NSMenu(title: "Options")
        
        // assign menu to status bar item
        sBarItem.menu = sBarMenu
        
        let enableDisableMenuItem = NSMenuItem(title: "Enabled", action: #selector(toggleAdvancedMouseHandlingObjc), keyEquivalent: "e")
        enableDisableMenuItem.state = sHandler.isAdvancedMouseHandlingEnabled() ? NSControl.StateValue.on : NSControl.StateValue.off
        sBarMenu.addItem(enableDisableMenuItem)
        
        ...
    }
    
    @objc func toggleAdvancedMouseHandlingObjc() {
        if sHandler.isAdvancedMouseHandlingEnabled() {
            sHandler.disableAdvancedMouseHandling()
        } else {
            sHandler.enableAdvancedMouseHandling()
        }
    }
}

一旦我想更改Shandler对象的状态，我也想将此更改转介给NSMENUITEM并启用或禁用复选标记取决于Nshandler的状态。

但是，看起来菜单仅在首次启动时才建成。如何重新触发菜单项以显示或不显示复选标记？

Answer 1

在您的应用程序委托中保留对创建的nsmenuitem的引用，并更新其状态（假设您仅在单个菜单中使用该项目）。

class AppDelegate: NSApplicationDelegate {

    var fooMenuItem: NSMenuItem?

}

    func createStatusBarItem() {
        ...
        let enableDisableMenuItem = NSMenuItem(title: "Enabled", action: #selector(toggleAdvancedMouseHandlingObjc), keyEquivalent: "e")
        self.fooMenuItem = enableDisableMenuItem
        ...
    }

    @objc func toggleAdvancedMouseHandlingObjc() {
        if sHandler.isAdvancedMouseHandlingEnabled() {
            sHandler.disableAdvancedMouseHandling()
        } else {
            sHandler.enableAdvancedMouseHandling()
        }

        self.fooMenuItem.state = sHandler.isAdvancedMouseHandlingEnabled() ? NSControl.StateValue.on : NSControl.StateValue.off
    }