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。