CollectionView数据源

类说明

CACollectionView的数据代理

CACollectionViewDataSource 方法（点击查看方法介绍）

CACollectionViewDataSource 方法说明

virtual CACollectionViewCell* collectionCellAtIndex(CACollectionView *collectionView, const DSize& cellSize, unsigned int section, unsigned int row, unsigned int item)

返回值：virtual CACollectionViewCell*

参数：

解释：获取指定cell

示例：

CACollectionViewCell* CollectionViewTest::collectionCellAtIndex(CACollectionView *collectionView, 
const CCSize& cellSize, unsigned int section, unsigned int row, unsigned int item)
{
    CACollectionViewCell* p_Cell = collectionView->dequeueReusableCellWithIdentifier("CrossApp");
    if (p_Cell == NULL)
    {
        p_Cell = CACollectionViewCell::create("CrossApp");
        CAImageView* itemView = CAImageView::createWithImage(CAImage::create("logo.png"));
        itemView->setCenter(CCRect(cellSize.width*0.5,cellSize.height*0.5,cellSize.height * 0.90,cellSize.height * 0.90));
        itemView->setTag(99);
        p_Cell->addSubview(itemView);
  
        CALabel* itemText = CALabel::createWithCenter(CCRect(itemView->getBounds().size.width*0.5, 
                                                            itemView->getBounds().size.height*0.5, 
                                                            itemView->getBounds().size.width*0.6, 
                                                            itemView->getBounds().size.width*0.5));
        itemText->setTag(100);
        itemText->setFontSize(29 * CROSSAPP_ADPTATION_RATIO);
        itemText->setTextAlignment(CATextAlignmentCenter);
        itemText->setVerticalTextAlignmet(CAVerticalTextAlignmentCenter);
        itemView->addSubview(itemText);
  
    }
    char pos[20] = "";
    sprintf(pos, "(%d,%d,%d)",section, row, item);
    CALabel* itemText = (CALabel*)p_Cell->getSubviewByTag(99)->getSubviewByTag(100);
    itemText->setText(pos);
  
    return p_Cell;
}

virtual unsigned int collectionViewHeightForRowAtIndexPath(CACollectionView* collectionView, unsigned int section, unsigned int row)

返回值：virtual unsigned int

参数：

解释：cell的高度

virtual unsigned int numberOfItemsInRowsInSection(CACollectionView *collectionView, unsigned int section, unsigned int row)

返回值：virtual unsigned int

参数：

解释：每个cell里的item数量

virtual unsigned int numberOfRowsInSection(CACollectionView *collectionView, unsigned int section)

返回值：virtual unsigned int

参数：

解释：获取对应的section所包含的cell个数

virtual unsigned int numberOfSections(CACollectionView *collectionView)

返回值：virtual unsigned int

参数：

解释：获取tableview包含的section个数

virtual CAView* collectionViewSectionViewForHeaderInSection(CACollectionView *collectionView, const DSize& viewSize, unsigned int section)

返回值：virtual CAView*

参数：

解释：headerView的内容

virtual unsigned int collectionViewHeightForHeaderInSection(CACollectionView *collectionView, unsigned int section)

返回值：virtual unsigned int 

参数：

解释：每个section的headerView

virtual CAView* collectionViewSectionViewForFooterInSection(CACollectionView *collectionView, const DSize& viewSize, unsigned int section)

返回值：virtual CAView*

参数：

解释：footerView的内容

virtual unsigned int collectionViewHeightForFooterInSection(CACollectionView *collectionView, unsigned int section)

返回值：virtual unsigned int

参数：

解释：每个section的footerView

virtual void collectionViewWillDisplayCellAtIndex(CACollectionView* table, CACollectionViewCell* cell, unsigned int section, unsigned int row, unsigned int item) {};

返回值：virtual void

参数：

解释：回调当前将要显示的Collection

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