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RubyMotion Making iOS apps in Ruby

RubyMotion Introduction

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RubyMotion talk by Marc Rendl Ignacio during the October 2012 PHRUG (Philippine Ruby User Group) meetup held at the AELOGICA office.

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Page 1: RubyMotion Introduction

RubyMotionMaking iOS apps in Ruby

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@pd_i

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Prerequisites

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Prerequisites

Ruby MVCObjective-C*

*optional

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What isRubyMotion?

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Ruby toolchain for iOS

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Author:Laurent Sansonetti

(MacRuby)

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1.9compliant

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Objective-C RuntimeFoundation Framework

iOS SDK

Objective-C

Something

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Objective-C RuntimeFoundation Framework

Objective-C

iOS SDK

RubyMotion

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Different...

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...but the same

GaryOldman

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Observations

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RubyMotionObjective-C Objects

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RubyMotion Objects# Ruby"PHRUG".class.ancestors=> [String, Comparable, Object, Kernel, BasicObject]

# RubyMotion"PHRUG".class.ancestors=> [String, NSMutableString, NSString, Comparable, NSObject, Kernel]

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RubyMotion Objects# RubyMotionObject == NSObject=> true

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Objective-CRubyMotion Methods

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RubyMotion Methods# Objective-C / CocoaNSString *string = [[NSString alloc] initWithString:@"PhRuG"];

# RubyMotionstring = NSString.alloc.initWithString "PhRuG"

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RubyMotion Methods# Objective-C / CocoaNSString *string = [[NSString alloc] initWithString:@"PhRuG"];[string uppercaseString] => "PHRUG";# RubyMotionstring = NSString.alloc.initWithString "PhRuG"string.uppercaseString => "PHRUG"

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RubyMotion Methods# Objective-C / CocoaNSString *string = [[NSString alloc] initWithString:@"PhRuG"];[string uppercaseString] => "PHRUG";# RubyMotionstring = NSString.alloc.initWithString "PhRuG"string.uppercaseString => "PHRUG"# we can still use ruby methods!string.upcase => "PHRUG"

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Named Parameters

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Named Parameters# Objective-C, named parameters[string drawAtPoint: point withFont:font]# RubyMotionstring.drawAtPoint(point, withFont:font)# using sendstring

.send(:"drawAtPoint:withFont:", point, font)

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Named Parameters# Objective-C, named parameters[string drawAtPoint: point withFont:font]# RubyMotionstring.drawAtPoint(point, withFont:font)# using sendstring

.send(:"drawAtPoint:withFont:", point, font)

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If they're the

same...

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... why use it?

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Good

Stuff

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Power

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Editor+

Terminal

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Rake

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rake simulator

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rake device

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rake spec

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Testing(MacBacon)

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Garbage Collection

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REPL(read-eval-print loop)

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DSLs(domain specific languages)

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Cocoapods

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Disadvantages

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Disadvantages● Cost

○ $199.99 with 1 year updates○ $99 per year to continue updates

● Most resources are in Objective-C● Not an excuse to not learn Objective-C● No RubyMotion Book (yet)

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Demo Time!

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Questions?

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● rubymotion.com● rubymotion.com/developer-center● slideshare.net/markvilla/macruby-rubymotion-

madridrb-may-2012-13154591● http://www.slideshare.net/clayallsopp/preview-

unicorns-magic-and-better-apps-with-rubymotion [for the Gary Oldman metaphor :) ]

Resources

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Images● http://rubyidentity.org/● http://www.rubymotion.com/press/ ● developer.apple.

com/technologies/mac/cocoa.html● cocoapods.org

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Thanks!

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Marc Ignaciotwitter: @pd_i github: @padi

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