在cocos2dx中，ScrollView與TableView都可以實現選擇效果，其中ScrollView較為原始，TableView的格子大小可以不與winSize一樣大。

ScrollView實現

#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 elasticsetTouchEnabled(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 sliderif (isSlider(pTouch)){//adjust position scheduleOnce(schedule_selector(T25ScrollView::adjustViewPosition),0.05f);return;}//judge which position is clickedCCPoint 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實現

#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 clickview->setDelegate(this);return true; }

其中在TableView中使用了代理的設計模式，類要繼承public CCTableViewDataSource,public CCTableViewDelegate,并且實現他們的純虛函數，從而達到代理的效果

運行效果

總結

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