WaterFallsFlowLayout

collectionview water falls flow layout

USE IT

      let layout = HCFallsFlowLayout.init()

      //... 设置UIEdgeinset 行间距 列间距 可以自己定义
      //layout.interitemSpacing
      //layout.edgeInset
      //layout.lineSpacing
      layout.basicSetting()
      
      //设置几列 默认是2列
      layout.columCount = 3

      layout.delegate = self

      self.collectionView = UICollectionView.init(frame: self.view.bounds, collectionViewLayout: layout)
      
      //返回每行的行高
      extension HomeViewController: WaterflowLayoutDelegate{
        func collectionView(_ collectionView: UICollectionView, heightForItemAt indexPath: IndexPath) -> CGFloat {
            return CGFloat.random(in: 100...500)
        }    
    }