Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Implement beautiful DSL for iOS using Ruby
Search
Francis Chong
April 26, 2014
Programming
2
750
Implement beautiful DSL for iOS using Ruby
At RubyConf Taiwan 2014 #ruby #rubyconftw
Francis Chong
April 26, 2014
Tweet
Share
More Decks by Francis Chong
See All by Francis Chong
Migrate to Swift 3
siuying
0
200
CocoaPods - A better way to use and publish open source project for Objective-C
siuying
2
360
Legco OpenData
siuying
0
130
EverClip - Evernote DEVCUP Meetup 2013 Hong Kong
siuying
0
91
iOS Development with Ruby using RubyMotion
siuying
1
180
Other Decks in Programming
See All in Programming
datadog dash 2025 LLM observability for reliability and stability
ivry_presentationmaterials
0
460
Composerが「依存解決」のためにどんな工夫をしているか #phpcon
o0h
PRO
1
250
「Cursor/Devin全社導入の理想と現実」のその後
saitoryc
0
770
dbt民主化とLLMによる開発ブースト ~ AI Readyな分析サイクルを目指して ~
yoshyum
3
800
AI時代のソフトウェア開発を考える(2025/07版) / Agentic Software Engineering Findy 2025-07 Edition
twada
PRO
68
21k
なぜ「共通化」を考え、失敗を繰り返すのか
rinchoku
1
640
AIエージェントはこう育てる - GitHub Copilot Agentとチームの共進化サイクル
koboriakira
0
510
iOS 26にアップデートすると実機でのHot Reloadができない?
umigishiaoi
0
120
新メンバーも今日から大活躍!SREが支えるスケールし続ける組織のオンボーディング
honmarkhunt
3
6k
Deep Dive into ~/.claude/projects
hiragram
12
2.4k
ソフトウェア品質を数字で捉える技術。事業成長を支えるシステム品質の マネジメント
takuya542
1
11k
Rubyでやりたい駆動開発 / Ruby driven development
chobishiba
1
650
Featured
See All Featured
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.1k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
How STYLIGHT went responsive
nonsquared
100
5.6k
VelocityConf: Rendering Performance Case Studies
addyosmani
332
24k
Side Projects
sachag
455
42k
Making the Leap to Tech Lead
cromwellryan
134
9.4k
Adopting Sorbet at Scale
ufuk
77
9.4k
RailsConf 2023
tenderlove
30
1.1k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.4k
Done Done
chrislema
184
16k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
2.9k
Transcript
Implement beautiful DSL for iOS using Ruby Francis Chong
About me
鍾振輝 Francis Chong @siuying
Indie Mobile Dev
Why DSL?
https://github.com/tzangms/iloveck101 “I love ck101.com” ! “… I just want the
pictures. But their site is slow, filled with ads and noise … ” @tzangms 海總理
None
None
People found this is a good idea!
• Go • https://github.com/wuman/go-ck101 • https://github.com/lazywei/iloveck101 • Ruby • https://github.com/wancw/iloveck101
• https://github.com/shunwen/iloveck101 • PHP • https://github.com/fukuball/iloveck101 • Objective-C • https://github.com/saiday/hornyfolks • https://github.com/siuying/iloveck101 • Node.js • https://github.com/clonn/iloveck101 • Groovy • https://github.com/tangblack/ groovy_ILoveCK101 • Racket • https://github.com/Domon/iloveck101 • JavaScript • https://github.com/poying/iloveck101 • GreaseMonekey • https://github.com/tomin/iloveck101
I made an iOS version too …
Can we generalize it?
Convert web sites into reusable data.
None
None
Goals • Keep existing code and tools • Add dynamic
behavior to a static app • Interact with native code • Simple to read and write
DSL
Domain Specific Language
–Martin Fowler “DSLs are small languages, focused on a particular
aspect of a software system.”
External & Internal DSL
How to implement DSL for iOS
Internal DSL with Objective-C / RubyMotion
Masonry https://github.com/cloudkite/Masonry
Moria https://github.com/siuying/moria
Kiwi https://github.com/allending/Kiwi
Parser generator like Bison, CoreParse or PEGKit
NUI https://github.com/tombenner/nui
mruby
objc-mruby example
JavaScriptCore
iOS 7.0
Bi-directional Bridge http://blog.bignerdranch.com/3784-javascriptcore-and-ios-7/
None
… but this is a Ruby conference?
Opal
Ruby to JavaScript Compiler http://opalrb.org/try/
Output
JavaScriptCore + Opal
Expose Native Classes to JS
Opal Wrapper for JS
Example
Goal: Convert web sites into reusable data.
Designing the DSL
1. Write an imaginary DSL
2. Make it valid
3. Make it work
4. Add more use case
Everything
http://cl.ly/3Y1y0N3y2J1V
Now we’ve supported one site
Let’s add more!
None
http://cl.ly/0R0k0t1x2v2r
Users could change the code themselves
Add sites without recompile
Practical Tips
JavaScriptCoreOpalAdditions
Compile Opal in Runtime
IGJavaScriptConsole
Interactive Console
Rake and sprockets
Gemfile
Rakefile
Integrate the project into Xcode
Custom Build Phase
Add build task to project
Pros and Cons
Based on features in iOS SDK
Dynamic behavior
Interaction with native code.
Easy to read and write.
One more layer of indirection.
–App Store Review Guidelines “Apps that download code in any
way or form will be rejected.”
Readings
http://www.duokan.com/book/43469
http://www.amazon.com/gp/product/0321712943
Question?