popScene 动画

需要修改引擎的Director::popScene()函数，也可以进行重载或者设置默认参数。

void Director::popScene(const std::function<void(Scene* &)>& callback)

{

CCASSERT(_runningScene != nullptr, "running scene should not null");

_scenesStack.popBack();

ssize_t c = _scenesStack.size();

if (c == 0)

{

end();

}

else

{

_sendCleanupToScene = true;

_nextScene = _scenesStack.at(c - 1);

if(callback)

callback(_nextScene);

}

}

使用方式：

auto callback = [](Scene*& scene){scene = TransitionJumpZoom::create(1.0f, scene);};

Director::getInstance()->popScene(callback);