An introduction to RubyMotion

Presentation made at the Bristol Ruby User Group about Rubymotion

Transcript

1. Andrew Nesbitt
   github.com/andrew
   @teabass
   

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2. forwardtechnology.co.uk
   

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5. 410m iOS devices
   As of June 2012
   http://en.wikipedia.org/wiki/IOS
   That is a market that is hard to ignore
   

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6. http://www.textfromxcode.com
   That is a market that is hard to ignore
   

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7. http://macruby.org
   Macruby
   Rubymotion is based on Macruby, which implements ruby natively in the objective c runtime
   Rubymotion has a number of internal differences which allow it to run within the sandboxed
   iOS
   Including memory management code as iOS lacks proper garbage collection
   

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8. twitter.com/lrz
   Laurent Sansonetti
   Build by Laurent Sansonetti, formerly of the iOS team Apple
   Core contributor to Macruby
   Left Apple to be able to release Rubymotion from his new company, Hipbyte
   

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9. £129
   ($199)
   Proprietary software is pretty unusual in the ruby community.
   Concerns about what long term support
   So far so good, lots of regular updates and good customer support
   About the same cost as the iOS Developer Program
   

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10. // Objective C
    - (NSInteger)pickerView:(UIPickerView *)pickerView forComponent:(NSInteger)component {
    ...
    }
    # RubyMotion
    def pickerView(pickerView, titleForRow:row, forComponent:component)
    ...
    end
    Code
    The are quite similar, syntactic sugar aside, except for the static typing
    The main difference between Rubymotion and normal ruby motions are the keyword
    arguments
    

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11. String => NSMutableString => NSString => NSObject
    Integer => Numeric => NSNumber => NSValue => NSObject
    Hash => NSMutableDictionary => NSDictionary => NSObject
    Array => NSMutableArray => NSArray => NSObject
    Symbol => NSString => NSObject
    Time => NSDate => NSObject
    Inheritance
    Ruby classes are implemented on top of their Cocoa equivalents
    

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12. [:!, :!=, :!~, :%, :*, :+, :<, :<<, :<=, :<=>, :==, :===, :=~, :>, :>=, :[], :
    []=, :__id__, :__send__, :ascii_only?, :between?, :bytes, :bytesize, :byteslice, :capitalize, :capitalize!, :casecmp, :center, :chars, :chomp, :chomp!, :chop, :chop!, :chr, :class, :clear, :clone, :codepoints,
    :concat, :count, :crypt, :define_singleton_method, :delete, :delete!, :display, :downcase, :downcase!, :dump, :dup, :each_byte, :each_char, :each_codepoint, :each_line, :empty?, :encode, :encode!,
    :encoding, :end_with?, :enum_for, :eql?, :equal?, :extend, :force_encoding, :freeze, :frozen?, :getbyte, :gsub, :gsub!, :hash, :hex, :include?, :index, :initialize_clone, :initialize_dup, :insert, :inspect,
    :instance_eval, :instance_exec, :instance_of?, :instance_variable_defined?, :instance_variable_get, :instance_variable_set, :instance_variables, :intern, :is_a?, :kind_of?, :length, :lines, :ljust,
    :local_methods, :lstrip, :lstrip!, :match, :method, :methods, :next, :next!, :nil?, :object_id, :oct, :ord, :partition, :prepend, :pretty_inspect, :pretty_print, :pretty_print_cycle, :pretty_print_inspect,
    :pretty_print_instance_variables, :private_methods, :protected_methods, :public_method, :public_methods, :public_send, :replace, :respond_to?, :respond_to_missing?, :reverse, :reverse!, :rindex, :rjust,
    :rpartition, :rstrip, :rstrip!, :scan, :send, :setbyte, :singleton_class, :singleton_methods, :size, :slice, :slice!, :split, :squeeze, :squeeze!, :start_with?, :strip, :strip!, :sub, :sub!, :succ, :succ!, :sum, :swapcase,
    :swapcase!, :taint, :tainted?, :tap, :to_c, :to_enum, :to_f, :to_i, :to_r, :to_s, :to_str, :to_sym, :tr, :tr!, :tr_s, :tr_s!, :trust, :unpack, :untaint, :untrust, :untrusted?, :upcase, :upcase!, :upto, :valid_encoding?]
    "ruby".methods.sort
    Here we can see the methods available on a string in ruby
    including methods for Object, which string inherits from
    

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13. [:!, :"!=:", :"!
    ~:", :"%:", :"*:", :"+:", :"<:", :"<<:", :"<=:", :"<=>:", :"==:", :"===:", :"=~:", :">:", :">=:", :"CA_addValue:multipliedBy:", :CA_copyRenderValue, :"CA_distanceToValue:", :"CA_interpolateValue:byFraction:",
    :"CA_interpolateValues:::interpolator:", :CA_prepareRenderValue, :Complex, :"Complex:", :"LS_hasCaseInsensitivePrefix:", :LS_unescapedQueryValue, :MCAppendDeviceName,
    :MCAppendGreenteaSuffix, :MCSHA256DigestWithSalt, :MCSafeFilenameHash, :"MCSafeFilenameHashWithExtension:", :"MLBindToSQLiteStatement:atPosition:", :MLSortString,
    :MPMediaLibraryDataProviderSystemML3CoercedString, :Rational, :"Rational:", :UTF8String, :[], :"[]:", :
    []=, :"[]=:", :__callee__, :__id__, :__method__, :__send__, :"__send__:", :__type__, :accessibilityActivate, :accessibilityActivationPoint, :"accessibilityArrayOfTextForTextMarkers:",
    :"accessibilityAttributeValue:", :"accessibilityAttributeValue:forParameter:", :"accessibilityBoundsForTextMarkers:", :"accessibilityCandidateWordDescription:", :accessibilityColumnRange,
    :"accessibilityCompareGeometry:", :accessibilityContainer, :accessibilityContainerElements, :"accessibilityContentForLineNumber:", :accessibilityCustomActions, :"accessibilityCustomRotorItemsAtIndex:",
    :accessibilityCustomRotorTitles, :accessibilityDecrement, :"accessibilityEditOperationAction:", :"accessibilityElementAtIndex:", :accessibilityElementCount, :accessibilityElementDidBecomeFocused,
    :accessibilityElementDidLoseFocus, :"accessibilityElementForRow:andColumn:", :accessibilityElementIsFocused, :accessibilityElementsHidden, :"accessibilityEnumerateContainerElementsUsingBlock:",
    :"accessibilityEnumerateContainerElementsWithOptions:usingBlock:", :accessibilityFlowToElements, :accessibilityFrame, :"accessibilityFrameForLineNumber:", :accessibilityHeaderElements,
    :accessibilityHint, :"accessibilityHitTest:", :accessibilityIdentification, :accessibilityIdentifier, :accessibilityIncrement, :accessibilityInvalidStatus, :accessibilityIsComboBox, :accessibilityLabel,
    :"accessibilityLabelForRange:", :accessibilityLanguage, :"accessibilityLineNumberForPoint:", :accessibilityLinkedElement, :accessibilityMathEquation, :accessibilityMathMLSource, :accessibilityMenuActions,
    :accessibilityPageContent, :accessibilityPaths, :"accessibilityPerformAction:withValue:", :"accessibilityPerformCustomAction:", :accessibilityPerformEscape, :accessibilityPerformMagicTap,
    :accessibilityPlaceholderValue, :"accessibilityPostNotification:withObject:afterDelay:", :accessibilityRequired, :accessibilityRootElement, :accessibilityRowRange, :"accessibilityScroll:",
    :accessibilityScrollDownPageSupported, :accessibilityScrollLeftPageSupported, :accessibilityScrollRightPageSupported, :accessibilityScrollUpPageSupported, :accessibilitySecondaryLabel,
    :"accessibilitySetIdentification:", :accessibilityShouldEnumerateContainerElementsArrayDirectly, :accessibilitySpeechHint, :accessibilityStartStopToggle, :"accessibilityStringForTextMarkers:",
    :accessibilityTitleElement, :accessibilityTraits, :accessibilityURL, :accessibilityUserDefinedActivationPoint, :accessibilityUserDefinedFrame, :accessibilityUserDefinedHint,
    :accessibilityUserDefinedIdentifier, :accessibilityUserDefinedIsMainWindow, :accessibilityUserDefinedLabel, :accessibilityUserDefinedLanguage, :accessibilityUserDefinedNotFirstElement,
    :accessibilityUserDefinedServesAsFirstElement, :accessibilityUserDefinedSize, :accessibilityUserDefinedTraits, :accessibilityUserDefinedValue, :accessibilityUserDefinedWindowVisible, :accessibilityValue,
    :accessibilityViewIsModal, :"accessibilityViewWithIdentifier:", :"accessibilityZoomInAtPoint:", :"accessibilityZoomOutAtPoint:", :"addObserver:forKeyPath:options:context:", :allowSafePerformSelector,
    :allowsWeakReference, :"appendCharacters:length:", :"appendFormat:", :"appendString:", :ascii_only?, :autoContentAccessingProxy, :autorelease, :"awakeAfterUsingCoder:", :awakeFromNib,
    :becomeActive, :becomeInactive, :"between?:", :blockingMainThreadProxy, :boolValue, :bytes, :bytesize, :cString, :cStringLength, :"cStringUsingEncoding:", :camelize, :"camelize:",
    :"canBeConvertedToEncoding:", :capitalize, :capitalize!, :capitalizedString, :"capitalizedStringWithLocale:", :"caseInsensitiveCompare:", :"casecmp:", :center, :"center:", :"characterAtIndex:", :chars, :chomp,
    :chomp!, :"chomp!:", :"chomp:", :chop, :chop!, :"chop!:", :"chop:", :chr, :class, :classForArchiver, :classForCoder, :classForKeyedArchiver, :classForPortCoder, :className, :clear, :clone, :codepoints,
    :"commonNonWordBreakingPrefixWithString:options:", :"commonPrefixWithString:options:", :"compare:", :"compare:options:", :"compare:options:range:", :"compare:options:range:locale:",
    :"completePathIntoString:caseSensitive:matchesIntoArray:filterTypes:", :"componentsSeparatedByCharactersInSet:", :"componentsSeparatedByString:", :"concat:", :"conformsToProtocol:",
    :"containsSubstring:", :copy, :"copyUTF8StringOfLength:", :"copyWithZone:", :copyWithoutInsignificantCharacters, :copyWithoutInsignificantPrefixAndCharacters, :count, :"count:",
    :countOfComposedCharacterSequences, :"crypt:", :"cts_boundingRectWithSize:options:attributes:", :"cts_doBoundingRectWithSize:options:attributes:", :"cts_drawAtPoint:withAttributes:",
    :"cts_drawInRect:withAttributes:", :"cts_drawWithRect:options:attributes:", :"cts_sizeWithAttributes:", :cutStringByResolvingAndStandardizingPath, :"dataUsingEncoding:",
    :"dataUsingEncoding:allowLossyConversion:", :"dd_appendSpaces:", :dealloc, :debugDescription, :decimalValue, :decomposedStringWithCanonicalMapping, :decomposedStringWithCompatibilityMapping,
    :defaultAccessibilityTraits, :define_singleton_method, :"define_singleton_method:", :"delayedProxy:", :delete, :delete!, :"delete!:", :"delete:", :"deleteCharactersInRange:", :description,
    :destinationIdIsEmailAddress, :destinationIdIsPhoneNumber, :"dictionaryWithValuesForKeys:", :"didChange:valuesAtIndexes:forKey:", :"didChangeValueForKey:",
    :"didChangeValueForKey:withSetMutation:usingObjects:", :disallowSafePerformSelector, :displayableString, :"displayableStringByStrippingOffCommonPrefixWithString:",
    :"displayableStringByTrimmingPrefixString:", :"doesNotRecognizeSelector:", :doubleValue, :downcase, :downcase!, :"drawAtPoint:forWidth:withAttributes:",
    :"drawAtPoint:forWidth:withFont:fontSize:lineBreakMode:baselineAdjustment:", :"drawAtPoint:forWidth:withFont:fontSize:lineBreakMode:baselineAdjustment:includeEmoji:",
    :"drawAtPoint:forWidth:withFont:lineBreakMode:", :"drawAtPoint:forWidth:withFont:lineBreakMode:letterSpacing:", :"drawAtPoint:forWidth:withFont:lineBreakMode:letterSpacing:includeEmoji:",
    :"drawAtPoint:forWidth:withFont:minFontSize:actualFontSize:lineBreakMode:baselineAdjustment:",
    :"drawAtPoint:forWidth:withFont:minFontSize:actualFontSize:lineBreakMode:baselineAdjustment:includeEmoji:", :"drawAtPoint:withFont:", :"drawInRect:withAttributes:", :"drawInRect:withFont:",
    :"drawInRect:withFont:lineBreakMode:", :"drawInRect:withFont:lineBreakMode:alignment:", :"drawInRect:withFont:lineBreakMode:alignment:lineSpacing:",
    :"drawInRect:withFont:lineBreakMode:alignment:lineSpacing:includeEmoji:", :dump, :dup, :each_byte, :each_char, :each_codepoint, :each_line, :"each_line:", :"editDistanceFrom:", :empty?, :encode,
    :encode!, :"encode!:", :"encode:", :"encodeWithCoder:", :encoding, :end_with?, :"end_with?:", :endsSentence, :endsWord, :enum_for, :"enum_for:", :"enumerateLinesUsingBlock:",
    :"enumerateLinguisticTagsInRange:scheme:options:orthography:usingBlock:", :"enumerateSubstringsInRange:options:usingBlock:", :"eql?:", :"equal?:", :extend, :"extend:", :fastestEncoding,
    :fileSystemRepresentation, :finalize, :floatValue, :"force_encoding:", :formatConfiguration, :"forwardInvocation:", :"forwardingTargetForSelector:", :freeze,
    :"fromMainThreadPostNotificationName:object:userInfo:", :"fromNotifySafeThreadPerformSelector:withObject:", :"fromNotifySafeThreadPostNotificationName:object:userInfo:", :frozen?,
    :"getBytes:maxLength:filledLength:encoding:allowLossyConversion:range:remainingRange:", :"getBytes:maxLength:usedLength:encoding:options:range:remainingRange:", :"getCString:",
    :"getCString:maxLength:", :"getCString:maxLength:encoding:", :"getCString:m
    "iOS".methods.sort
    And here is the methods available on a string in Rubymotion
    These include all Cocoa and Obecjtive C methods inherited from NSString and NSObjectas
    well as ruby’s string methods
    

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14. Things you can’t do
    Kernal.anything
    require ‘foo’
    eval ‘foo’
    Remember it’s not “real” ruby
    

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15. Building and
    Debugging
    Building and running apps is all done on the command line using rake
    Debugging is done with the rubymotion repl, which integrates with the iOS simulator
    A debugger was released a few weeks ago
    

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16. Demo
    http://github.com/andrew/lightning
    

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17. Testing
    http://www.rubymotion.com/developer-center/articles/testing/
    testing using bacon, an rspec clone
    test ran with `rake test`
    

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18. Ship it!
    rake archive generates an .ipa file which can be uploaded to the app store, used for adhoc distribution or sent
    out to testers via testflight
    

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19. Interface Builder
    Can be hooked up to IB nib files and also supports storyboarding for iOS 5 onwards
    

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20. 3rd Party Libraries
    http://rubymotion-wrappers.com
    Rubygems
    CocoaPods
    http://rubymotion-wrappers.com
    

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21. BubbleWrap
    http://bubblewrap.io
    

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22. Notification Center
    Color conversion
    Gestures
    Camera
    Timers
    Audio
    HTTP
    JSON
    

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23. # colour
    '#FF8A19'.to_color
    # => #
    # Notification Center
    @reload_observer = App.notification_center.observe ReloadNotification do |
    notification|
    loadAndRefresh
    end
    # Gestures
    view.whenTapped do
    UIView.animateWithDuration(1,
    animations:lambda {
    # animate
    # @view.transform = ...
    })
    end
    # Camera
    BW::Device.camera.front.picture(media_types: [:movie, :image]) do |result|
    image_view = UIImageView.alloc.initWithImage(result[:original_image])
    end
    # JSON
    BW::JSON.parse "{\"foo\":1,\"bar\":[1,2,3],\"baz\":\"awesome\"}"
    # => {"foo"=>1, "bar"=>[1, 2, 3], "baz"=>"awesome"}
    

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24. In The App Store
    There have been quite a few Rubymotion apps approved on the App store, let’s check out a
    few
    

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25. Cabify
    http://blog.rubymotion.com/post/30514580062/rubymotion-success-story-cabify
    

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26. Ultra Reaction
    http://ultrareaction.sausyn.com
    

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27. Everclip
    http://blog.rubymotion.com/post/27906866028/rubymotion-success-story-everclip
    

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28. Open source
    example apps
    http://github.com/hipByte/RubyMotionSamples
    

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29. Summary
    

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30. Command line driven (no xcode)
    Bring your own editor
    Memory Management
    Interactive Console
    Fast, native apps
    It’s Ruby!
    Pros
    

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31. Not an offical Apple project
    Lacking in documentation
    Still have to learn Cocoa
    Provisioning still a pain
    Proprietary software
    camelCaseMethods
    Cons
    

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32. Playing
    Hacking
    Internal Tools
    Small apps on the store
    Use cases
    Right now it feels risky to invest a lot of time and money into building a large, complex
    rubymotion app
    That being said, we have started building a number of medium size apps within Forward that
    we plan on putting in the App Store
    

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33. MobiRuby
    http://mobiruby.org
    There may soon be an open source alternative
    

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34. Questions?
    

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