cocos2dx ScrollView 测试三 指示器

类似于iphone的主桌面，下面有一排小圆点的指示器，指示有几页，当前第几页。

ScrollView是继承CCLayer，我们直接把指示器加到这里面试试。

先加小圆点的图片进去。

HelloWorld::init方法

this->addChild(_scrollView);
CCSprite *pointer2 = CCSprite::create("pointer.png");
pointer2->setPosition(ccp(VisibleRect::center().x,200));
_scrollView->addChild(pointer2, 10);

CCSprite *pointer1 = CCSprite::create("pointer.png");
pointer1->setPosition(ccp(VisibleRect::center().x-30,200));
_scrollView->addChild(pointer1, 10);

CCSprite *pointer3 = CCSprite::create("pointer.png");
pointer3->setPosition(ccp(VisibleRect::center().x+30,200));
_scrollView->addChild(pointer3, 10);
return true;

发现上面的做法不行，小圆点跟着拖动走了....否决！！

那就把小圆点加到外面吧~~

_scrollView = MyScrollView::create(CCSizeMake(640, 1136));
//_scrollView->setContentSize();
_scrollView->setDelegate(this);
_scrollView->setTouchPriority(1);
_scrollView->setContainer(container);
_scrollView->setDirection(kCCScrollViewDirectionHorizontal);

CCSprite *pointer1 = CCSprite::create("pointer_selected.png");
pointer1->setPosition(ccp(VisibleRect::center().x-30,200));
this->addChild(pointer1, 10,101);

this->addChild(_scrollView);
CCSprite *pointer2 = CCSprite::create("pointer.png");
pointer2->setPosition(ccp(VisibleRect::center().x,200));
this->addChild(pointer2, 10,102);

CCSprite *pointer3 = CCSprite::create("pointer.png");
pointer3->setPosition(ccp(VisibleRect::center().x+30,200));
this->addChild(pointer3, 10,103);
return true;

void HelloWorld::scrollViewDidScroll(CCScrollView* view){
int offset = (int)view->getContentOffset().x;

CCTexture2D *texture = CCTextureCache::sharedTextureCache()->addImage("pointer_selected.png");
CCTexture2D *textureNor = CCTextureCache::sharedTextureCache()->addImage("pointer.png");
CCSprite *sp101 = (CCSprite*) this->getChildByTag(101);
CCSprite *sp102 = (CCSprite*) this->getChildByTag(102);
CCSprite *sp103 = (CCSprite*) this->getChildByTag(103);
sp101->setTexture(textureNor);
sp102->setTexture(textureNor);
sp103->setTexture(textureNor);
if(offset>-320){
sp101->setTexture(texture);
}else if(offset<=-320&&offset>-960){
sp102->setTexture(texture);
}else{
sp103->setTexture(texture);
}
CCLog("scrollViewDidScroll offset:%d",offset);
}

见效果图



等有时间把以上这些封装总结一下吧。