macos - swift:どのようにラジオ メニューを相互に排他的にするのですか?

Question

ラジオメニューを実現したい、私の世代のメニューはこちら

subMenu.addItemWithTitle("Item001", action: Selector("testAction:"), keyEquivalent: "\(code)")
subMenu.addItemWithTitle("Item002", action: Selector("testAction:"), keyEquivalent: "\(code)")
subMenu.addItemWithTitle("Item003", action: Selector("testAction:"), keyEquivalent: "\(code)")
subMenu.addItemWithTitle("Item004", action: Selector("testAction:"), keyEquivalent: "\(code)")
subMenu.addItemWithTitle("Item005", action: Selector("testAction:"), keyEquivalent: "\(code)")
subMenu.addItemWithTitle("Item006", action: Selector("testAction:"), keyEquivalent: "\(code)")

どのようにラジオメニュー？

func testAction(sender: NSMenuItem){
    sender.state = Int(!Bool(sender.state))
    if(sender.action == Selector("testAction:")){
        var itemMore:NSMenuItem!
        for itemMore:AnyObject in sender.menu.itemArray {
            if (itemMore.action() == sender.action){
                itemMore.state = (itemMore == sender) ? NSOnState : NSOffState;
            }
        }
    }
}

Answer 1

これはどう

func testAction(sender: NSMenuItem){
    sender.state = Int(!Bool(sender.state))
    if(sender.action == Selector("testAction:")) {
        var itemMore:NSMenuItem!
        for itemMore:AnyObject in sender.menu.itemArray {
            if let menuItem = itemMore as? NSMenuItem {  // -- need to downcast first
                if (menuItem.action == sender.action){
                    menuItem.state = (menuItem == sender) ? NSOnState : NSOffState;
                }
            }
        }
    }
}

Answer 2

Objective-Cで書きます。Swift への翻訳はあなた次第です。

for (NSMenuItem* item in [[sender menu] itemArray])
{
    if (item.action == sender.action)
        item.state = (item == sender) ? NSOnState : NSOffState;
}