第三阶段：常用功能3-

--Cocos2d-x常用功能-Cocos2d-x用户交互事件处理：触摸、传感器、物理按键（共6部分）

1.Cocos2d-x单点触摸

    Size size = Director::getInstance()->getVisibleSize();
   
   
    auto label = LabelTTF::create( "Click me" , "Courier" , 30 );
    label->setPosition(size.width/ 2 , size.height/ 2 );
    addChild(label);
   
    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = [](Touch *t,Event *e){
       
        if (e->getCurrentTarget()->getBoundingBox().containsPoint(t->getLocation())) {
           
            log( "onTouchBegan" );
        }
       
        return true ;
    };
   
    listener->onTouchMoved = [](Touch* t,Event *e){
        log( "onTouchMoved" );
    };
   
    listener->onTouchEnded = [](Touch *t,Event *e){
        log( "onTouchEnd" );
    };
   

    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, label);

2.Cocos2d-x触摸目标判断

//获取当前事件目标也就是label

        if (e->getCurrentTarget()->getBoundingBox().containsPoint(t->getLocation())) {
           
            log( "onTouchBegan" );
        }

       

3.Cocos2d-x事件传递

onTouchBegan事件 return true ;之后才能执行 onTouchMoved、 onTouchEnded

    listener->onTouchMoved = [](Touch* t,Event *e){
        log( "onTouchMoved" );
    };
   
    listener->onTouchEnded = [](Touch *t,Event *e){
        log( "onTouchEnd" );
    };

   

4.Cocos2d-x多点触摸

安卓的DNK首先配置在环境变量里面

proj.android--- build_native.py

    Size visibleSize = Director::getInstance()->getVisibleSize();
   
    auto listener = EventListenerTouchAllAtOnce::create();
   
    listener->onTouchesBegan = [](std::vector<Touch*> ts,Event *e){
        log( "onTouchesBegan" );
    };
   
    listener->onTouchesMoved = [](std::vector<Touch*> ts,Event *e){
        log( "touches moved ,and touch count is %ld" ,ts.size());
    };
   
   

    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);

5.Cocos2d-x加速度

acceleration 加速度 加速   stamp 标志/ 邮票；印记   double类型  %g

JAVA ADT  里面 右键import  打开proj.android,    然后删除依赖项

cocos2d ▸ cocos ▸ platform ▸ android ▸ java ▸ src  放在JAVA ADT 的 src  里面  按下F11 选中Android Aplication

//加速度传感器默认处于关闭状态，需要打开

    Device::setAccelerometerEnabled( true );
   
    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(EventListenerAcceleration::create([](Acceleration *a,Event *e){
       
        log( "x:%g,y:%g,z:%g" ,a->x,a->y,a->z);
       

    }), this);

6.Cocos2d-x物理按键交互

    auto listener = EventListenerKeyboard::create();
    listener->onKeyReleased = [](EventKeyboard::KeyCode code,Event *e){
        log( "key code : %d" ,code);
       
        switch (code) {
            case EventKeyboard::KeyCode::KEY_BACKSPACE:
                Director::getInstance()->end();
                break ;
               
            default :
                break ;
        }
    };
   

    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);