在遊戲和應用中常常要實現左右滑動展示遊戲幫助、以列表顯示內容的UI效果，就像android中的Gallery和ListView。

本文通過CCScrollView和CCTableView分別來實現這兩個效果，基於cocos2d-x 2.0.4版本號。
首先來簡單了解一下這兩個東東。CCScrollView本身是一個CCLayer，而CCTableView是CCScrollView的子類，這是引擎已經幫我們封裝好了的，CCTableView能夠設置成橫向和縱向，用它能夠實現類似於Gallery和ListView的效果。
1. 首先實現遊戲幫助界面
(1) 創建頭文件GalleryLayer.h

#ifndef GALLERY_LAYER_H
#define GALLERY_LAYER_H

#include "cocos2d.h"
#include "SimpleAudioEngine.h"
#include "cocos-ext.h"

USING_NS_CC;
USING_NS_CC_EXT;

class GalleryLayer : public cocos2d::CCLayer ,public CCScrollViewDelegate
{
public:
    virtual bool init();  

    void menuCloseCallback(CCObject* pSender);

    CREATE_FUNC(GalleryLayer);

public
 
:
  //scrollview滾動的時候會調用
  void scrollViewDidScroll(CCScrollView* view);
  //scrollview縮放的時候會調用
  void scrollViewDidZoom(CCScrollView* view);

  virtual void onEnter();
  virtual void onExit();

  virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);
  virtual void ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent);
  
 
virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);
  virtual void ccTouchCancelled(CCTouch *pTouch, CCEvent *pEvent);

private:
  //依據手勢滑動的距離和方向滾動圖層
   void adjustScrollView(float offset);
   CCScrollView *m_pScrollView;
   CCPoint m_touchPoint;
   int m_nCurPage;
};

#endif

類GalleryLayer繼承了CCScrollViewDelegate，實現了它的兩個純虛函數，主要是為了當scrollview滾動和縮放時回調這兩函數。這樣我們就能夠在這兩函數中做相關操作了。

(2) 看源文件GalleryLayer.cpp

#include "GalleryLayer.h"
#include "ListViewLayer.h"

using namespace cocos2d;
using namespace cocos2d::extension;

bool GalleryLayer::init()
{
  bool bRet = false;
  do
  {
       CC_BREAK_IF( !CCLayer::init() );

     m_nCurPage = 1;
     CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
     CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

     CCLayer *pLayer = CCLayer::create();
     char helpstr[30] = {0};
     for (int i = 1; i <= 3; ++ i)
     {
       memset(helpstr, 0, sizeof(helpstr));
       sprintf(helpstr,"bg_%02d.png",i);
       CCSprite *pSprite = CCSprite::create(helpstr);
       pSprite->setPosition(ccp(visibleSize.width * (i-0.5f), visibleSize.height / 2));
       pLayer->addChild(pSprite);
     }

     m_pScrollView = CCScrollView::create(CCSizeMake(960, 640), pLayer);
     m_pScrollView->setContentOffset(CCPointZero);
     m_pScrollView->setTouchEnabled(false);
     m_pScrollView->setDelegate(this);
     m_pScrollView->setDirection(kCCScrollViewDirectionHorizontal);
     pLayer->setContentSize(CCSizeMake(960*3, 640));

     this->addChild(m_pScrollView);

     CCSpriteFrameCache *pCache =  CCSpriteFrameCache::sharedSpriteFrameCache();

     pCache->addSpriteFrame(CCSpriteFrame::create("button_normal.png",CCRectMake(0, 0, 64, 64)),"button_normal.png");
     pCache->addSpriteFrame(CCSpriteFrame::create("button_selected.png",CCRectMake(0, 0, 64, 64)),"button_selected.png");
     for (int i = 1; i <= 3; ++ i)
     {
       CCSprite *pPoint = CCSprite::createWithSpriteFrameName("button_normal.png");
       pPoint->setTag(i);
       pPoint->setPosition(ccp( origin.x + (visibleSize.width - 3 * pPoint->getContentSize().width)/2 + pPoint->getContentSize().width * (i-1), origin.y + 30));
       this->addChild(pPoint);
     }
    CCSprite *pPoint = (CCSprite *)this->getChildByTag(1);
    pPoint->setDisplayFrame(pCache->spriteFrameByName("button_selected.png"));

    bRet = true;
  }while(0);

  return bRet;

}

void GalleryLayer::menuCloseCallback(CCObject* pSender)
{

}

void GalleryLayer::scrollViewDidScroll(cocos2d::extension::CCScrollView *view)
{
  CCLOG("scroll");
}

void GalleryLayer::scrollViewDidZoom(cocos2d::extension::CCScrollView *view)
{
  CCLOG("zoom");
}

void GalleryLayer::onEnter()
{
  CCLayer::onEnter();
  CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 1, false);
}

void GalleryLayer::onExit()
{
  CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
  CCLayer::onExit();
  CCSpriteFrameCache::sharedSpriteFrameCache()->removeUnusedSpriteFrames();
}

bool GalleryLayer::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)
{
  m_touchPoint = CCDirector::sharedDirector()->convertToGL(pTouch->getLocationInView());
  return true;
}

void GalleryLayer::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent)
{

}

void GalleryLayer::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent)
{
  CCPoint endPoint = CCDirector::sharedDirector()->convertToGL(pTouch->getLocationInView());
  float distance = endPoint.x - m_touchPoint.x;
  if(fabs(distance) > 50)
  {
    adjustScrollView(distance);
  }
}

void GalleryLayer::ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent)
{
  CCPoint endPoint = CCDirector::sharedDirector()->convertToGL(pTouch->getLocationInView());
  float distance = endPoint.x - m_touchPoint.x;
  if(fabs(distance) > 50)
  {
    adjustScrollView(distance);
  }
}

void GalleryLayer::adjustScrollView(float offset)
{
  CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
  CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();
  CCSpriteFrameCache *pCache =  CCSpriteFrameCache::sharedSpriteFrameCache();
  CCSprite *pPoint = (CCSprite *)this->getChildByTag(m_nCurPage);
  pPoint->setDisplayFrame(pCache->spriteFrameByName("button_normal.png"));
  if (offset<0)
  {
    m_nCurPage ++;
  }else
  {
    m_nCurPage --;
  }

  if (m_nCurPage <1)
  {
    m_nCurPage = 1;
  }

  if(m_nCurPage > 3)
  {
    CCLayer *pLayer = ListViewLayer::create();
    CCScene *pScene = CCScene::create();
    pScene->addChild(pLayer);
    CCDirector::sharedDirector()->replaceScene(pScene);
  }
  else
  {
    pPoint = (CCSprite *)this->getChildByTag(m_nCurPage);
    pPoint->setDisplayFrame(pCache->spriteFrameByName("button_selected.png"));
    CCPoint  adjustPos = ccp(origin.x - visibleSize.width * (m_nCurPage-1), 0);
    m_pScrollView->setContentOffset(adjustPos, true);
  }
}

這裏一共同擁有三張圖，是從捕魚達人中拿出來的背景圖，當滾完三張圖時就跳轉到ListViewLayer場景去，上面的代碼比較easy懂。
首先創建一個CCLayer。包括三張背景圖。設置CCLayer的ContentSize。並設置三張圖片的位置
然後設置CCLayer為CCScrollview的內容，並設置CCScrollView的顯示區域。
最後依據用戶滑動的方向和距離，通過設置scrollview的setContentOffset，滾動視圖。
CCScrollview.h文件裏封裝了一個枚舉類型，一共同擁有四個方向。經常使用橫向和縱向，這裏使用了橫向。

typedef enum {
  kCCScrollViewDirectionNone = -1,
    kCCScrollViewDirectionHorizontal = 0,
    kCCScrollViewDirectionVertical,
    kCCScrollViewDirectionBoth
} CCScrollViewDirection;

以下來看看這部分的效果：

2. 如今來實現列表展示(ListView)的效果
（1）創建ListViewLayer.h

#ifndef LISTVIEW_LAYER_H
#define LISTVIEW_LAYER_H

#include "cocos2d.h"
#include "cocos-ext.h"

class ListViewLayer : public cocos2d::CCLayer, public cocos2d::extension::CCTableViewDataSource, public cocos2d::extension::CCTableViewDelegate
{
public:
    virtual bool init();  

    virtual void scrollViewDidScroll(cocos2d::extension::CCScrollView* view);

    virtual void scrollViewDidZoom(cocos2d::extension::CCScrollView* view);

  //處理觸摸事件，能夠計算點擊的是哪一個子項
    virtual void tableCellTouched(cocos2d::extension::CCTableView* table, cocos2d::extension::CCTableViewCell* cell);
  //每一項的寬度和高度
    virtual cocos2d::CCSize cellSizeForTable(cocos2d::extension::CCTableView *table);
  //生成列表每一項的內容
    virtual cocos2d::extension::CCTableViewCell* tableCellAtIndex(cocos2d::extension::CCTableView *table, unsigned int idx);
  //一共多少項
    virtual unsigned int numberOfCellsInTableView(cocos2d::extension::CCTableView *table);

    CREATE_FUNC(ListViewLayer);
};

#endif

ListViewLayer繼承了CCTableViewDataSource和CCTableViewDelegate。

這兩個抽象類封裝了幾個實用的函數，我們在以下的源代碼中將實現它們。

（2）源文件 ListViewLayer.cpp

#include "ListViewLayer.h"

USING_NS_CC;
USING_NS_CC_EXT;

bool ListViewLayer::init()
{
  bool bRet = false;
  do
  {
    CC_BREAK_IF( !CCLayer::init() );

    CCTableView* pTableView = CCTableView::create(this, CCSizeMake(960, 640));
    pTableView->setDirection(kCCScrollViewDirectionVertical);
    pTableView->setPosition(CCPointZero);
    pTableView->setDelegate(this);
    pTableView->setVerticalFillOrder(kCCTableViewFillTopDown);
    this->addChild(pTableView);
    pTableView->reloadData();

    bRet = true;
  }while(0);

  return bRet;
}

void ListViewLayer::tableCellTouched(CCTableView* table, CCTableViewCell* cell)
{
    CCLog("cell touched at index: %i", cell->getIdx());
}

CCSize ListViewLayer::cellSizeForTable(CCTableView *table)
{
    return CCSizeMake(960, 120);
}

CCTableViewCell* ListViewLayer::tableCellAtIndex(CCTableView *table, unsigned int idx)
{
    CCString *pString = CCString::createWithFormat("%d", idx);
    CCTableViewCell *pCell = table->dequeueCell();
    if (!pCell) {
        pCell = new CCTableViewCell();
        pCell->autorelease();
        CCSprite *pSprite = CCSprite::create("listitem.png");
        pSprite->setAnchorPoint(CCPointZero);
    pSprite->setPosition(CCPointZero);
        pCell->addChild(pSprite);

        CCLabelTTF *pLabel = CCLabelTTF::create(pString->getCString(), "Arial", 20.0);
        pLabel->setPosition(CCPointZero);
    pLabel->setAnchorPoint(CCPointZero);
        pLabel->setTag(123);
        pCell->addChild(pLabel);
    }
    else
    {
        CCLabelTTF *pLabel = (CCLabelTTF*)pCell->getChildByTag(123);
        pLabel->setString(pString->getCString());
    }

    return pCell;
}

unsigned int ListViewLayer::numberOfCellsInTableView(CCTableView *table)
{
    return 20;
}

void ListViewLayer::scrollViewDidScroll(CCScrollView *view)
{
}

void ListViewLayer::scrollViewDidZoom(CCScrollView *view)
{
}

首先須要創建CCTableView，設置它的顯示區域和顯示方向。這裏使用了縱向。設置每一個子項的寬度和高度，子項的數量以及每一個子項相應的內容。每一個子項是一個CCTableViewCell。這裏進行了優化，復用了子項對象。

以下是效果圖：

源代碼下載地址： http://download.csdn.net/detail/zhoujianghai/4975604

cocos2d-x CCScrollView和CCTableView的使用