ScrollView与TableView实现选择效果

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在cocos2dx中，ScrollView与TableView都可以实现选择效果，其中ScrollView较为原始，TableView的格子大小可以不与winSize一样大。

ScrollView实现

#include "T25ScrollView.h"#include "AppMacros.h"CCScene* T25ScrollView::scene(){    CCScene *scene=CCScene::create();    T25ScrollView* layer=T25ScrollView::create();    scene->addChild(layer);    return scene;}bool T25ScrollView::init(){    CCLayer::init();    CCNode *node=CCNode::create();    _node=node;    char buf[]="a";    for (int i=0;i<5;i++)    {        CCSprite *s=CCSprite::create("HelloWorld.png");        node->addChild(s);        s->setPosition(ccp(i*winSize.width,0));        s->setAnchorPoint(ccp(0,0));        CCLabelTTF *label=CCLabelTTF::create(buf,"Arial",24);        buf[0]++;        s->addChild(label);        label->setPosition(ccp(winSize.width/2,winSize.height/2));    }    CCScrollView *view=CCScrollView::create(winSize,node);    addChild(view);    view->setDirection(kCCScrollViewDirectionHorizontal);    view->setContentSize(CCSizeMake(winSize.width*5,winSize.height));    view->setBounceable(false); //get rid of elastic    setTouchEnabled(true);    setTouchMode(kCCTouchesOneByOne);    return true;}bool T25ScrollView::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent){    return true;}void T25ScrollView::adjustViewPosition(float dt){    //calculate     int fitPos[]={0,-winSize.width,-winSize.width*2,-winSize.width*3,-winSize.width*4};    int x=_node->getPositionX();    int i;    for(i=0;i<5;i++)    {        int dist=abs(fitPos[i]-x);        if (dist<winSize.width/2)        {            break;        }    }    CCPoint ptDest=ccp(fitPos[i],0);    _node->runAction(CCMoveTo::create(0.2f,ptDest));}void T25ScrollView::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent){    //judge if is slider    if (isSlider(pTouch))    {        //adjust position         scheduleOnce(schedule_selector(T25ScrollView::adjustViewPosition),0.05f);        return;    }    //judge which position is clicked    CCPoint ptWorld=pTouch->getLocation();    CCPoint ptNode=_node->convertToNodeSpace(ptWorld);    int index=ptNode.x/winSize.width;    CCLog("click index =%d",index);}bool T25ScrollView::isSlider(CCTouch *PTouch){    CCPoint ptCur=PTouch->getLocation();    CCPoint ptStart=PTouch->getStartLocation();    if (ptCur.getDistanceSq(ptStart)>25)    {        return true;    }    return false;}

TableView实现

#include "T26TableView.h"#include "AppMacros.h"CCScene* T26TableView::scene(){    CCScene *scene=CCScene::create();    T26TableView* layer=T26TableView::create();    scene->addChild(layer);    return scene;}bool T26TableView::init(){    CCLayer::init();    CCSize cellSize=CCSize(80,80);    _cells=CCArray::create();    _cells->retain();    for(int i=0;i<5;i++)    {        CCTableViewCell *cell=new CCTableViewCell;        _cells->addObject(cell);        cell->autorelease();        CCSprite *sprite=CCSprite::create("p_2_01.png");        cell->addChild(sprite);        sprite->setPosition(ccp(cellSize.width/2,cellSize.height/2));    }    CCTableView *view=CCTableView::create(this,CCSize(cellSize.width*3,cellSize.height));    addChild(view);    view->setDirection(kCCScrollViewDirectionHorizontal);    view->reloadData();    view->setPosition(ccp(200,200));    //response click    view->setDelegate(this);    return true;}

其中在TableView中使用了代理的设计模式，类要继承public CCTableViewDataSource,public CCTableViewDelegate,并且实现他们的纯虚函数，从而达到代理的效果

运行效果

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