I need use UICollectionView, but target my app for iOS < 6.0. So I’ve found PSTCollectionView library and using it with my rubymotion project. You can find whole source code in my github repo.

You need to download and link PSTCollectionView directory into vendor/PSTCollectionView .

Then update yourRakefile :

app.vendor_project('vendor/PSTCollectionView', :static)
app.frameworks += %w(QuartzCore UIKit)
app.deployment_target = "5.0"
app.device_family = [:ipad]

create app/controllers  and add two files – cell.rb  and view_controller.rb

cell.rb

class Cell < PSTCollectionViewCell #PSUICollectionViewCell

  attr_accessor :label

  def initWithFrame(frame)
    if super
      @label = UILabel.alloc.initWithFrame(CGRectMake(0.0, 0.0, frame.size.width, frame.size.height))

      @label.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth
      @label.textAlignment = UITextAlignmentCenter
      @label.font = UIFont.boldSystemFontOfSize(50.0)
      @label.backgroundColor = UIColor.underPageBackgroundColor
      @label.textColor = UIColor.whiteColor
      self.contentView.addSubview(@label)
    end
    self
  end

end

and view_controller.rb

class ViewController < PSTCollectionViewController #PSUICollectionViewController

  def viewDidLoad
    super
    pinchRecognizer = UIPinchGestureRecognizer.alloc.initWithTarget(self, action:'handlePinchGesture')
    self.collectionView.addGestureRecognizer(pinchRecognizer)
    self.collectionView.registerClass(Cell, forCellWithReuseIdentifier: "MY_CELL")
  end

  def collectionView(view, numberOfItemsInSection: section)
    63
  end

  def collectionView(collectionView, cellForItemAtIndexPath: indexPath)
    cell = collectionView.dequeueReusableCellWithReuseIdentifier("MY_CELL", forIndexPath:indexPath)
    cell.label.text = 'test'
    cell
  end

  def collectionView(collectionView, layout: collectionViewLayout, sizeForItemAtIndexPath:indexPath)
    CGSizeMake(120, 120)
  end

  def collectionView(collectionView, layout: collectionViewLayout, minimumInteritemSpacingForSectionAtIndex: section)
    30
  end

  def collectionView(collectionView, layout:collectionViewLayout, minimumLineSpacingForSectionAtIndex: section)
    30
  end

end

Finally, change app_delegate.rb

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    @window = UIWindow.alloc.initWithFrame UIScreen.mainScreen.bounds
    view_controller = ViewController.alloc.initWithCollectionViewLayout(PSTCollectionViewFlowLayout.new)
    @window.rootViewController = view_controller
    @window.makeKeyAndVisible
    true
  end
end

runrake  and voila! :)