//在场景切换的时候加上遮罩
CCLayerColor *layer = CCLayerColor::create(ccc4(1,22,33,233), sizef.width, sizef.height);
CCLog("%f,%f",sizef.width,sizef.height);
CCLabelTTF*test=CCLabelTTF::create("等待。。。。","Helvetica", 12);
layer->addChild(test);
test->setColor(ccc3(3, 4, 5));
test->cocos2d::CCNode::setPosition(sizef.width/2, sizef.height/2);
CCDirector::sharedDirector()->setNotificationNode(layer);
CCDirector::sharedDirector()->drawScene();
CCDirector::sharedDirector()->replaceScene(HelloWorld::scene());
//在scene return 后去掉遮罩
CCScene* HelloWorld::scene()
{
CCScene *scene = CCScene::create();
HelloWorld *layer = HelloWorld::create();
scene->addChild(layer);
CCDirector::sharedDirector()->setNotificationNode(NULL);
return scene;
}