RubyMotion Introduction

RubyMotionMaking iOS apps in Ruby

@pd_i

Prerequisites

Prerequisites

Ruby MVCObjective-C*

*optional

What isRubyMotion?

Ruby toolchain for iOS

Author:Laurent Sansonetti

(MacRuby)

1.9compliant

Objective-C RuntimeFoundation Framework

iOS SDK

Objective-C

Something

Objective-C RuntimeFoundation Framework

Objective-C

iOS SDK

RubyMotion

Different...

...but the same

GaryOldman

Observations

RubyMotionObjective-C Objects

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

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

RubyMotion Objects# RubyMotionObject == NSObject=> true

Objective-CRubyMotion Methods

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

# RubyMotionstring = NSString.alloc.initWithString "PhRuG"

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

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"

Named Parameters

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

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

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

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

If they're the

same...

... why use it?

Good

Stuff

Power

Editor+

Terminal

Rake

rake simulator

rake device

rake spec

Testing(MacBacon)

Garbage Collection

REPL(read-eval-print loop)

DSLs(domain specific languages)

Cocoapods

Disadvantages

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)

Demo Time!

Questions?

● 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

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

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

Thanks!

Marc Ignaciotwitter: @pd_i github: @padi