開發者週報 #129 我是覺得有點卡

Apple/iOS 開發者的一週大小事 2022/02/14-2022/02/20

Feb 20, 2022

13的話

天氣冷到不知道要說什麼了🌚
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🧪iOS 15.4 Beta 3 & Xcode 13.3 Beta

Release notes 建議要讀。

🤔Apple SSD 速度之謎

推文串還滿長的。你需要知道的是，斷電的時候，資料有可能還未寫入。有電池的電腦像是 MacBook Air / Pro 不太需要擔心。但 Mac mini / iMac 就...

Hector Martin @marcan42

Well, this is unfortunate. It turns out Apple's custom NVMe drives are amazingly fast - if you don't care about data integrity. If you do, they drop down to HDD performance. Thread.

Hector Martin @marcan42

Uh, guys? I'm not saying "the machines are only fast because they cheat on data durability". I'm saying there's a stupid, unfortunate performance bug when you *do* want durability that most people won't notice because macOS gives you poor durability by default.

🤪Random Tweets

2/14 這個節日是

𝐠𝐧𝐞𝐡𝐜𝐝𝐫𝐚𝐰𝐨𝐡👁️⃤ @h0wardch3ng

1946年2月14日，世界上第一台通用计算机ENIAC在美国宾夕法尼亚大学诞生，请在这个特殊的节日多陪陪你的电脑

SwiftUI 火力展示

John Sundell @johnsundell

This entire game scene is actually one big SwiftUI view hierarchy! 😀 Hundreds of views, many of them animated, all rendering at a smooth 60 FPS on Mac, iPad and iPhone (even on my iPhone X), with 90+% code sharing across platforms! 🚀 Love how versatile and fast SwiftUI is 👍

Screenshot of a game scene built using SwiftUI

John Sundell @johnsundell

Here's a quick video showing the game running on an iPhone X. Really smooth overall, and this is on a 4+ year old device, and I haven't done almost any performance optimization work yet 😀 SwiftUI continues to impress me!

Live Text 在 Safari 的實作

WildCat @WildCat_io

How #LiveText is implemented in Safari? Besides Apple's OCR algorithms, the text is basically implemented using #ShadowDOM and CSS Transform. github.com/WebKit/WebKit/… Front-end tech still rocks, even for #APPL.

上週的讀者回應（不是）

zonble 🍺 ゾンビル @zonble

我不覺得蘋果的 VR 裝置是眼鏡之類的東西，應該是大腦直接植入晶片的那種。

iOS 15 的新 .background modifier 可設定 ShapeStyle

Thomas Grapperon @tgrapperon

PSA: If you want to get "automatic" vibrancy when setting `.foregroundStyle` to `.secondary` over a `Material` in SwiftUI, you *need* to use the new `.background` modifiers from iOS 15 to draw the background. Otherwise, you'll only get a flat color. #SwiftUI

Screen capture of a SwiftUI preview showing that new iOS 15 API's for background should be used to make the overlaid content vibrant.

我覺得這知識挺實用的呀。這樣就知道為何 SwiftUI 的 state 不需要 Equatable。

Pofat @PofatTseng

#TIL: SwiftUI 比較 view 時首先嘗試比較 memory #不知道也無妨的知識

Joe Groff @jckarter

@Dimillian @anandabits It tries `memcmp` first, because all Swift values should be identical if they compare equal bitwise. It does fall back to Equatable if available

🤝社群活動

CocoaHeads Taipei 2/17 活動錄影

💼職缺/履歷交流區

Ubiquiti Inc. (UI) Android Developer
FunNow

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