Simplify your life: build apps from reusable libraries

Transcript

1. Simplify your life: build apps from reusable libraries
2. Julia Vashchenko C++ macOS developer
3. –Steve McConnell, 'Code Complete' “Managing complexity is the most important technical topic in software development.”
7. Versus Quiz
8. Versus Quiz
9. Library Framework
11. Inversion of Control Conceptual difference Martin Fowler on Frameworks and Inversion of Control:
16. FRAMEWORK CONTROLS YOU
17. Library Framework Technical difference
18. Library Framework Technical difference
19. Explicit Dependencies in Xcode Implicit
20. Explicit Dependencies
21. Implicit Dependencies
22. Static Dynamic libraries
23. Static Dynamic
24. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows
25. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows
26. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary
27. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary
28. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger
29. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller
30. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower
31. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster
32. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time
33. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time at run time
34. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time at run time Library Update Mechanism rebuild host application
35. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time at run time Library Update Mechanism rebuild host application updates separately
36. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time at run time Library Update Mechanism rebuild host application updates separately Usage in Playgrounds can't be used
37. Static Dynamic File extension .a on Linux, macOS, iOS .lib on Windows .dylib on macOS, iOS .so on Linux .dll on Windows Compilation INTO binary OUTSIDE the binary Binary Size bigger smaller Application Load Time slower faster Binding Symbols at link time at run time Library Update Mechanism rebuild host application updates separately Usage in Playgrounds can't be used is used
39. LLVM Clang
40. compiler backend compiler frontend LLVM Clang
41. C, C++, Objective-C, Objective-C++ LLVM Clang
42. ActionScript, Ada, C, C#, C++, Common Lisp, Crystal, CUDA, D, Delphi, Fortran, Graphical G Programming Language, Halide, Haskell, Java bytecode, Julia, Kotlin, Lua, Objective-C, OpenGL Shading Language, Pony, Python, R, Ruby, Rust, Scala, Swift, Xojo LLVM Clang C, C++, Objective-C, Objective-C++
43. ActionScript, Ada, C, C#, C++, Common Lisp, Crystal, CUDA, D, Delphi, Fortran, Graphical G Programming Language, Halide, Haskell, Java bytecode, Julia, Kotlin, Lua, Objective-C, OpenGL Shading Language, Pony, Python, R, Ruby, Rust, Scala, Swift, Xojo LLVM Clang C, C++, Objective-C, Objective-C++
44. Compiling Linking
45. Compiling Linking +
46. Compiling Linking + Headers ↓
47. Compiling Linking + Headers Object files ↓ ↓
48. #include #import @import
49. Modules
50. What languages support modules?
51. C++ Ada Julia Swift JavaScript Objective-C Python IBM/360 Assembler Perl C# Haskell Ruby Pascal Turbo Pascal Clojure Java
52. C++ Ada Julia Swift JavaScript Objective-C Python IBM/360 Assembler Perl C# Haskell Ruby Pascal Turbo Pascal Clojure Java
53. C++ Ada Julia Swift JavaScript Objective-C Python IBM/360 Assembler Perl C# Haskell Ruby Pascal Turbo Pascal Clojure Java
54. Swift module Clang module
55. Swift module Clang module
56. Swift module Clang module
57. How to manage lib updates
58. How to manage lib updates • do not manage
59. How to manage lib updates • do not manage • via Swift Package Manager: depend on private repo
60. How to manage lib updates • do not manage • via Swift Package Manager: depend on private repo • via CocoaPods: Private Pod
61. How to manage lib updates • do not manage • via Swift Package Manager: depend on private repo • via CocoaPods: Private or Local Pod • via Git Submodule
62. Swift Package Manager Using GitHub Deploy Key Package.swift: Type in Terminal:
63. Swift Package Manager Using GitHub Deploy Key Config file contents: GitHub.com → Your Profile → Repositories → Settings → Deploy Keys → Add deploy key → paste public key → check ‘Allow write access’
64. CocoaPods Using Private&Local Pods
65. CocoaPods Using Private&Local Pods 17:30 Modularizing your iOS apps
66. Git Submodules
67. Git Submodules
68. Building Swift module in Xcode
69. Building Swift module in Xcode
70. Building Swift module without Xcode
71. Building Swift module without Xcode
72. Demo: Making & Using a Framework
73. Troubleshooting common problems
74. Error type Check: Compilation error HEADER_SEARCH_PATHS Xcode doesn’t build subproject Implicit Dependencies in ‘Schemes’ should be checked Linker error 1. Is there a function with exact name? 2. Is is implemented? Xcode can’t find a built library LIBRARIES_SEARCH_PATHS Static library doesn’t work for simulator Use lipo tool to add missing architecture
75. Thank you jula.vashchenko@yahoo.com