Motion-Kit UICollectionViewCell

gistfile1.rb

class MyLayout < MK::Layout

  def layout
    super.tap do
      collection_layout                         = UICollectionViewFlowLayout.new
      collection_layout.scrollDirection         = UICollectionViewScrollDirectionHorizontal
      collection_layout.minimumLineSpacing      = 0
      collection_layout.minimumInteritemSpacing = 0

      collection = UICollectionView.alloc.initWithFrame(CGRectZero, collectionViewLayout: collection_layout)
      add collection, :collection do
        background_color :clear.uicolor

        constraints do
          x.is 10
          y.is 40
          width.equals(:superview).minus(20)
          height.equals(:superview).minus(45)
        end
      end
    end
  end
end

class MyCell < UICollectionViewCell
  #def initWithStyle(style, reuseIdentifier: identifier)
  def initWithFrame(frame)
    super.tap do
      @layout = MyCellLayout.new(root: self)
      @layout.build
    end
  end
end

class MyCellLayout < MK::Layout
  def layout
    content_view do
      background_color :red.uicolor

      add UIView, :subview do
        background_color :green.uicolor

        constraints do
          size.equals(:superview).times(0.9)
          center.equals(:superview)
        end
      end
    end
  end
end

class MyController < UIViewController

  KSectionCount = 6
  KLinesCount = 10

  def viewDidLoad
    @layout = MyLayout.new(root: self.view)
    @layout.build

    @collection            = @layout.get(:collection)
    @collection.registerClass(MyCell, forCellWithReuseIdentifier: 'identifier')
    @collection.delegate   = self
    @collection.dataSource = self
  end

  def numberOfSectionsInCollectionView(collection_view)
    KSectionCount
  end

  def collectionView(collection_view, numberOfItemsInSection: section)
    KLinesCount
  end

  def collectionView(collection_view, cellForItemAtIndexPath: index_path)
    cell = collection_view.dequeueReusableCellWithReuseIdentifier('identifier', forIndexPath: index_path)
    
    #cell.contentView.backgroundColor = [(100...200).to_a.sample, (100...200).to_a.sample, (100...200).to_a.sample].uicolor
    
    cell
  end

  def collectionView(collectionView, layout: collectionViewLayout, sizeForItemAtIndexPath: indexPath)
    frame = @collection.frame

    width  = (CGRectGetWidth(frame) / KSectionCount).floor
    height = (CGRectGetHeight(frame) / KLinesCount).floor

    row = indexPath.row
    if row > 0 and (row / (KSectionCount - 1).to_f).floor == row / (KSectionCount - 1).to_f
      width = CGRectGetWidth(frame) - ((KSectionCount - 1) * width)
    end

    if indexPath.section == (KLinesCount - 1)
      height = CGRectGetHeight(frame) - (height * (KLinesCount - 1))
    end
    
    [width, height]
  end
end

AHHH OF course. And that's why it worked for me in a UITableView