cocos2d-x 实现精灵拖动效果
#include "HelloWorldScene.h"
USING_NS_CC;
CCScene* HelloWorld::scene()
{
// 'scene' is an autorelease object
CCScene *scene = CCScene::create();
// 'layer' is an autorelease object
HelloWorld *layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !CCLayer::init() )
{
return false;
}
//
//创建一个节点
CCNode *pNode = CCNode::create();
// pNode->setScale(0.5);
//将节点作为子节点加入场景类中
this->addChild(pNode, 0);
//
/////////////////////////////
// 2. add a menu item with "X" image, which is clicked to quit the program
// you may modify it.
// add a "close" icon to exit the progress. it's an autorelease object
CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
this,
menu_selector(HelloWorld::menuCloseCallback));
pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20,
20));
// create menu, it's an autorelease object
CCMenu* pMenu = CCMenu::create(pCloseItem, NULL);
pMenu->setPosition(CCPointZero);
pNode->addChild(pMenu, 1);
/////////////////////////////
// 3. add your codes below...
// add a label shows "Hello World"
// create and initialize a label
CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "Arial", 24);
CCSize size = CCDirector::sharedDirector()->getWinSize();
// position the label on the center of the screen
pLabel->setPosition(ccp(size.width/2,
size.height - 20));
// add the label as a child to this layer
pNode->addChild(pLabel, 1);
// add "HelloWorld" splash screen"
CCSprite* pSprite = CCSprite::create("HelloWorld.png");
// position the sprite on the center of the screen
pSprite->setPosition(ccp(size.width/2 , size.height/2 ));
// add the sprite as a child to this layer
pNode->addChild(pSprite, 0);
// pNode->setPosition(ccp(50, 50));
hero = CCSprite::create("grossini.png");
hero->setPosition(ccp(size.width/2,size.height/2));
// pNode->setScale(0.5);
pNode->addChild(hero,1);
setTouchEnabled(true);
return true;
}
void HelloWorld::menuCloseCallback(CCObject* pSender)
{
CCDirector::sharedDirector()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
exit(0);
#endif
}
void HelloWorld::registerWithTouchDispatcher()
{
CCDirector*pDirector = CCDirector::sharedDirector();
pDirector->getTouchDispatcher()->addTargetedDelegate(this, 0, true);
}
bool HelloWorld::ccTouchBegan(CCTouch * touch,CCEvent* event)
{
CCPoint heropos = hero->getPosition();
CCPoint location = touch->getLocationInView();
location = CCDirector::sharedDirector()->convertToGL(location);
if (location.x > heropos.x - 42.5 && location.x < heropos.x + 42.5 && location.y > heropos.y - 60.5 && location.y < heropos.y + 60.5)
{
isControl = true;
deltax = location.x - heropos.x;
deltay = location.y - heropos.y;
}
return true;
}
void HelloWorld::ccTouchMoved(CCTouch * touch,CCEvent* event)
{
if (isControl)
{
CCPoint location = touch->getLocationInView();
location = CCDirector::sharedDirector()->convertToGL(location);
float x = location.x - deltax;
float y = location.y - deltay;
hero->setPosition(ccp(x,y));
}
}
void HelloWorld::ccTouchEnded(CCTouch * touch, CCEvent * event)
{
isControl = false;
}
void HelloWorld::ccTouchCancelled(CCTouch *touch, CCEvent *event)
{
isControl = false;
}