Highlights of WWDC 2018 & Hacking Marzipan

The world's biggest gathering of iOS developers organized by Apple is happening just a few days before mDevCamp. Peter will be there and will bring all the hot news we should look at in upcoming weeks and months. The talk featured a first in-depth look at the experience of porting http://pdfviewer.io over to Apple's new iOSMac subsystem ("Marzipan"). Video of PDF Viewer running on macOS: https://twitter.com/steipete/status/1006292370160316418

Transcript

1. Highlights of WWDC 2018 Peter Steinberger - @steipete
2. Highlights of WWDC 2018 » WWDC 2018 » Talk Highlights » Marzipan Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
3. What's New for Developers » Swift 4.2 » Xcode 10 » ARKit 2 & USDZ » Network.framework » Siri Shortcuts » Core ML (Mac) Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
4. "Bug fixes and performance improvements." Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
5. iOS 13 Predictions » Application Tabs » Split Screen/Multple Windows » New Home Screen » Pinnable Widgets » ... Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
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48. Great Talks Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
49. Understanding Crashes and Crash Logs (414) https://developer.apple.com/videos/play/wwdc2018/414/
50. A Tour of UICollectionView (225) https://developer.apple.com/videos/play/wwdc2018/225/
51. Embracing Algorithms (223) https://developer.apple.com/videos/play/wwdc2018/223/
52. Advanced Debugging with Xcode and LLDB https://developer.apple.com/videos/play/wwdc2018/412/
53. Marzipan Hacking Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
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62. DISCLAIMER » Things will break » Don't release Marzipan apps just yet » Don't try any of that on your main dev machine » Disabling security is a bad idea » I only had a few days to play with it Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
63. Why bother then? » Get a headstart for 2019 » It will make your codebase better » It's fun! Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
64. https://github.com/biscuitehh/MarzipanPlatter
65. Disable Security ! sudo csrutil disable sudo nvram boot-args=“amfi_get_out_of_my_way=0x1” Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
66. Virtual Machines do not work currently Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
67. What's already there? » Both Swift and Objective-C are supported » Storyboards/Interface Builder layouts mostly work » Most Frameworks are available » MobileCoreServices: Renamed to CoreServices (new in macOS Mojave) Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
68. Problems » Some parts from iOS 11 are missing » Deprecated API is gone (UIWebView is not there) » Auto Layout behaves different » Stuff's weird & undocumented » WINDOW SERVER FREEZES CONSTANTLY Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
69. AppKit is still there and will haunt you Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
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74. @interface UILabel (PSPDFMarzipan) // Otherwise we get an unrecognized selector - (NSUInteger)ns_widgetType; @end @implementation UILabel (PSPDFMarzipan) - (NSUInteger)ns_widgetType { return 0; } @end @interface UITextField (PSPDFMarzipan) // Otherwise we get an unrecognized selector - (NSUInteger)ns_widgetType; @end @implementation UITextField (PSPDFMarzipan) - (NSUInteger)ns_widgetType { return 0; } @end Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
75. Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
76. @interface UILabel (PSPDFMarzipan) // Otherwise we get an unrecognized selector - (NSUInteger)ns_widgetType; @end @implementation UILabel (PSPDFMarzipan) - (NSUInteger)ns_widgetType { return 1; } @end Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
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85. UIStackView system spacing - (void)setPspdf_fallbackSpacing:(CGFloat)fallbackSpacing { if (@available(iOS 11.0, *)) { self.spacing = UIStackViewSpacingUseSystem; } else { self.spacing = fallbackSpacing; } } Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
86. UIStackView system spacing yolo - (void)setPspdf_fallbackSpacing:(CGFloat)fallbackSpacing { //if (@available(iOS 11.0, *)) { // self.spacing = UIStackViewSpacingUseSystem; //} else { self.spacing = fallbackSpacing; //} } Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
87. Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
88. Auto Layout Gotchas » Don't use visual format language (fails to match views) » Don't use UIStackViewSpacingUseSystem (introduced in iOS 11) » Some wilder hacks required (ns_widgetType) Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
89. Window Chrome » No API Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
90. Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018
92. pdfviewer.io
93. Thanks! Try pdfviewer.io (iOS and Android, no macOS yet, sorry) Want more like that? Follow @steipete on Twitter Peter Steinberger - @steipete - PSPDFKit - Highlights of WWDC 2018