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我在cocos2dx中構建了一個遊戲,其中我必須創建菜單項標籤。我創建它們在一個循環,然後在菜單中添加它們:在cocos2dx中創建菜單項標籤時聲明失敗
auto menuForNumberButtons = Menu::create();
menuForNumberButtons->setPosition(Vec2(0,0));
this->addChild(menuForNumberButtons, 3);
for (int yy = 0; yy < 3; yy++)
{
for (int xx = 0; xx < 3; xx++)
{
counterOfNumers++;
MenuItemLabel *numberButton=MenuItemLabel::create(Label::createWithTTF(String::createWithFormat("%d",counterOfNumers)->getCString(), "arial.ttf", visibleSize.width*0.05), this, menu_selector(BSHSuDokuKeypad::numberButtonPressed));
numberButton->setScaleX(widthOfNumberCell*0.5/numberButton->getBoundingBox().size.width);
numberButton->setScaleY(heightOfNumberCell*0.5/numberButton->getBoundingBox().size.height);
numberButton->setPosition(Vec2(visibleSize.width*0.005+widthOfNumberCell*xx + numberButton->getBoundingBox().size.width*0.5, visibleSize.height*0.7+ heightOfNumberCell*yy + numberButton->getBoundingBox().size.height*0.5));
menuForNumberButtons->addChild(numberButton);}}
但是當我點擊任何數字。它給我一個錯誤,說沒有調用回調函數,斷言失敗。 有什麼幫助嗎?
語法是正確的。加上菜單項標籤創建很好,即我可以在屏幕上看到它們。問題是什麼與menu_selector。反正非常感謝 – nullPointerException 2015-04-03 05:59:37
有趣的是,當你點擊其中一個數字時會調用什麼方法? – 2015-04-03 06:39:39
numberButtonPressed被稱爲 – nullPointerException 2015-04-03 07:15:44