Developing Cocoa Applications with macRuby

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MacRuby presentation at MagicRuby 2011 in Orlando, Florida on February 5, 2011.

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Developing Cocoa Applications with macRuby

  1. 1. Developing Cocoa Applications With MacRuby Brendan G. Lim @brendanlim brendan@intridea.comSaturday, February 5, 2011
  2. 2. Outline • Objective-C & Cocoa • RubyCocoa • MacRuby • Live Coding • HotCocoaSaturday, February 5, 2011
  3. 3. Objective -C • Object-oriented extensions to C • Strongly typed • Like Ruby, influenced by Smalltalk • Primarily used for Mac OS X and iOSSaturday, February 5, 2011
  4. 4. Cocoa • High-level API for Mac OS X • Set of frameworks • Includes FoundationKit, AppKit, etc. • Apps typically built using tools like XCode and Interface BuilderSaturday, February 5, 2011
  5. 5. Why make desktop apps?Saturday, February 5, 2011
  6. 6. Different ParadigmSaturday, February 5, 2011
  7. 7. Mac App Store 1. Build MacRuby application 2. Submit to App Store 4. ProfitSaturday, February 5, 2011
  8. 8. Why Ruby instead of Objective-C?Saturday, February 5, 2011
  9. 9. Apple Loves Ruby 2002 Mac OS X 10.2 Ruby 1.6.7 2005 Mac OS X 10.4 Ruby 1.8.2 2007 Mac OS X 10.5 Ruby 1.8.6 RubyCocoa, RubyGems, Rails 2009 Mac OS X 10.6 Ruby 1.8.7 RubyCocoa, RubyGems, Rails 2011 Mac OS X 10.7 Ruby 1.9.x? MacRuby? RubyCocoa, RubyGems, RailsSaturday, February 5, 2011
  10. 10. Ruby vs Objective-C object.method(param) = [object method:param];Saturday, February 5, 2011
  11. 11. Ruby vs Objective-C array = [] = NSMutableArray *array = [[NSMutableArray alloc] init];Saturday, February 5, 2011
  12. 12. Ruby vs Objective-C “ string”.strip = [@“ string” stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]Saturday, February 5, 2011
  13. 13. Ruby vs Objective-C dictionary = {“key1” => “value1”, “key2” => “value2”} = NSArray *keys = [NSArray arrayWithObjects:@”key1”,@”key2”]; NSArray *data = [NSArray arrayWithObjects:@”value1”,@”value2”]; NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];Saturday, February 5, 2011
  14. 14. +Saturday, February 5, 2011
  15. 15. RubyCocoa • Bridge between Objective-C and Ruby • Manipulate Objective-C objects using Ruby • Write Cocoa apps in Ruby • Runs on Ruby 1.8 • Ships with OSX LeopardSaturday, February 5, 2011
  16. 16. RubyCocoa vs Objective-C OSX::NSNotificationCenter.defaultCenter.addObserver_selector_name_object( self, :window_moved, "NSWindowDidMoveNotification", nil ) = [[NSNotificationCenter defaultCenter] addObserver:self, selector:@selector(windowMoved:) name:”NSWindowDidMoveNotification” object:nil];Saturday, February 5, 2011
  17. 17. So, Why Not RubyCocoa? (besides it looking gross)Saturday, February 5, 2011
  18. 18. Why Not RubyCocoa? • It’s a bridge! • Two runtimes, GCs, etc. • Object conversions • Syntax doesn’t feel like idiomatic Ruby • It’s getting replacedSaturday, February 5, 2011
  19. 19. +Saturday, February 5, 2011
  20. 20. MacRuby • Implementation of Ruby 1.9 that runs on top the Objective-C runtime • Open sourced and supported by Apple • Replacing RubyCocoa • Objects are peers with no translation layerSaturday, February 5, 2011
  21. 21. MacRuby Object NSObject String NSMutableString Number NSNumber Array NSMutableArray Hash NSMutableDictionarySaturday, February 5, 2011
  22. 22. MacRuby Objects Objective-C Classes Objective-C Methods Objective-CSaturday, February 5, 2011
  23. 23. MacRuby >> s = “magicruby” => “magicruby” >> s.class => String >> s.class.ancestors => [String,NSMutableString,NSString,Comparable,NSObject,Kernel] >> s.upcase => “MAGICRUBY” >> s.uppercaseString => “MAGICRUBY”Saturday, February 5, 2011
  24. 24. MacRuby >> NSString.new(“magicruby”) => “magicruby” >> NSString.stringWithString(“magicruby”) => “magicruby” >> NSString.alloc.initWithString(“magicruby”) => “magicruby”Saturday, February 5, 2011
  25. 25. MacRuby >> a = [] => [] >> a.class => Array >> a.class.ancestors => [Array,NSMutableArray,NSArray,Enumerable,NSObject,Kernel] >> a << “MagicRuby” => [“MagicRuby”]Saturday, February 5, 2011
  26. 26. MacRuby vs Objective-C -(id) tableView:(NSTableView *)tableView objectValueForColumn:(NSTableColumn *)column row:(int)rowIndex { .. }Saturday, February 5, 2011
  27. 27. MacRuby vs Objective-C -(id) tableView:(NSTableView *)tableView objectValueForColumn:(NSTableColumn *)column row:(int)rowIndex { .. } def tableView(tableView objectValueForColumn:column row:rowIndex) endSaturday, February 5, 2011
  28. 28. MacRuby vs Objective-C Interface Builder Outlets & Actions !Saturday, February 5, 2011
  29. 29. MacRuby vs Objective-C Interface Builder Outlets # Interface NSString *myString; @property(nonatomic,retain) IBOutlet NSString *myString; = attr_accessor :myStringSaturday, February 5, 2011
  30. 30. MacRuby vs Objective-C Interface Builder Actions # Implementation -(IBAction) myAction:(id)sender { ... } = def myAction(sender) ... endSaturday, February 5, 2011
  31. 31. MacRuby - Gem Support • sudo macgem install awesome_gem • Not all gems supported right nowSaturday, February 5, 2011
  32. 32. MacRuby - Objective-C Frameworks & Libraries • Libraries must have garbage collection support • Libraries must be turned into bundles • Frameworks can easily be includedSaturday, February 5, 2011
  33. 33. Testing MacRuby • Any Ruby testing framework instantly becomes an Objective-C testing framework • Test::Unit • RSpec • etc...Saturday, February 5, 2011
  34. 34. What tools will we be using?Saturday, February 5, 2011
  35. 35. XcodeSaturday, February 5, 2011
  36. 36. Interface BuilderSaturday, February 5, 2011
  37. 37. InstrumentsSaturday, February 5, 2011
  38. 38. Let’s build a MacRuby appSaturday, February 5, 2011
  39. 39. HotCocoa • Created by Rich Kilmer • Ruby layer that sits on top of Cocoa, etc. • Use Ruby to easily create user interfaces • Used to be included with MacRuby • Now available as a gemSaturday, February 5, 2011
  40. 40. HotCocoa win = NSWindow.alloc.initWithContentRect([10,20,300,300], styleMask: (NSTitleWindowMask | NSCloseableWindowMask | NSMiniatureizableWindowMask | NSResizeableWindowMask) = win = window :frame => [10,20,300,300]Saturday, February 5, 2011
  41. 41. HotCocoa sudo macgem install hotcocoa hotcocoa NAME_OF_APPSaturday, February 5, 2011
  42. 42. Hello World in HotCocoa require ‘hotcocoa’ class Application include HotCocoa def start application :name => "Hello" do |app| app.delegate = self window :frame => [500,500,200,100], :title => "Hello" do |win| win << label(:text => "Hello World",:layout => {:start => false}) win.will_close { exit } end end end end Application.new.startSaturday, February 5, 2011
  43. 43. Questions? MacRuby in Action http://manning.com/lim http://macruby.org http://bit.ly/macruby-getting-started http://bit.ly/macruby-examples http://bit.ly/tdd-macrubySaturday, February 5, 2011

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