Journey to Swift

A Talk that I gave at the Developer User group Johannesburg

Transcript

1. Journey to Swift
   Peter-John Welcome
   google.com/+PeterJohnWelcome
   

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2. Objective C
   Was born in 1984
   Old school C style language (header files)
   

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3. Swift
   Was born in 2014
   Modern, beautiful, magical language
   

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4. The Journey
   ● Moving from Monolithic app to having frameworks (pods)
   ● Reduces compilation times due to incremental builds
   ● decouple your code, helps with Unit tests
   

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5. The Journey
   ● Interoperability - bridging
   ● Big objective C code base (so you would want to reuse some of that code)
   

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6. Code
   The Journey
   

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7. The Journey
   Disadvantages to Interoperability
   ● Developers need to know 2 languages
   ● Xcode is buggy ( refactoring , debugging , Code completion)
   ● Swift is a Static dispatcher - no reflection =(
   ● Swift embedded Libraries (app bloat)
   ● 3rd Party library problems
   ● Code Standards
   ● AppCode did not have great support
   

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8. The Journey
   The Journey
   Advantages to Interoperability/Swift
   ● Less boilerplate code
   ● Functions are 1st class citizens
   ● Functional programming paradigm
   ● Protocol Oriented Programming
   

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9. ● Generics
   ● Tuples
   ● Enumerations defined in Swift without Int raw value type
   ● Structures defined in Swift
   ● Top-level functions defined in Swift
   ● Global variables defined in Swift
   ● Typealiases defined in Swift
   ● Swift-style variadics
   ● Nested types
   ● Curried functions
   The Journey
   Swift Types
   

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10. The Journey
    ● https://medium.com/standard-bank/getting-swift-3-compatibility-in-a-large-objective-c-codebase-7ac
    9f0bc81b5
    ● https://medium.com/google-developers/migrating-from-objective-c-to-swift-googlecast-reference-app
    -81030ce814ce
    ● https://www.skilled.io/u/keithsmiley/tales-of-a-rewrite-at-lyft
    Resources
    

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11. Advice
    The Journey
    

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12. Thanks!
    Contact me:
    google.com/u/0/+PeterJohnWelcome
    @pjapplez
    pjwelcome@gmail.com
    Peter-johnwelcome.co.za
    https://github.com/pjwelcome
    

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