學習 WWDC2019

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WWDC 蘋果全球軟件開發者年會 2019 早已結束了，我大概從六月三日份開始學習，主要時間是從七月開始幾乎每天看數級，花了大約將近兩個月的時間觀看和學習蘋果公佈的所有視頻。

下面是我學習觀看的所有視頻（注，下面的格式為：title session platforms）：


App Store and Distribution

1. Accessibility Inspector 257 iOS, macOS
2. Accessibility in SwiftUI 238 iOS, macOS
3. All About Notarization 703 macOS
4. App Distribution – From Ad-hoc to Enterprise 304 iOS, macOS, tvOS, watchOS
5. Creating an Accessible Reading Experience 248 iOS
6. In-App Purchases and Using Server-to-Server Notifications 302 iOS, macOS, tvOS, watchOS
7. Large Content Viewer- Ensuring Readability for Everyone 261 iOS
8. Making Apps More Accessible With Custom Actions 250 iOS, macOS
9. Subscription Offers Best Practices 305 iOS, macOS, tvOS
10. Visual Design and Accessibility 244 iOS, macOS
11. What's New in App Store Connect 301 iOS, macOS, tvOS, watchOS
12. Writing Great Accessibility Labels 254 iOS, macOS

Developer Tools

1. Adopting Swift Packages in Xcode 408 iOS, macOS, tvOS, watchOS
2. Adopting Swift Packages in Xcode 707 iOS, macOS, tvOS, watchOS
3. Binary Frameworks in Swift 416 iOS, macOS, tvOS, watchOS
4. Core ML 3 Framework 704 iOS, macOS, tvOS, watchOS
5. Creating Swift Packages 410 iOS, macOS, tvOS, watchOS
6. Debugging in Xcode 11 412 iOS, macOS, tvOS, watchOS
7. Designing for Adverse Network and Temperature Conditions 422 iOS
8. Developing a Great Profiling Experience 414 iOS, macOS, tvOS, watchOS
9. Getting Started with Instruments 411 iOS, macOS, tvOS, watchOS
10. Getting Started with Xcode 404 iOS, macOS, tvOS, watchOS
11. Improving Battery Life and Performance 417 iOS, macOS, tvOS, watchOS
12. Introducing Accelerate for Swift 718 iOS, marOS, tvOS, watchOS
13. Introducing SF Symbols 206 iOS, tvOS, watchOS
14. Introducing the Create ML App 430 iOS, macOS, tvOS, watchOS
15. LLDB: Beyond "po" 429 iOS, macOS, tvOS, watchOS
16. Mastering Xcode Previews 233 iOS, macOS, tvOS, watchOS
17. Modeling in Custom Instruments 421 iOS, macOS, tvOS, watchOS
18. Modern Swift API Design 415 iOS, macOS, tvOS, watchOS
19. Optimizing App Launch 423 iOS, tvOS
20. Optimizing Storage in Your App 419 iOS, macOS, tvOS, watchOS
21. Swift Playgrounds 3 405 iOS macOS
22. Testing in Xcode 413 iOS, macOS, tvOS, watchOS
23. What's New in Clang and LLVM 409 iOS, macOS, tvOS, watchOS
24. What's New in Machine Learning 209 iOS, macOS, tvOS, watchOS
25. What's New in Swift 402 iOS, macOS, tvOS, watchOS
26. What's New in Xcode 11 401 iOS, macOS, tvOS, watchOS

Featured

1. Apple Design Awards 104 iOS, macOS, tvOS, watchOS
2. Keynote 101 iOS, macOS, tvOS, watchOS
3. Platforms State of the Union 103 iOS, macOS, tvOS, watchOS

Frameworks

1. Adding Indoor Maps to your App and Website 241 iOS, macOS, tvOS, watchOS
2. Advances in CarPlay Systems 252 iOS
3. Advances in Collection View Layout 215 iOS, macOS, tvOS
4. Advances in Foundation 723 iOS, macOS, tvOS, watchOS
5. Advances in Natural Language Framework 232 iOS, macOS, tvOS, watchOS
6. Advances in Networking, Part 1 712 iOS, macOS, tvOS, watchOS
7. Advances in Networking, Part 2 713 iOS, macOS, tvOS, watchOS
8. Advances in Speech Recognition 256 iOS, macOS
9. Advances in UI Data Sources 220 iOS, macOS, tvOS
10. Advances in macOS Security 701 macOS
11. Architecting Your App for Multiple Windows 258 iOS
12. Auditing Web Content with Web Inspector 514 iOS, macOS
13. Building Activity Classification Models in Create ML 426 iOS, macOS, watchOS
14. Building Custom Views with SwiftUI 237 iOS
15. Designing Great Shortcuts 806 iOS, watchOS
16. Designing for Privacy 708 iOS, macOS, tvOS, watchOS
17. Designing iPad Apps for Mac 809 iOS, macOS
18. Drawing Classification and One-Shot Object Detection in Turi Create 420 iOS, macOS, tvOS, watchOS
19. Embedding and Sharing Visually Rich Links 262 iOS, watchOS
20. Exploring New Data Representations in HealthKit 218 iOS, watchOS
21. Exploring Tinted Graphic Complications 253 watchOS
22. Extended Runtime for watchOS Apps 251 watchOS
23. Font Management and Text Scaling 227 iOS
24. Great Developer Habits 239 iOS, macOS, tvOS, watchOS
25. Implementing Dark Mode on iOS 214 IOS
26. Integrating SwiftUI 231 iOS, macOS, tvOS, watchOS
27. Integrating with Siri Event Suggestions 243 iOS
28. Introducing Combine 722 iOS, macOS, tvOS, watchOS
29. Introducing Desktop-class Browsing on iPad 203 iOS
30. Introducing Multiple Windows on iPad 212 iOS
31. Introducing Parameters for Shortcuts 213 iOS, watchOS
32. Introducing PencilKit 221 iOS
33. Introducing Sign In with Apple 706 iOS, macOS, tvOS, watchOS
34. Introducing SwiftUI: Building Your First App 204 iOS, macOS, tvOS, watchOS
35. Introducing iPad Apps for Mac 205 iOS, macOS
36. Introducing the Indoor Maps Program 245 iOS, macOS, tvOS, watchOS
37. Making Apps with Core Data 230 iOS. macOS, tvOS, watchOS
38. Mastering the Living Room With tvOS 211 tvOS
39. Modernizing Your UI for iOS 13 224 iOS
40. Network Extensions for the Modern Mac 714 macOS
41. ResearchKit and CareKit Reimagined 217 iOS, watchOS
42. Supporting Dark Mode in Your Web Content 511 iOS
43. Supporting New Game Controllers 616 iOS, macOS, tvOS
44. SwiftUI Essentials 216 iOS, macOS, tvOS, watchOS
45. SwiftUI On All Devices 240 iOS, macOS, tvOS, watchOS
46. SwiftUI on watchOS 219 watchOS
47. System Extensions and DriverKit 702 macOS
48. Taking iPad Apps for Mac to the Next Level 235 iOS, macOS
49. Targeting Content with Multiple Windows 259 iOS
50. Text Recognition in Vision Framework 234 iOS, macOS
51. Training Object Detection Models in Create ML 424 iOS, macOS, tvOS
52. Training Sound Classification Models in Create ML 425 iOS, macOS
53. Training Text Classifiers in Create ML 428 iOS, macOS
54. Understanding CPU Usage with Web Inspector 513 iOS, macOS
55. Using Core Data With CloudKit 202 iOS, macOS, tvOS, watchOS
56. What's New for Web Developers 518 iOS, macOS, watchOS
57. What's New in Apple File Systems 710 iOS, macOS, tvOS, watchOS
58. What's New in Authentication 516 iOS, macOS, tvOS, watchOS
59. What's New in Core Bluetooth 901 iOS, macOS, tvOS, watchOS
60. What's New in Core Location 705 iOS, macOS, tvOS, watchOS
61. What's New in Safari 515 iOS, macOS
62. What's New in Safari Extensions 720 macOS
63. What's New in Universal Links 717 iOS, macOS
64. What's New in iOS Design 808 iOS
65. What’s New in AppKit for macOS 210 iOS, macOS
66. What’s New in ClassKit 247 iOS
67. What’s New in File Management and Quick Look 247 iOS
68. What’s New in File Management and Quick Look 719 iOS, macOS
69. What’s New in Managing Apple Devices 303 iOS, macOS, tvOS, watchOS
70. What’s New in MapKit and MapKit JS 236 iOS, macOS, tvOS, watchOS
71. Window Management in Your Multitasking App 246 iOS

Graphics and Games

1. Advances in AR Quick Look 612 iOS
2. Bringing OpenGL Apps to Metal 611 iOS, macOS, tvOS
3. Bringing People into AR 607 iOS
4. Building AR Experiences with Reality Composer 609 iOS, macOS
5. Building Apps with RealityKit 605 iOS, macOS
6. Building Collaborative AR Experiences 610 iOS
7. Creating Great Apps Using Core ML and ARKit 228 iOS, macOS, tvOS, watchOS
8. Delivering Optimized Metal Apps and Games 606 iOS, tvOS
9. Game Center Player Identifiers 615 iOS, macOS, tvOS, watchOS
10. Getting the Most Out of Simulator 418 iOS, tvOS, watchOS
11. Introducing ARKit 3 604 iOS
12. Introducing RealityKit and Reality Composer 603 iOS, macOS
13. Metal for Machine Learning 614 iOS, macOS
14. Metal for Pro Apps 608 iOS, macOS
15. Modern Rendering with Metal 601 iOS, macOS, tvOS
16. Ray Tracing with Metal 613 macOS
17. Working with USD 602 iOS macOS tvOS

Media

1. Advances in AR Quick Look 612 iOS
2. Bringing OpenGL Apps to Metal 611 iOS, macOS, tvOS
3. Bringing People into AR 607 iOS
4. Building AR Experiences with Reality Composer 609 iOS, macOS
5. Building Apps with RealityKit 605 iOS, macOS
6. Building Collaborative AR Experiences 610 iOS
7. Creating Great Apps Using Core ML and ARKit 228 iOS, macOS, tvOS, watchOS
8. Delivering Optimized Metal Apps and Games 606 iOS, tvOS
9. Game Center Player Identifiers 615 iOS, macOS, tvOS, watchOS
10. Getting the Most Out of Simulator 418 iOS, tvOS, watchOS
11. Introducing ARKit 3 604 iOS
12. Introducing RealityKit and Reality Composer 603 iOS, macOS
13. Metal for Machine Learning 614 iOS, macOS
14. Metal for Pro Apps 608 iOS, macOS
15. Modern Rendering with Metal 601 iOS, macOS, tvOS
16. Ray Tracing with Metal 613 macOS
17. Working with USD 602 iOS macOS tvOS

App Store Connect

1. App Analytics Metrics 103
2. App Analytics Overview 102
3. App Analytics Retention 104
4. App Store Connect Basics 105
5. TestFlight 101

Insights

1. App Store Product Page 110
2. Bringing CARROT Weather to Apple Watch 7
3. Building a Brand on Social Media 6
4. Building a Business in the Kids Category 2
5. Creating A Great Commerce Experience 4
6. Localizing Evernote for Japan 8

參考

• Apple Developer: WWDC 2019 Videos

居家清洁的一个小窍门

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最近看了YouTube视频上【兔妈妈的厨房日记】，其中一期中我看见她用金属丝清洁金属上的黑斑，于是在评论中分享了我多年发现的一个清洁小窍门。我记不得是什么时候开始的，已经有多年了吧，记得好像是清理刷墙工具时偶然发现的这个小工具，效果非常好。下面是我的评论，写的非常详细，不必多补充了。

看來兔媽媽是非常愛清潔的。看見你用金屬刷，我這裡分享一個小工具。在Home Depot or Rona家居各種的材料店的刷牆或木工的工具區，尋找一種刷油漆的海綿工具(sanding sponge)，表面上有一層砂紙，注意尋找的砂紙是布質的材料，這樣的非常結實，在水中浸泡之後，十分耐用，砂子不容易脫落。有些砂紙真是紙質的底料，紙在水中用時間不久就容易被洗掉。

砂紙有各種不同尺寸的，根據自己需要選擇不同的，粗的用來清理非常難清潔的厚黑斑，細的用於輕微的黑斑，還有非常微細的砂。這種海綿砂紙用來清洗金屬表面黑斑特別有效，背後的海綿吸收不少水分和清潔劑，用起來非常好用。

最初擦洗時不要用力太大，不然鋒利的砂子會擦傷表面，因此要輕輕地擦。用久了之後，一些砂子會脫落，但用起來更好用。自從我用這種工具，清除金屬表面的各種黑斑再也不是難事了，而且一塊用幾乎一年的時間。而金屬絲工具很容易斷，不僅不怎麼經用，而且斷碎的金屬絲非常惱人的。

對了，這種海綿砂紙非常便宜，才幾塊錢，不過選用稍貴和耐用的為好。

参考

• 这是一种砂纸的图像


• 視頻

第一个iOS app 的里程碑

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根據Apple 2017年在全球開發者年會上的數據，蘋果公司通過App Store出售的app，已經給app開發者支付了一千億美元。



2019新年之際，我開發的iOS app，既TapToCount-3W（點擊計數-3W），也第一次收到了Apple的分享！雖然這個數字很小，但也是一個良好徵兆的開端，這也是我自成為iOS app開發者以來的一個非常有意義的里程碑。目前我的app使用者分佈的國家地區有：加拿大，美國，中國和台灣，這些用戶中有我的好朋友，老同學，還有眾多素不相識的用戶。

在此特向app的使用者表示衷心地感謝！

通過我設計開發的app，能夠給app用戶的工作和生活帶來他們所期望和喜愛的價值，這是一件非常有意義的事情。曾記得，喬布斯曾對App Store推出的最初成果十分驚喜和感慨，廣大開發者所推出的iOS app，讓許多用戶的生活發生了感動人心的改變，並給他們帶來了新的價值。對此，喬布斯曾十分真誠地感謝全球開發者所作出的努力。

我也從此立志要成為其中一員，用我的技能和才智也作出一份微小的奉獻，為普通人的生活帶來方便，增添樂趣，擁有美好的回憶。我一直堅持努力，到現在取得了初步成果，我的app開發技能也有大大地提高，對此，我感到非常地自豪和驕傲，並希望通過更多的普通使用者來實現我的願望。

我已經為我的第一個app發展制定了發展藍圖，新的一年將會有更多的改進，更多新增的功能，iOS app的擁有者只需一次性支付微小費用，不僅擁有app，並持續免費得到不斷提升和新增的功能。我也希望我熟知的朋友，能夠利用於我便利交流的機會，不斷提出寶貴的改進意見或更新的建議。

也期望，新的app將會早日推出。

參考

• App: TapToCount-3W
• 英文博客：TapToCount-3W
• 中文博客：點擊計數-3W