1. 多點觸摸（EventListenerTouchAllAtOnce）
一次性接收所有觸點，適合簡單手勢。
auto listener = EventListenerTouchAllAtOnce::create();
listener->onTouchesBegan = [](const vector&, Event*){ log("onTouchesBegan"); };
listener->onTouchesMoved = [](const vector& ts, Event*){ log("touch count %zu", ts.size()); };
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
2. 單點觸摸傳遞（EventListenerTouchOneByOne）
逐個觸點處理，onTouchBegan 返回 true 表示繼續傳遞，false 停止後續事件。
auto listener = EventListenerTouchOneByOne::create();
listener->onTouchBegan = [](Touch* t, Event*){ log("onTouchBegan"); return true; };
listener->onTouchMoved = [](Touch* t, Event*){ log("onTouchMoved"); };
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
3. 加速度傳感器
需先啟用 Device::setAccelerometerEnabled(true)，再註冊監聽。
Device::setAccelerometerEnabled(true);
auto listener = EventListenerAcceleration::create([](Acceleration* a, Event*){
log("x:%g y:%g z:%g", a->x, a->y, a->z);
});
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
4. 鍵盤事件（主要用於 Android 返回鍵）
監聽 EventListenerKeyboard，處理 KEY_BACKSPACE 退出應用。
auto listener = EventListenerKeyboard::create();
listener->onKeyReleased = [](EventKeyboard::KeyCode code, Event*){
if (code == EventKeyboard::KeyCode::KEY_BACKSPACE)
Director::getInstance()->end();
};
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
