Swift动态定义NSMenu并添加响应事件

近期在一个项目中需要根据一个数组动态生成相应的NSMenu及NSMenuItem，并通过单击某个NSButton弹出，现将该部分内容整理写个小Demo，以供大家参考。

1. 首先在窗口中添加一个按钮，如下图所示：

   
   窗口中添加按钮

2. 自定义一个类并添加一套测试数据，代码如下：
   class MyClass : NSObject {
   var id: Int = 0
   var name: String = ""

        override init() {
            super.init()
        }
    
        init(id: Int, name: String) {
            self.id = id
            self.name = name
        }
    }
   
    var myArray: Array<MyClass>!
   
    self.myArray = Array<MyClass>()
    self.myArray.append(MyClass(id: 1, name: "a"))
    self.myArray.append(MyClass(id: 2, name: "b"))
    self.myArray.append(MyClass(id: 3, name: "c"))
   

3. 绑定按钮点击事件，并添加如下代码：
   @IBAction func btnCustomMenuClick(sender: AnyObject) {
   let topMenu = NSMenu.init(title: "Top")
   for myItem in self.myArray {
   let menuItem = NSMenuItem.init(title: myItem.name, action: Selector("menuItemClick:"), keyEquivalent: "")
   menuItem.representedObject = myItem
   topMenu.addItem(menuItem)
   }
   NSMenu.popUpContextMenu(topMenu, withEvent: NSApp.currentEvent!, forView: self.btnCustomMenu)
   }

4. 定义菜单项点击事件，代码如下：
   @IBAction func menuItemClick(sender: AnyObject) {
   if let obj = sender.representedObject {
   if obj is MyClass {
   let myItem = obj as! MyClass
   NSLog("id: (myItem.id), name: (myItem.name)")
   }
   }
   }

5. 编译运行并点击按钮将弹出菜单，如下图所示：

   
   点击弹出菜单

6. 分别点击菜单项，调试窗口打印如下内容：

   
   点击菜单打印内容

最后，附上该测试窗口完整代码如下：

import Cocoa

class CustomMenuTester: NSWindowController {

    @IBOutlet weak var btnCustomMenu: NSButton!

    class MyClass : NSObject {
        var id: Int = 0
        var name: String = ""
    
        override init() {
            super.init()
        }
    
        init(id: Int, name: String) {
            self.id = id
            self.name = name
        }
    }

    var myArray: Array<MyClass>!

    override var windowNibName: String {
        return "CustomMenuTester"
    }

    override func windowDidLoad() {
        super.windowDidLoad()

        // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
        self.myArray = Array<MyClass>()
        self.myArray.append(MyClass(id: 1, name: "a"))
        self.myArray.append(MyClass(id: 2, name: "b"))
        self.myArray.append(MyClass(id: 3, name: "c"))
    }

    @IBAction func btnCustomMenuClick(sender: AnyObject) {
        let topMenu = NSMenu.init(title: "Top")
        for myItem in self.myArray {
            let menuItem = NSMenuItem.init(title: myItem.name, action: Selector("menuItemClick:"), keyEquivalent: "")
            menuItem.representedObject = myItem
            topMenu.addItem(menuItem)
        }
        NSMenu.popUpContextMenu(topMenu, withEvent: NSApp.currentEvent!, forView: self.btnCustomMenu)
    }

    @IBAction func menuItemClick(sender: AnyObject) {
        if let obj = sender.representedObject {
            if obj is MyClass {
                let myItem = obj as! MyClass
                NSLog("id: \(myItem.id), name: \(myItem.name)")
            }
        }
    }

}

以上有问题或建议欢迎随时讨论，谢谢。