JuniperPhoton’s Substack

Supporting JPEG-XL compression in Apple ProRAW Capture

Pinpoint some trouble you may encounter when supporting JPEG-XL

Jan 25 • JuniperPhoton

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December 2025

My Pivot in 2025

Hey everyone.

Dec 24, 2025 • JuniperPhoton

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October 2025

Adopting Liquid Glass: Experiences and Pitfalls

Updated for iOS 26.1 / iPadOS 26.1

Oct 3, 2025 • JuniperPhoton

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September 2025

Adopting the New Window Controls in iPadOS 26

iPadOS has been evolving, and this year Apple is pushing the windowing experience even further in iPadOS 26 with the new Window Controls and a…

Sep 28, 2025 • JuniperPhoton

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August 2025

Inspect & optimize Image Decoding timing in iOS

Displaying images in iOS is both easy and challenging.

Aug 17, 2025 • JuniperPhoton

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July 2025

Observation framework: Beyond the documentation about observing property changes

Starting with iOS 17, Apple introduced the Observation framework to make updating SwiftUI views more efficient.

Jul 27, 2025 • JuniperPhoton

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SwiftUI + Core Animation: Demystify all sorts of Groups

Understand DrawingGroup, CompositingGroup and GeometryGroup in the Core Animation way

Jul 21, 2025 • JuniperPhoton

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Rethinking ViewModel in SwiftUI

The question of whether the ViewModel concept should exist has become increasingly prevalent recently.

Jul 19, 2025 • JuniperPhoton

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SwiftUI 2025: What’s Fixed, What’s Not, and How I Build Apps Now

In 2022, I wrote an article about the state of SwiftUI and whether it was possible to build a complete app without using UIKit or AppKit.

Jul 15, 2025 • JuniperPhoton

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June 2025

Photon’s Indie Dev: June 2506

with extra content: me seeking for a job in Japan

Jun 29, 2025 • JuniperPhoton

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WWDC 25 NOTES: Game of identifying running threads in Swift 6.2

Apple introduced some changes regarding Swift Concurrency in WWDC 25.

Jun 17, 2025 • JuniperPhoton

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WWDC 25 NOTES: Thoughts about being Sherlocked or copied

In tech, “Sherlocked” means a platform copies a third-party app’s features, making the original obsolete.

Jun 15, 2025 • JuniperPhoton

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