Change image in UIImageView – RubyMotion

September 8, 2013September 21, 2013 by Tom

I needed to change image in my UIImageView, but simply setting new image using myImageView.setImage didn’t work. There’s simple workaround

@button = UIView.alloc.initWithFrame(frame)
buttonImage = UIImageView.alloc.initWithFrame(@button.bounds)
buttonImage.setTag(1) # set any number you want
buttonImage.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight
@button.addSubview buttonImage

@button = UIView.alloc.initWithFrame(frame)

buttonImage = UIImageView.alloc.initWithFrame(@button.bounds)

buttonImage.setTag(1) # set any number you want

buttonImage.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight

@button.addSubview buttonImage

and now set the image

self.button.viewWithTag(1).setImage(UIImage.imageNamed('answer_bar_white.png').resizableImageWithCapInsets(UIEdgeInsetsMake(18, 18, 18, 18)))

1	self.button.viewWithTag(1).setImage(UIImage.imageNamed('answer_bar_white.png').resizableImageWithCapInsets(UIEdgeInsetsMake(18, 18, 18, 18)))

you can remove resizableImageWithCapInsets – I’m using square images to make UIImageView of any size.

Download file using AFNetwork

April 2, 2013April 2, 2013 by Tom

set your Rakefile

  app.pods do
    pod 'AFNetworking'
    ...
  end

app.pods do

pod 'AFNetworking'

...

end

  def downloadFile(url, file, filesize)
    url = NSURL.URLWithString(url)
    request = NSURLRequest.requestWithURL(url)
    operation = AFHTTPRequestOperation.alloc.initWithRequest(request)
    operation.outputStream = NSOutputStream.outputStreamToFileAtPath(file, append: false)

    unless filesize.nil?
      SVProgressHUD.showProgress(0, status: "Downloading file")
      operation.setDownloadProgressBlock(lambda{|bytesRead, totalBytesRead, totalBytesExpected|
        SVProgressHUD.showProgress((((totalBytesRead/filesize.to_f)*100.0).round)/100.0, status: "Downloading file")
      })
    end

    operation.setCompletionBlockWithSuccess(lambda{|request, response|
      SVProgressHUD.dismiss unless filesize.nil?
    }, failure: lambda{|request, err|
      SVProgressHUD.dismiss unless filesize.nil?

      @alert = UIAlertView.alloc.initWithTitle('Error',
          message: 'Error when downloading data.', delegate: nil, cancelButtonTitle: 'OK',
          otherButtonTitles: nil)
      @alert.show
    })
    operation.start
  end

def downloadFile(url, file, filesize)

url = NSURL.URLWithString(url)

request = NSURLRequest.requestWithURL(url)

operation = AFHTTPRequestOperation.alloc.initWithRequest(request)

operation.outputStream = NSOutputStream.outputStreamToFileAtPath(file, append: false)

unless filesize.nil?

SVProgressHUD.showProgress(0, status: "Downloading file")

operation.setDownloadProgressBlock(lambda{|bytesRead, totalBytesRead, totalBytesExpected|

SVProgressHUD.showProgress((((totalBytesRead/filesize.to_f)*100.0).round)/100.0, status: "Downloading file")

})

end

operation.setCompletionBlockWithSuccess(lambda{|request, response|

SVProgressHUD.dismiss unless filesize.nil?

}, failure: lambda{|request, err|

SVProgressHUD.dismiss unless filesize.nil?

@alert = UIAlertView.alloc.initWithTitle('Error',

message: 'Error when downloading data.', delegate: nil, cancelButtonTitle: 'OK',

otherButtonTitles: nil)

@alert.show

})

operation.start

end

when downloading multiple files, use NSOperationQueue

# change donwloadFile

def downloadFile..
 ...
 operation # was operation.start
end

# change donwloadFile

def downloadFile..

...

operation # was operation.start

end

@queue = NSOperationQueue.alloc.init
@queue.name = "FileDownload"
@queue.maxConcurrentOperationCount = 1   # number of concurrent downloads

@queue.addOperation(downloadFile(url, file, filesize))

@queue = NSOperationQueue.alloc.init

@queue.name = "FileDownload"

@queue.maxConcurrentOperationCount = 1 # number of concurrent downloads

@queue.addOperation(downloadFile(url, file, filesize))

PSTCollectionView in rubymotion

February 20, 2013February 20, 2013 by Tom

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 your Rakefile :

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

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

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

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

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)

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)

end

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

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

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

run rake and voila! :)

PSPDFKit gem for rubymotion

February 20, 2013February 20, 2013 by Tom

I’ve just released simple gem to include PSPDFKit into rubymotion project – see https://rubygems.org/gems/pspdfkit.

Installation is pretty straightforward

add to your Rakefile :

require 'rubygems'
require 'bundler'
Bundler.require

require 'rubygems'

require 'bundler'

Bundler.require

Create Gemfile file and add:

source :rubygems

gem 'pspdfkit'

source :rubygems

gem 'pspdfkit'

and execute bundle install .

Then you need to copy/link framework and bundle files:

mkdir vendor
cd vendor
ln -s ../../pdf/Products/PSPDFKit.embeddedframework/PSPDFKit.framework ./
cd ../resources
ln -s ../../pdf/Products/PSPDFKit.embeddedframework/Resources/PSPDFKit.bundle ./

mkdir vendor

cd vendor

ln -s ../../pdf/Products/PSPDFKit.embeddedframework/PSPDFKit.framework ./

cd ../resources

ln -s ../../pdf/Products/PSPDFKit.embeddedframework/Resources/PSPDFKit.bundle ./

That’s it. Run rake and test your installation.

PSPDFKit in rubymotion

February 16, 2013September 16, 2013 by Tom

Update

If you’re using Bundler, you can simply add gem 'pspdfkit' to your Gemfile. See more on https://github.com/tmeinlschmidt/rm-pspdfkit

As I’ve started using this famous framework, I’d like to use it in my rubymotion application. So, there’s my setup to include this fmw in rubymotion project

extract PSPDFKit anywhere
create directory vendor in your RM project
create symbolic link from your unzipped PSPDFKit to vendor/PSPDFKit.framework

cd vendor
ln -s ../../pdf/Products/PSPDFKit.embeddedframework/PSPDFKit.framework ./
cd ../resources
ln -s ../../pdf/Products/PSPDFKit.embeddedframework/Resources/PSPDFKit.bundle ./

cd vendor

ln -s ../../pdf/Products/PSPDFKit.embeddedframework/PSPDFKit.framework ./

cd ../resources

ln -s ../../pdf/Products/PSPDFKit.embeddedframework/Resources/PSPDFKit.bundle ./

and modify Rakefile accordingly

app.vendor_project('vendor/PSPDFKit.framework', :static, products: ['PSPDFKit'], headers_dir: 'Headers')

app.libs << '/usr/lib/libz.1.1.3.dylib'

app.frameworks += %w(MessageUI AssetsLibrary MediaPlayer PSPDFKit)

app.vendor_project('vendor/PSPDFKit.framework', :static, products: ['PSPDFKit'], headers_dir: 'Headers')

app.libs << '/usr/lib/libz.1.1.3.dylib'

app.frameworks += %w(MessageUI AssetsLibrary MediaPlayer PSPDFKit)

try rake , it should link and start simulator.

Next step

Add some PDF file into your app resources folder.

And then you can try to modify app/app_delegate.rb with simple example:

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)

    documentURL = NSBundle.mainBundle.resourceURL.URLByAppendingPathComponent "DevelopersGuide.pdf"
    @document = PSPDFDocument.PDFDocumentWithURL documentURL

    pdfController = PSPDFViewController.alloc.initWithDocument @document
    navController = UINavigationController.alloc.initWithRootViewController pdfController

    @window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)
    @window.makeKeyAndVisible

    @window.rootViewController = navController
  end
end

class AppDelegate

def application(application, didFinishLaunchingWithOptions:launchOptions)

documentURL = NSBundle.mainBundle.resourceURL.URLByAppendingPathComponent "DevelopersGuide.pdf"

@document = PSPDFDocument.PDFDocumentWithURL documentURL

pdfController = PSPDFViewController.alloc.initWithDocument @document

navController = UINavigationController.alloc.initWithRootViewController pdfController

@window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)

@window.makeKeyAndVisible

@window.rootViewController = navController

end

tom's blog

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Tag: rubymotion

Change image in UIImageView – RubyMotion

Download file using AFNetwork

PSTCollectionView in rubymotion

PSPDFKit gem for rubymotion

PSPDFKit in rubymotion