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
今ならAmazon ECSのサービス間通信をどう選ぶか / Selection of ECS Interservice Communication 2025
tkikuc
21
4k
NPOでのDevinの活用
codeforeveryone
0
830
ニーリーにおけるプロダクトエンジニア
nealle
0
830
すべてのコンテキストを、 ユーザー価値に変える
applism118
3
1.3k
Azure AI Foundryではじめてのマルチエージェントワークフロー
seosoft
0
170
GitHub Copilot and GitHub Codespaces Hands-on
ymd65536
2
150
なぜ適用するか、移行して理解するClean Architecture 〜構造を超えて設計を継承する〜 / Why Apply, Migrate and Understand Clean Architecture - Inherit Design Beyond Structure
seike460
PRO
3
760
#QiitaBash MCPのセキュリティ
ryosukedtomita
1
1.3k
技術同人誌をMCP Serverにしてみた
74th
1
640
AI駆動のマルチエージェントによる業務フロー自動化の設計と実践
h_okkah
0
150
Discover Metal 4
rei315
2
130
Hypervel - A Coroutine Framework for Laravel Artisans
albertcht
1
120
Featured
See All Featured
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
107
19k
Building an army of robots
kneath
306
45k
YesSQL, Process and Tooling at Scale
rocio
173
14k
4 Signs Your Business is Dying
shpigford
184
22k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
10
950
Site-Speed That Sticks
csswizardry
10
690
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Writing Fast Ruby
sferik
628
62k
Practical Orchestrator
shlominoach
189
11k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
45
7.5k
Rebuilding a faster, lazier Slack
samanthasiow
82
9.1k
Unsuck your backbone
ammeep
671
58k
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?