Cocos2dx多点触摸实例

bool MyTouchEvent2::init()
{
if (!Layer::init())
{
return false;
}
Size visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();

/创建3个文本标签

Label * text1 = Label::create("","Arial",24);
text1->setPosition(Point(400,280));
this->addChild(text1,1,1);


Label * text2 = Label::create("",24);
text2->setPosition(Point(400,200));
this->addChild(text2,2);


Label * text3 = Label::create("",24);
text3->setPosition(Point(400,100));
this->addChild(text3,3);


//创建多点触摸监听器
auto listener = EventListenerTouchAllAtOnce::create();

//单击
listener->onTouchesBegan = [&](const std::vector<Touch*>& touchs,Event* event)
{
auto text = (Label *)this->getChildByTag(1);
int num = touchs.size();
text->setString(Value(num).asString() + "Touches:");

};

// 移动

listener->onTouchesMoved = [&](const std::vector<Touch*>& touchs,Event* event)
{
auto text = (Label *)this->getChildByTag(2);
int num = touchs.size();
std::string str = Value(num).asString() + "Touches:";
for (auto & touch:touchs)
{
auto location = touch->getLocation();
str += "[touchID" + Value(touch->getID()).asString() + "]";
}
text->setString(str);

};

// 松开

listener->onTouchesEnded = [&](const std::vector<Touch*>& touchs,Event* event) { auto text = (Label*)this->getChildByTag(3); int num = touchs.size(); text->setString(Value(num).asString()+"Touches:"); }; //注册监听事件 _eventDispatcher->addEventListenerWithSceneGraphPriority(listener,this); return true; }