ccos2dx CCScrollView使用

最新推荐文章于 2021-03-15 23:30:46 发布

原创最新推荐文章于 2021-03-15 23:30:46 发布 · 639 阅读

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CC 4.0 BY-SA版权

本文介绍如何使用 Cocos2d-x 创建滚动视图，包括初始化滚动视图、处理触摸事件及调整滚动视图的显示内容等关键技术点。

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#pragma  once;
#include "cocos2d.h"
#include "cocos-ext.h"
USING_NS_CC;
USING_NS_CC_EXT;
class scrollViewTest:public CCLayer,public CCScrollViewDelegate  {
public:
	CREATE_FUNC(scrollViewTest);
	static cocos2d::CCScene* scene();

	virtual bool init();
	bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);
	void ccTouchMoved(CCTouch * touch,CCEvent * pEvent);
	void ccTouchEnded(CCTouch * touch,CCEvent * pEvent);
	void registerWithTouchDispatcher();
	CCScrollView* scrollview;
	virtual void scrollViewDidScroll (CCScrollView *view);
		virtual void 	scrollViewDidZoom (CCScrollView *view);
};

#include "scrollViewTest.h"

cocos2d::CCScene* scrollViewTest::scene()
{
	CCScene * scene=CCScene::create();
	scene->addChild(scrollViewTest::create());
	return scene;
}

bool scrollViewTest::init()
{
	if(!CCLayer::init()){return false;}
	CCSize size=CCDirector::sharedDirector()->getWinSize();


	CCLayer* layer=CCLayerColor::create(ccc4(255,0,0,255));
	for (int i=0;i<5;i++)
	{
		CCSprite* sprite1=CCSprite::create("HelloWorld.png");
		sprite1->setPosition(ccp(size.width*(i+0.5f),size.height/2));
		layer->addChild(sprite1,2);
	}
	//scrollview=CCScrollView::create(size/2,layer); //设置显示的区域
	scrollview=CCScrollView::create(size,layer);
	scrollview->setDelegate(this);
	scrollview->setContentSize(ccp(size.width*5,size.height)); //设置内容的大小
	scrollview->setDirection(kCCScrollViewDirectionHorizontal);
	scrollview->setContentOffset(CCPoint(0,0));
	scrollview->setBounceable(true);   //设置有弹性效果
	this->addChild(scrollview);
	this->setTouchEnabled(true);
	
	return true;
}
void scrollViewTest::registerWithTouchDispatcher()
{
	CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this,0,true);}
bool scrollViewTest::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)
{
	return true;
}

void scrollViewTest::ccTouchMoved(CCTouch * touch,CCEvent * pEvent)
{
	
}

void scrollViewTest::ccTouchEnded(CCTouch * touch,CCEvent * pEvent)
{
	CCLOG("ccTouchEnded");
	scrollview->unscheduleAllSelectors();  
	float offsetX=scrollview->getContentOffset().x;  //返回的是负数
	float winX=CCDirector::sharedDirector()->getWinSize().width;
	float div=fabs(offsetX/winX);
	int curPage=(int)div;
	if(div+0.5>(int)(div+1)){
		curPage++;
	}
	float offx=curPage*(-winX);
	CCLOG("%f,%f,%f,%d,%f",offsetX,winX,div,curPage,offx);
	scrollview->setContentOffsetInDuration(ccp(offx,0),0.5f);  
}

void scrollViewTest::scrollViewDidScroll(CCScrollView *view)
{
	//CCLOG("scrollViewDidScroll");
	//float offsetX=view->getContentOffset().x;  //返回的是负数
	//float winX=CCDirector::sharedDirector()->getWinSize().width;
	//float div=fabs(offsetX/winX);
	//int curPage=(int)div;
	//if(div+0.5>(int)(div+1)){
	//	curPage++;
	//}
	//*view->setContentOffset(ccp(curPage*(-winX),0)); //会有冲突，不是结束滑动的事件 ,放在父类的touch事件中
	//CCLOG("%f,%f,%f,%d",offsetX,winX,div,curPage);
}

void scrollViewTest::scrollViewDidZoom(CCScrollView *view)
{
	CCLOG("scrollViewDidZoom");
}