Use RubyMotion

Transcript

1. Use RubyMotion Brent Hargrave @brenthargrave Lower Manhattan iOS Meetup April 10, 2013 Tuesday, May 21, 13
2. What is RubyMotion? Tuesday, May 21, 13
3. What is RubyMotion? Terminal-based toolchain for writing native iOS apps in Ruby Tuesday, May 21, 13
4. Awesome... so what? Tuesday, May 21, 13
5. Awesome... so what? Write apps faster, with fewer bugs, than in Xcode / Obj-C Tuesday, May 21, 13
6. How? Tuesday, May 21, 13
7. How? •Language: more expressive Tuesday, May 21, 13
8. How? •Language: more expressive •Configuration: not in Xcode Tuesday, May 21, 13
9. How? •Language: more expressive •Configuration: not in Xcode •Editor: is not Xcode Tuesday, May 21, 13
10. How? •Language: more expressive •Configuration: not in Xcode •Editor: is not Xcode •Testing: baked-in Tuesday, May 21, 13
11. Ruby •No header files! •No #import statements! •Terse syntax Tuesday, May 21, 13
12. AFNetworking NSURLRequest *request = [NSURLRequest requestWithURL:url]; AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) { // handle success } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) { // handle failure }]; [operation start]; in Objective-C Tuesday, May 21, 13
13. AFNetworking request = NSURLRequest.requestWithURL url operation = AFJSONRequestOperation.JSONRequestOperationWithRequest request, success: lambda { |request, response, id| # handle success }, failure: lambda { |request, response, error, id| # handle failure } operation.start straight Ruby port Tuesday, May 21, 13
14. AFNetworking AFMotion::Operation::JSON.get("request/path") do |result| if result.success? # handle success elsif result.failure? # handle failure end end “authentic” Ruby port Tuesday, May 21, 13
15. Ugh, Ruby performance? •RubyMotion’s Ruby != MRI •Compiled, not interpreted •Ruby => AST => LLVM IR => machine code Tuesday, May 21, 13
16. Ruby in Objective-C Runtime Tuesday, May 21, 13
17. Ruby inherits from Obj-C # kinda/sorta what's happening class String < NSString #... end rb_string = "foo" rb_string.methods.include? "capitalizedString" #=> true Tuesday, May 21, 13
18. OK, so it’s fast. What about memory? Tuesday, May 21, 13
19. OK, so it’s fast. What about memory? ARC-like reference counting, not garbage collected. Tuesday, May 21, 13
20. Configuration: Rake, not Xcode # -*- coding: utf-8 -*- $:.unshift("/Library/RubyMotion/lib") require 'motion/project' Motion::Project::App.setup do |app| # Use `rake config' to see complete project settings. app.name = 'sample_app' end Tuesday, May 21, 13
21. Builds: Rake, not Xcode Tuesday, May 21, 13
22. Editor: [anything], not Xcode •Vim •Emacs •TextMate •Notepad? Tuesday, May 21, 13
23. Editor: [anything], not Xcode •Eliminates faux vs. *actual* source structure conflicts Tuesday, May 21, 13
24. Xcode is dead, long live Xcode! Tuesday, May 21, 13
25. RubyMotion & Xcode •Xcode artifacts can be used in RM •Storyboards •CoreData models Tuesday, May 21, 13
26. RubyMotion & Xcode Motion::Project::App.setup do |app| # ... app.pods do pod "RestKit" pod "AFNetworking" end end Tuesday, May 21, 13
27. RubyMotion & Xcode •Obj-C inside RM •RM in Xcode/Obj-C Tuesday, May 21, 13
28. But... Tuesday, May 21, 13
29. Apple.can_ban? RubyMotion #=> true Tuesday, May 21, 13
30. RubyMotion.profiler.exists? #=> false Tuesday, May 21, 13
31. RubyMotion.open_source? #=> false Tuesday, May 21, 13
32. RubyGems •Share RM code using gems •But few existing gems work! •No “eval” or “require” Tuesday, May 21, 13
33. Smug Hipsters Tuesday, May 21, 13
34. Keep an eye on it. Tuesday, May 21, 13
35. Next great mobile startup? Tuesday, May 21, 13
36. Next great iOS library? Tuesday, May 21, 13
37. Questions? Tuesday, May 21, 13
38. Questions? •@brenthargrave •http://brent.is •github.com/jamescallmebrent Tuesday, May 21, 13