首先来简单了解一下这两个东东，CCScrollView本身是一个CCLayer，而CCTableView是CCScrollView的子类，这是引擎已经帮我们封装好了的，CCTableView可以设置成横向和纵向，用它可以实现类似于Gallery和ListView的效果。
1. 首先实现游戏帮助界面
(1) 创建头文件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); void menuLeftCallback(CCObject* pSender); void menuRightCallback(CCObject* pSender); void itemfun(CCObject* pSender); CREATE_FUNC(GalleryLayer); public: //scrollview滚动的时候会调用 void scrollViewDidScroll(CCScrollView* view); //scrollview缩放的时候会调用 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: //根据手势滑动的距离和方向滚动图层 void adjustScrollView(float offset); CCScrollView *m_pScrollView; CCPoint m_touchPoint; int m_nCurPage; }; #endif
类GalleryLayer继承了CCScrollViewDelegate，实现了它的两个纯虚函数，主要是为了当scrollview滚动和缩放时回调这两函数，这样我们就可以在这两函数中做相关操作了。
(2) 看源文件GalleryLayer.cpp
#include "GalleryLayer.h"
#include "ListViewLayer.h"
using namespace cocos2d;
using namespace cocos2d::extension;
#define touchMoveDistance 100
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,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);
CCMenuItemImage* item = CCMenuItemImage::create("button_normal.png","button_selected.png",this,menu_selector(GalleryLayer::itemfun));
item->setPosition(ccp(pSprite->getContentSize().width/2,pSprite->getContentSize().height/2));
item->setTag(i);
CCMenu* menu = CCMenu::create(item,NULL);
menu->setPosition(CCPointZero);
pSprite->addChild(menu);
menu->setTouchPriority(100);
}
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(0,64,64)),"button_normal.png");
pCache->addSpriteFrame(CCSpriteFrame::create("button_selected.png","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"));
CCMenuItemImage* itemleft = CCMenuItemImage::create("CloseNormal.png","CloseSelected.png",menu_selector(GalleryLayer::menuLeftCallback));
itemleft->setPosition(ccp(60,visibleSize.height/2));
CCMenuItemImage* itemright = CCMenuItemImage::create("CloseNormal.png",menu_selector(GalleryLayer::menuRightCallback));
itemright->setPosition(ccp(visibleSize.width - 60,visibleSize.height/2));
CCMenu* menu3 = CCMenu::create(itemleft,itemright,NULL);
menu3->setPosition(CCPointZero);
this->addChild(menu3);
bRet = true;
}while(0);
return bRet;
}
void GalleryLayer::menuCloseCallback(CCObject* pSender)
{
}
void GalleryLayer::menuLeftCallback(CCObject* pSender)
{
adjustScrollView(touchMoveDistance);
}
void GalleryLayer::menuRightCallback(CCObject* pSender)
{
adjustScrollView(-touchMoveDistance);
}
void GalleryLayer::itemfun(CCObject* pSender)
{
CCMenuItemImage* item = (CCMenuItemImage*)pSender;
int tag = item->getTag();
CCLog("tag==%d",tag);
}
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) > touchMoveDistance)
{
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) > touchMoveDistance)
{
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);
}
}
这里一共有三张图，是从捕鱼达人中拿出来的背景图，当滚完三张图时就跳转到ListViewLayer场景去，上面的代码比较容易懂。
首先创建一个CCLayer，包含三张背景图，设置CCLayer的ContentSize，并设置三张图片的位置
然后设置CCLayer为CCScrollview的内容，并设置CCScrollView的显示区域。
最后根据用户滑动的方向和距离，通过设置scrollview的setContentOffset，滚动视图。
CCScrollview.h文件中封装了一个枚举类型，一共有四个方向，常用横向和纵向，这里使用了横向。
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typedef
enum
{
kCCScrollViewDirectionNone = -1,
kCCScrollViewDirectionHorizontal = 0,
kCCScrollViewDirectionVertical,
kCCScrollViewDirectionBoth
} CCScrollViewDirection;
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2. 现在来实现列表展示(ListView)的效果
（1）创建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);
//处理触摸事件，可以计算点击的是哪一个子项
virtual void tableCellTouched(cocos2d::extension::CCTableView* table,cocos2d::extension::CCTableViewCell* cell);
//每一项的宽度和高度
virtual cocos2d::CCSize cellSizeForTable(cocos2d::extension::CCTableView *table);
//生成列表每一项的内容
virtual cocos2d::extension::CCTableViewCell* tableCellAtIndex(cocos2d::extension::CCTableView *table,unsigned int idx);
//一共多少项
virtual unsigned int numberOfCellsInTableView(cocos2d::extension::CCTableView *table);
CREATE_FUNC(ListViewLayer);
};
#endifListViewLayer继承了CCTableViewDataSource和CCTableViewDelegate。这两个抽象类封装了几个有用的函数，我们在下面的源码中将实现它们。
（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)
{
}
首先需要创建CCTableView，设置它的显示区域和显示方向，这里使用了纵向。设置每个子项的宽度和高度，子项的数量以及每个子项对应的内容。每个子项是一个CCTableViewCell，这里进行了优化，复用了子项对象。
下面是效果图：
