1.按键触发事件 EventListenerKeyboard:重写onKeyPressed和onKeyReleased;
实现如下:
auto keyListener = EventListenerKeyboard::create();
keyListener->onKeyPressed = [](EventKeyboard::KeyCode keyCode, Event* event){ log("Key %d pressed.", keyCode); };
keyListener->onKeyReleased = [](EventKeyboard::KeyCode keyCode, Event* event){ log("Key %d released.", keyCode); };
// 添加监听器
_eventDispatcher->addEventListenerWithSceneGraphPriority(keyListener, this);
2.自定义监听事件,方便与跨类调用
比如我在HelloWorld类中写
//1,创建监听器
EventListenerCustom* customListener = EventListenerCustom::create("ShowOtherNode",
CC_CALLBACK_1(HelloWorld::ShowOtherNode, this));
//2,注册监听器
getEventDispatcher()->addEventListenerWithSceneGraphPriority(customListener, this);
然后在自定义类中调用,我事先开启了调度器的update,在update中调用
//3,自定义事件触发条件,以下两种方法调用
//(1)创建自定义事件对象
int showRole = 1;
EventCustom custom("ShowOtherNode");
custom.setUserData(&showRole); //附带数据,附加参数
//(2)分发器分发自定义事件
Director::getInstance()->getEventDispatcher()->dispatchEvent(&custom);
3,鼠标响应事件
auto mouseListener = EventListenerMouse::create();
mouseListener->onMouseDown = [](Event* event){ log("Mouse Down"); };
mouseListener->onMouseUp = [](Event* event){ log("Mouse Up"); };
mouseListener->onMouseMove = [](Event* event){ log("Mouse Move"); };
mouseListener->onMouseScroll = [](Event* event){ log("Mouse Scroll"); };
_eventDispatcher->addEventListenerWithSceneGraphPriority(mouseListener, this);
4.加速器事件
//看看Cocos2d-x中关于加速器的代码:
class Acceleration
{
public:
double x;
double y;
double z;
double timestamp;
Acceleration(): x(0), y(0), z(0), timestamp(0) {}
};
/*该类中每个方向的加速度大小都为一个重力加速度大小。在使用加速计事件监听器之前,需要使用以下代码先启用此硬件设备:*/
Device::setAccelerometerEnabled(true);
/*然后创建对应的监听器,在创建回调函数时,可以使用Lambda表达式创建匿名函数,也可以绑定已有的函数逻辑实现,如下:*/
auto listener = EventListenerAcceleration::create([=](Acceleration* acc, Event* event){
//逻辑代码段
});
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);