使用Layer实现对话框，在init函数中添加以下代码

auto listener = EventListenerTouchOneByOne::create();
listener->onTouchBegan = [=](Touch *touch,Event *event)
{
    return true;
};
listener->setSwallowTouches(true);
_eventDispatcher->addEventListenerWithSceneGraPHPriority(listener,this);