iOS实现3D卡片式轮播效果

/**
 * 当前显示cell的Size(中间页显示大小)
 *
 * @param flowView <#flowView description#>
 *
 * @return <#return value description#>
 */
- (CGSize)sizeForPageInFlowView:(HQFlowView *)flowView;

/**
 * 滚动到了某一列
 *
 * @param pageNumber <#pageNumber description#>
 * @param flowView <#flowView description#>
 */
- (void)didScrollToPage:(NSInteger)pageNumber inFlowView:(HQFlowView *)flowView;

/**
 * 点击了第几个cell
 *
 * @param subView 点击的控件
 * @param subIndex 点击控件的index
 *
 * @return <#return value description#>
 */
- (void)didSelectCell:(HQIndexBannerSubview *)subView withSubViewIndex:(NSInteger)subIndex;

/**
 * 返回显示View的个数
 *
 * @param flowView <#flowView description#>
 *
 * @return <#return value description#>
 */
- (NSInteger)numberOfPagesInFlowView:(HQFlowView *)flowView;

/**
 * 给某一列设置属性
 *
 * @param flowView <#flowView description#>
 * @param index <#index description#>
 *
 * @return <#return value description#>
 */
- (HQIndexBannerSubview *)flowView:(HQFlowView *)flowView cellForPageAtIndex:(NSInteger)index;