NotificationCenter的基本使用

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NotificationCenter的基本使用：</span>

init方法中：</span>

NotificationCenter::getInstance()->addObserver(this, callfuncO_selector(HelloWorld::call2),"abc",nullptr); //添加观察对象  auto b1 = MenuItemImage::create("CloseNormal.png","CloseNormal.png",CC_CALLBACK_0(HelloWorld::call, this)); //按钮   auto menu = Menu::create(b1, nullptr);this->addChild(menu);

对应的方法：</span>

void HelloWorld::call(){log("call()");NotificationCenter::getInstance()->postNotification("abc", this);}void HelloWorld::call2(Ref* obj){log("call2()");auto s = Sprite::create("CloseNormal.png");s->setPosition(Vec2(100,100));this->addChild(s);}

</pre><pre name="code" class="cpp">最后：

HelloWorld::~HelloWorld(){<span style="white-space:pre"></span>NotificationCenter::getInstance()->removeObserver(this,"abc");  //取消监听   <span style="white-space:pre"></span>//NotificationCenter::getInstance()->removeAllObservers(this);}

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