protocol PageFlowViewDelegate : NSObjectProtocol{
 func sizeForPageInFlowView(flowView : PageFlowView) -> CGSize
 /// 滾動到了某一列
 func didScrollToPage(pageNumber : Int,inFlowView flowView : PageFlowView)
 
 /// 點擊了第幾個cell
 ///
 /// - Parameters:
 /// - subView: 點擊的控件
 /// - subIndex: 點擊控件的index
 func didSelectCell(subView : IndexBannerSubiew,subViewIndex subIndex : Int)
}

protocol PageFlowViewDataSource : NSObjectProtocol{
 /// 返回顯示View的個數(shù)
 func numberOfPagesInFlowView(flowView : PageFlowView) -> Int
 
 /// 給某一列設(shè)置屬性
 ///
 /// - Parameters:
 /// - flowView: <#flowView description#>
 /// - index: <#index description#>
 /// - Returns: <#return value description#>
 func cellForPageAtIndex(flowView : PageFlowView,atIndex index : Int) -> IndexBannerSubiew
}

// 模擬器原因,底部會有殘影,真機測試沒有
let pageFlowView = PageFlowView.init(frame: CGRect.init(x: 0, y: 72, width: kScreenW, height: kScreenW*9/16))
pageFlowView.backgroundColor = UIColor.white

pageFlowView.delegate = self
pageFlowView.dataSource = self
pageFlowView.minimumPageAlpha = 0.1
pageFlowView.isCarousel = true
pageFlowView.orientation = .vertical
pageFlowView.isOpenAutoScroll = true

//初始化pageControl
let pageControl = UIPageControl.init(frame: CGRect.init(x: 0, y: pageFlowView.bounds.height-32, width: kScreenW, height: 8))
pageFlowView.pageControl = pageControl
pageFlowView.addSubview(pageControl)
pageFlowView.reloadData()
view.addSubview(pageFlowView)