我这样做是为了捕捉Android设备上的Home和Back按钮按下事件:覆盖voidLayer::onKeyReleased(EventKeyboard::KeyCodekeyCode,Event*event)函数如下:voidMyLayer::onKeyReleased(EventKeyboard::KeyCodekeyCode,Event*event){if(keyCode==EventKeyboard::KeyCode::KEY_BACKSPACE/*KeyboardEvent::KeyCode::Menu(KEY_BACKSPACE)*/){CCLOG("Youpressedb