![file .swiftdeps
## Swift dependencies file v0 ###
provides-top-level:
- "TrackingClientType"
provides-nominal:
- "7Library18TrackingClientTypeP"
provides-member:
- ["7Library18TrackingClientTypeP", ""]
- ["7Library18TrackingClientTypeP", "track"]
provides-dynamic-lookup:
depends-top-level:
- !private "!"
- !private "!="
...
- !private ["13ReactiveSwift14SignalProducerV", "uniqueValues"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "collect"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "concat"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "demoteErrors"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "filter"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "ksr_delay"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "map"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "take"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "uncollect"]
- !private ["13ReactiveSwift22SignalProducerProtocolP", "uniqueValues"]
- !private ["13ReactiveSwift14SignalProtocolP", "combineLatest"]
- !private ["13ReactiveSwift14SignalProtocolP", "filter"]
- !private ["13ReactiveSwift14SignalProtocolP", "flatMap"]
- !private ["13ReactiveSwift14SignalProtocolP", "ignoreValues"]
...](https://image.slidesharecdn.com/cocoaheads-171215154811/85/Live-Updating-Swift-Code-57-320.jpg)
![file .swiftdeps
- "TrackingClientType"
provides-nominal:
- "7Library18TrackingClientTypeP"
provides-member:
- ["7Library18TrackingClientTypeP", ""]
- ["7Library18TrackingClientTypeP", "track"]
provides-dynamic-lookup:
depends-top-level:
- !private "!"
- !private "!="
...
- !private ["13ReactiveSwift14SignalProducerV", "uniqueVal
- !private ["13ReactiveSwift22SignalProducerProtocolP", "c
- !private ["13ReactiveSwift22SignalProducerProtocolP", "c
- !private ["13ReactiveSwift22SignalProducerProtocolP", "d
- !private ["13ReactiveSwift22SignalProducerProtocolP", "f
- !private ["13ReactiveSwift22SignalProducerProtocolP", "k
- !private ["13ReactiveSwift22SignalProducerProtocolP", "m](https://image.slidesharecdn.com/cocoaheads-171215154811/85/Live-Updating-Swift-Code-58-320.jpg)
Live Updating Swift Code
- 2. Senior iOS Developer Bartosz Polaczyk
- 3. Agenda • Demo • How does Injection work? • Swift limitations
- 5. Runtime Live code injection ObjC
- 6. Runtime Live code injection ObjC Injection Bundle
- 7. Runtime Live code injection ObjC Injection Bundle
- 8. Method swizzling let selectorToReplace = #selector(methodName) let originalMethod = class_getInstanceMethod(UIView.self, selectorToReplace) let swizzledMethod = class_getInstanceMethod(OtherClass.self, selectorToReplace) method_exchangeImplementations(originalMethod, swizzledMethod)
- 9. Method swizzling let selectorToReplace = #selector(methodName) let originalMethod = class_getInstanceMethod(UIView.self, selectorTo let swizzledMethod = class_getInstanceMethod(OtherClass.self, select method_exchangeImplementations(originalMethod, swizzledMethod)
- 10. Runtime Live code injection ObjC
- 15. Swift class memory layout class(isa) … … Method 1 Method 2 Method 3 …
- 16. Swift class memory layout class(isa) … … Method 1 Method 2 Method 3 … pushq %rbp movq %rsp, %rbp pushq %r13 subq $0x38, %rsp movq %r12, %rcx movq 0x10(%r13), %rdi movq 0x18(%r13), %rdx movq %rdi, -0x10(%rbp) movq %rdx, %rdi
- 17. Swift class memory layout class(isa) … … Method 1 Method 2 Method 3 … pushq %rbp movq %rsp, %rbp pushq %r13 subq $0x38, %rsp movq %r12, %rcx movq 0x10(%r13), %rdi movq 0x18(%r13), %rdx movq %rdi, -0x10(%rbp) movq %rdx, %rdi pushq %rbp movq %rsp, %rbp pushq %r14 subq $0x38, %rsp movq %r11, %rcx movq 0x10(%r13), %rdi movq 0x18(%r13), %rdx movq %rdi, -0x10(%rbp) movq %rdx, %rdi
- 18. Swift class memory layout class(isa) … … Method 1 Method 2 Method 3 … pushq %rbp movq %rsp, %rbp pushq %r13 subq $0x38, %rsp movq %r12, %rcx movq 0x10(%r13), %rdi movq 0x18(%r13), %rdx movq %rdi, -0x10(%rbp) movq %rdx, %rdi pushq %rbp movq %rsp, %rbp pushq %r14 subq $0x38, %rsp movq %r11, %rcx movq 0x10(%r13), %rdi movq 0x18(%r13), %rdx movq %rdi, -0x10(%rbp) movq %rdx, %rdi
- 19. Swift vtable copy // if swift language class, copy vtable struct _in_objc_class *newclass = (struct _in_objc_class *)INJECTION_BRIDGE(void *)newClass; if ( (uintptr_t)newclass->internal & 0x1 ) { struct _in_objc_class *oldclass = (struct _in_objc_class *)INJECTION_BRIDGE(void *)oldClass; size_t bytes = oldclass->mdsize - offsetof(struct _in_objc_class, dispatch) - 2*sizeof(IMP); memcpy( oldclass->dispatch, newclass->dispatch, bytes ); }
- 20. Swift vtable copy // if swift language class, copy vtable struct _in_objc_class *newclass = (struct _in_ob if ( (uintptr_t)newclass->internal & 0x1 ) { struct _in_objc_class *oldclass = (struct _i size_t bytes = oldclass->mdsize - offsetof(s memcpy( oldclass->dispatch, newclass->dispat }
- 25. InjectionForXcode Swift limitations • classes inherit from NSObject
- 26. InjectionForXcode Swift limitations • classes inherit from NSObject • non-final classes
- 27. InjectionForXcode Swift limitations • classes inherit from NSObject • non-final classes • non-final methods
- 28. InjectionForXcode Swift limitations • classes inherit from NSObject • non-final classes • non-final methods • no structs/enums, no extensions
- 29. InjectionForXcode Swift limitations • classes inherit from NSObject • non-final classes • non-final methods • no structs/enums, no extensions • no global functions
- 30. InjectionForXcode Swift limitations • classes inherit from NSObject • non-final classes • non-final methods • no structs/enums, no extensions • no global functions • no methods/properties added
- 31. but…
- 33. InjectionTDD
- 34. Demo
- 35. InjectionTDD
- 36. InjectionTDD • Live unit tests
- 37. InjectionTDD • Live unit tests • Zero configuration
- 38. InjectionTDD • Live unit tests • Zero configuration • CocoaPods or .framework integration
- 39. InjectionTDD • Live unit tests • Zero configuration • CocoaPods or .framework integration • Standard Xcode interface
- 40. InjectionTDD • Live unit tests • Zero configuration • CocoaPods or .framework integration • Standard Xcode interface • Swift only
- 54. class struct
- 56. file .swiftdeps
- 57. file .swiftdeps ## Swift dependencies file v0 ### provides-top-level: - "TrackingClientType" provides-nominal: - "7Library18TrackingClientTypeP" provides-member: - ["7Library18TrackingClientTypeP", ""] - ["7Library18TrackingClientTypeP", "track"] provides-dynamic-lookup: depends-top-level: - !private "!" - !private "!=" ... - !private ["13ReactiveSwift14SignalProducerV", "uniqueValues"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "collect"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "concat"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "demoteErrors"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "filter"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "ksr_delay"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "map"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "take"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "uncollect"] - !private ["13ReactiveSwift22SignalProducerProtocolP", "uniqueValues"] - !private ["13ReactiveSwift14SignalProtocolP", "combineLatest"] - !private ["13ReactiveSwift14SignalProtocolP", "filter"] - !private ["13ReactiveSwift14SignalProtocolP", "flatMap"] - !private ["13ReactiveSwift14SignalProtocolP", "ignoreValues"] ...
- 58. file .swiftdeps - "TrackingClientType" provides-nominal: - "7Library18TrackingClientTypeP" provides-member: - ["7Library18TrackingClientTypeP", ""] - ["7Library18TrackingClientTypeP", "track"] provides-dynamic-lookup: depends-top-level: - !private "!" - !private "!=" ... - !private ["13ReactiveSwift14SignalProducerV", "uniqueVal - !private ["13ReactiveSwift22SignalProducerProtocolP", "c - !private ["13ReactiveSwift22SignalProducerProtocolP", "c - !private ["13ReactiveSwift22SignalProducerProtocolP", "d - !private ["13ReactiveSwift22SignalProducerProtocolP", "f - !private ["13ReactiveSwift22SignalProducerProtocolP", "k - !private ["13ReactiveSwift22SignalProducerProtocolP", "m
- 60. InjectionTDD limitations • No Objective-C
- 61. InjectionTDD limitations • No Objective-C • No static libraries used
- 62. InjectionTDD limitations • No Objective-C • No static libraries used • Host application
- 63. InjectionTDD limitations • No Objective-C • No static libraries used • Host application • ⌘+U, if new file added
- 64. Installation • Download Injection For Xcode with TDD • correct xcode-select -p • Integrate InjectionTDD to your project • e.g. pod 'InjectionTDD', '~> 0.4’ • ⌘+U
- 66. Optionally: install Xcode breakpoints curl https://codeload.github.com/polac24/InjectionTDD/tar.gz/master | tar -xz --strip=3 InjectionTDD-master/scripts/update_breakpoints_source/ ./update_breakpoints_source.sh
- 67. Summary • Injection For Xcode for UI • InjectionTDD for unit tests • tests on ⌘+S • Swift • minimal configuration • standard Xcode interface
- 68. References • InjectionTDD: https://github.com/polac24/InjectionTDD • Download Injection: http://johnholdsworth.com/ injection.html • Method Dispatch in Swift: https://www.raizlabs.com/dev/ 2016/12/swift-method-dispatch/ • Exploring Swift Memory Layout • Mike Ash: https:// www.youtube.com/watch?v=ERYNyrfXjlg
- 69. Q&A