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How to not get sand in your eyes when using pla...

How to not get sand in your eyes when using playgrounds

Felipe Espinoza

March 20, 2018
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  1. How to not get sand in your eyes when using

    playgrounds by Felipe Espinoza @fespinoza @fespinozacast
  2. The problem with iOS development Navigate to the right screen

    Test Launch Simulator Build Code t +∞
  3. Clear boundaries • For this particular screen: • what dependencies

    do i need? • what app context does it need? • what objects are called inside? • how should i invoke this view controller?
  4. Quick testing device + traits Language Right to left Left

    to right Dynamic Type Layout Direction Kickstarter Playground Helpers
  5. Other reasons • complex gestures to be tested • presence

    of strong side effects • the effort of adopting them • etc
  6. 1. create a new framework target 2. add pods to

    the new target 3. create playground 4. add playground to the workspace 5. add helper files to playground 6. build the framework 7. profit Creating a framework
  7. Conclusions • it requires a bit of work but forces

    you to write less effect dependent code • increases velocity of iteration and can be used within your project • easier test of different traits combinations => better support for them • there is a way to go regarding Xcode playground’s stability
  8. Resources • Playground Driven Development Talk by @mbrandronw • Everyone

    is an API designer by @johnsundell • Adding playgrounds to your Xcode Project by @onmyway133 • How to playground • Kickstarter's playground helpers • Point free's testing helpers • @johnsundell's playground script
  9. error: module compiled with Swift 4.0 cannot be imported in

    Swift 4.0.3 Problem Solution Clear derived data
  10. Problem Playground execution failed: error: Couldn't lookup symbols: __T013PeilFramework13VGServiceViewCACSC6CGRectV5frame_tcfC __T013PeilFramework13VGServiceViewCMa

    Solution use_frameworks! target 'DateToolsPlayground' do pod 'DateTools' end post_install do |installer| installer.pods_project.targets.each do |target| target.build_configurations.each do |config| config.build_settings['CONFIGURATION_BUILD_DIR'] = '$PODS_CONFIGURATION_BUILD_DIR' end end end https://github.com/CocoaPods/CocoaPods/issues/5334#issuecomment-223444937
  11. Problem error: Playground execution aborted: error: Execution was interrupted, reason:

    EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0). The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation. Solution There is an unhandled NSError to fix