cocos 2dx_lua鍵盤監聽

local function keyboardPressed(KeyCode,event)
        print(KeyCode)
    end
    local function keyboardReleased(KeyCode,event)
    end
    local listener = cc.EventListenerKeyboard:create()  
    listener:registerScriptHandler(keyboardPressed, cc.Handler.EVENT_KEYBOARD_PRESSED)  
    listener:registerScriptHandler(keyboardReleased, cc.Handler.EVENT_KEYBOARD_RELEASED)  
    local eventDispatcher = self:getEventDispatcher()  
    eventDispatcher:addEventListenerWithSceneGraphPriority(listener,self)