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waterfallmultisectionflowlayout's Introduction

WaterfallMultiSectionFlowLayout

基于 UICollectionViewFlowLayout 实现,支持多 section 场景下瀑布流、线性排列、九宫格样式,纯 swift 实现。

使用方法

1. 初始化

let layout = WaterfallMutiSectionFlowLayout()
layout.delegate = self
let collection = UICollectionView(frame: self.view.bounds, collectionViewLayout: layout)

2. 代理实现

2.1 必须实现代理方法

/// collectionItem高度
func heightForRowAtIndexPath(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, indexPath: IndexPath, itemWidth: CGFloat) -> CGFloat

2.2 可选实现代理方法

  /// 每个section 列数(默认2列)
  @objc optional func columnNumber(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> Int
  
  /// header高度(默认为0)
  @objc optional func referenceSizeForHeader(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> CGSize
  
  /// footer高度(默认为0)
  @objc optional func referenceSizeForFooter(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> CGSize
  
  /// 每个section 边距(默认为0)
  @objc optional func insetForSection(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> UIEdgeInsets
  
  /// 每个section item上下间距(默认为0)
  @objc optional func lineSpacing(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> CGFloat
  
  /// 每个section item左右间距(默认为0)
  @objc optional func interitemSpacing(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> CGFloat
  
  /// section头部header与上个section尾部footer间距(默认为0)
  @objc optional func spacingWithLastSection(collectionView collection: UICollectionView, layout: WaterfallMutiSectionFlowLayout, section: Int) -> CGFloat

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