13的話

提醒一下 WWDC 就快到了。就算你沒有空參加，也要留點時間把第一天 Keynote、State of the Union 兩場看完。

很多人不知道這兩場的差別，前者其實是對媒體與大眾，介紹一些新功能、新名詞。後者才重點針對開發者，把新技術、新的 API 列出來，這樣你就知道接下來要追哪些 sessions。

（看前一期 · 回首頁）

🍴WWDC21 網站圖片玄機

是 Eat, Sleep, Code 的意思嗎？

Jane Manchun Wong @wongmjane

WWDC 2021 products: 🍴 Apple Fork and Knife 😴 Apple Sleep 💻 MacBook developer.apple.com/wwdc21/

4:12 PM ∙ May 24, 2021

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1,352Likes171Retweets

💡WWDC21 Digital Lounges

今年多了直接跟 Apple 工程師的線上聊天室。6/1 開始免費註冊，人數有上限請把握機會。

🆕What’s New in Swift 5.5

覺得最近太閒、想預習 WWDC 的話可以先讀。先說，這網頁印成 A4 至少也要 25 頁。我把標題跟作者的相關推文列一下：

• Async/await

Paul Hudson @twostraws

Async/await functions allow us to run complex asynchronous code almost is if it were synchronous. It doesn't make them concurrent – that's a separate change! – but it does make for beautifully clean API.

4:44 PM ∙ May 28, 2021

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136Likes12Retweets

• Async/await: sequences

• Effectful read-only properties

Paul Hudson @twostraws

Last but not least, read-only properties can now be marked using async and/or throws, making them much more at home in Swift 5.5's asynchronous world.

4:53 PM ∙ May 28, 2021

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70Likes6Retweets

• Structured concurrency

Paul Hudson @twostraws

Structured concurrency lets us create tasks and task groups to execute work concurrently, wait for it to complete, or cancel it as needed.

4:46 PM ∙ May 28, 2021

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57Likes3Retweets

• async let bindings

Paul Hudson @twostraws

Async let bindings allow us to create concurrent tasks easily, then wait for all them to complete later on. The tasks start running immediately, making this really lightweight syntax.

4:45 PM ∙ May 28, 2021

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93Likes11Retweets

• Continuations for interfacing async tasks with synchronous code

• Actors

Paul Hudson @twostraws

Actors are like classes that are designed to be safe to use in concurrent environments, because Swift automatically ensures their mutable state is only ever accessed by a single thread at any given time. 👋 Race conditions!

4:48 PM ∙ May 28, 2021

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88Likes8Retweets

• Global actors

Paul Hudson @twostraws

@ MainActor lets us ensure that a function or property is used only on the main thread. Swift will automatically queue up any work to happen there, as if we had used DispatchQueue.main ourselves.

4:49 PM ∙ May 28, 2021

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102Likes6Retweets

• Sendable and @Sendable closures

• #if for postfix member expressions

Paul Hudson @twostraws

"#if for postfix member expressions" sounds obscure, but if you know you know – and you'll be really glad this one has landed.

4:50 PM ∙ May 28, 2021

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144Likes16Retweets

• Allow interchangeable use of CGFloat and Double types

Paul Hudson @twostraws

The Swift compiler can now implicitly insert initializers to convert between CGFloat and Double, which is going to make many APIs (not least SwiftUI) so much nicer!

4:51 PM ∙ May 28, 2021

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200Likes26Retweets

• Codable synthesis for enums with associated values

Paul Hudson @twostraws

Swift 5.5 sees another welcome upgrade for Codable: it now supports enums with associated values!

4:52 PM ∙ May 28, 2021

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301Likes38Retweets

• lazy now works in local contexts

• Extend property wrappers to function and closure parameters

• Extending static member lookup in generic contexts

• And there’s still more…

☠️M1RACLES 漏洞

Apple Silicon M1 硬體層面的漏洞。實際上沒有那麼嚴重，不過這個網站的 FAQ 寫得很有趣，不怕英文的可以讀一下。

🫓iMac 有多薄

比 iPhone 一代還薄。

Kate @whoiskatrin

something to think about

3:47 PM ∙ May 28, 2021

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12,868Likes3,285Retweets

順便跟大家說一下，iMac（不算腳架）的體積只比 Mac mini 多 17.5%。

13 @ethanhuang13

🖥睡前突然想來算 iMac M1 的體積。官方沒給不含支架的高，故用寬推算。總共是： 54.7 × 26.1 × 1.15 ≈ 1642 cm³ 相較之下，Mac mini： 19.7 × 19.7 × 3.6 ≈ 1397 cm³ iMac 竟然只比 Mac mini 多 17.5% 而已 當然 M1 小體積王者是 iPad Pro 11 吋 24.76 × 17.85 × 0.59 ≈ 261 cm³ #買都買 #來睡

5:43 PM ∙ May 25, 2021

🤪Random Tweets

論用 Twitter 學技術：

龙爪槐守望者 @ftium4

我来推特想学技术，所以关注了很多独立开发者。结果熊猫吃短信的开发者在迷恋小护士；落格输入法的作者在转黄图；pastenow开发者在探咖啡店，技术屁也没学到，黄图倒是攒了一堆😂

3:04 AM ∙ May 24, 2021

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2,271Likes371Retweets

好孩子不要學：

Kosta Eleftheriou @keleftheriou

The review: “This app forced me to give it a good rating before I could use it.” You: “Pfff, no one’s FORCING you!” The app: 🤯

8:29 PM ∙ May 25, 2021

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6,806Likes2,365Retweets

只要有螢幕的地方就能...

Dr.s @bttfdrs

Twitterとかインスタで見たやつ試しにやってみたらできた！ カッコいい！これで未来に帰れる！⚡️🕰

3:29 AM ∙ May 26, 2021

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32,689Likes9,081Retweets

Arie Peretz @LionKing2303

My imagination going wild right before #WWDC21 is like: Xcode for WatchOS

4:33 AM ∙ May 26, 2021

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544Likes42Retweets

不知道從哪看到的我就想轉一下

阿米娜・阔伊姆@頑張らない？ @jamella_hoshino

10:53 AM ∙ May 26, 2021

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438Likes128Retweets

This is fine.

__難哥 @joe_trash_talk

《火神的眼淚 - 軟體工廠篇》 不知道有沒有搞頭？🤔

4:22 AM ∙ May 28, 2021

🎙weak self podcast 76: 在家工作！WFH 時怎麼樣才不會 WTF

資深聽眾你沒有看錯，節目標題 reuse 了。這次是由有五年 WFH 經驗的波肥來分享絕招。

校正上架 了🤪

💼職缺/履歷交流區

求職履歷：

• Richard Liu (LinkedIn)

如果你有 iOS 相關職缺或是求職履歷想要刊登在「13 的開發者週報」，請見關於。