cocos2d-x3.0的touch事件
// v2.2 v3.0
CCDirector Director
CCLayer Layer
CCScene Scene
CCSprite Sprite
Scene* HelloWorld::createScene()
{
auto scene = Scene::create();
auto layer = HelloWorld::create();
scene->addChild(layer);
return scene;
}
bool HelloWorld::init()
{
if ( !Layer::init() )
{
return false;
}
//3.0 获得导演的单例 Director::sharedDirector() 改为了Director::getInstance() 但是还是向下兼容的 CC_DEPRECATED_ATTRIBUTE static Director* sharedDirector() { return Director::getInstance(); }
Size visibleSize = Director::getInstance()->getVisibleSize(); //获得现实区域
Point origin = Director::getInstance()->getVisibleOrigin(); //获得现实的起点坐标
// auto 是cocos2d-x3.0 变动大得一面
// auto 自动类型变量
// 比如原来要指定变量是int还是float，现在可以用auto，在赋值的时候，编译器自动识别类型。
// 这个是C++11的新标准，你可以参考C++11新标准文档。
//CC_CALLBACK_1 是新的事件回调从 0-3各自有自己的回调参数 细节可以看次篇博客 http://www.2cto.com/kf/201401/275831.html
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));
closeItem->setPosition(Point(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
origin.y + closeItem->getContentSize().height/2));
auto menu = Menu::create(closeItem, NULL);
menu->setPosition(Point::ZERO);//以前cpp（x，y） 现在左边 都是Point 比如颜色 ccWHITE 也改成了Color3B::WHITE
this->addChild(menu, 2);
auto label = LabelTTF::create("Hello World", "Arial", 24);
label->setPosition(Point(origin.x + visibleSize.width/2,
origin.y + visibleSize.height - label->getContentSize().height));
this->addChild(label, 1,101);
//这种事件的创建方式 比较以前 更加明了 更加直观
// 触摸事件（EventListenerTouch）
// 键盘响应事件（EventListenerKeyboard）
// 加速记录事件（EventListenerAcceleration）
// 鼠标相应事件（EventListenerMouse）
// 自定义事件（EventListenerCustom）
//（移除事件监听器
//移除一个已经被添加了的监听器：
//_eventDispatcher->removeEventListener(listener);
//
//移除当前事件分发器中所有监听器：
//_eventDispatcher->removeAllEventListeners();
auto listener = EventListenerTouchOneByOne::create(); //创建一个单点触摸事件 :EventListenerTouchAllAtOnce 为多点
//设置这些事件的的回调方法
listener->onTouchBegan = CC_CALLBACK_2(HelloWorld::onTouchBegan, this);
listener->onTouchEnded = CC_CALLBACK_2(HelloWorld::onTouchEnded, this);
listener->onTouchMoved = CC_CALLBACK_2(HelloWorld::onTouchMoved, this);
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this); //事件调度器
return true;
}
void HelloWorld::onTouchMoved(cocos2d::Touch *touch, cocos2d::Event *event){
printf("move");
}
bool HelloWorld::onTouchBegan(Touch* touch, Event *event)
{
return true;
}
//通过点击结束区域 来设置 lable的位置
void HelloWorld::onTouchEnded(Touch* touch, Event *event)
{
auto location = touch->getLocation();
auto s = getChildByTag(101);
//一下 只是个旋转角度 移动的 无关紧要
s->stopAllActions();
s->runAction( MoveTo::create(1, Point(location.x, location.y) ) );
float o = location.x - s->getPosition().x;
float a = location.y - s->getPosition().y;
float at = (float) CC_RADIANS_TO_DEGREES( atanf( o/a) );
if( a < 0 )
{
if( o < 0 )
at = 180 + fabs(at);
else
at = 180 - fabs(at);
}
s->runAction( RotateTo::create(1, at) );
}
void HelloWorld::menuCloseCallback(Ref* pSender)
{
auto menuItem = static_cast(pSender); //获得点击的按钮
printf("pSender-tag==%d",menuItem->getTag());
MessageBox("你点击了按钮!!","提示");//提示框
}
lambda 写法 挺有意思 下面写的 和上面功能完全一样
bool HelloWorld::init()
{
if ( !Layer::init() )
{
return false;
}
Size visibleSize = Director::getInstance()->getVisibleSize(); //获得现实区域
Point origin = Director::getInstance()->getVisibleOrigin(); //获得现实的起点坐标
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
[](Ref *sender){
auto menuItem = static_cast(sender); //获得点击的按钮
printf("pSender-tag==%d",menuItem->getTag());
MessageBox("你点击了按钮!!","提示");//提示框
});
closeItem->setPosition(Point(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
origin.y + closeItem->getContentSize().height/2));
auto menu = Menu::create(closeItem, NULL);
menu->setPosition(Point::ZERO);
this->addChild(menu, 2);
auto label = LabelTTF::create("Hello World", "Arial", 24);
label->setPosition(Point(origin.x + visibleSize.width/2,
origin.y + visibleSize.height - label->getContentSize().height));
this->addChild(label, 1,101);
auto listener = EventListenerTouchOneByOne::create();
listener->onTouchBegan = [](Touch*touch,Event*event)
{
return true
;
};
listener->onTouchEnded = [](Touch*touch,Event*event){
auto location = touch->getLocation();
auto target = static_cast
(event->getCurrentTarget());auto s = target->getChildByTag(101);
//一下 只是个旋转角度 移动的 无关紧要
s->stopAllActions();
s->runAction( MoveTo::create(1, Point(location.x, location.y) ) );
float o = location.x - s->getPosition().x;
float a = location.y - s->getPosition().y;
float at = (float) CC_RADIANS_TO_DEGREES( atanf( o/a) );
if( a < 0 )
{
if( o < 0 )
at = 180 + fabs(at);
else
at = 180 - fabs(at);
}
s->runAction( RotateTo::create(1, at) );
};
listener->onTouchMoved = [](Touch*touch,Event*event){
printf("move");
};
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this); //事件调度器
return true;
}