Chasen
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chasen.dev
Chasen
@chasen.dev
42 followers 170 following 150 posts
I’m an experienced web developer and Technical Product Owner who’s focused on web technologies and dabbles with Swift on the side. 🪄

This account is cross-posted from my Swift and Web blogs:

https://swift.chasen.dev

https://web.chasen.dev
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chasen.dev
WWDC 2025: https://swift.chasen.dev/2025/06/09/wwdc.html
Three iOS 26 home screens showing app icons. The first screen displays transparent icons; the second shows dark mode icons, and the third features light mode icons. A blurred wallpaper serves as the background, placing focus on the icons. A visionOS interface floating in a warmly lit living room, showcasing the Image Playground feature of Apple Intelligence. At the center, a generated oil painting–style portrait of a smiling woman is bordered by a glowing frame. Style suggestions such as Disco, Sci-fi, and Sunset appear below. A ChatGPT option is visible in the bottom panel, indicating integration for generating images. The entire UI hovers mid-air, blending with the real-world environment. A macOS 15 (Tahoe) desktop displaying the updated Xcode interface. The screen shows Swift code alongside a live UI preview and a new minimap for navigation. The menu bar and window chrome have rounded corners and translucent effects. The desktop background depicts a clear alpine lake with snow-covered mountains under blue sky. iPadOS 26 interface featuring a new systemwide menu bar at the top with items like File, Edit, and View. The layout mimics macOS-style controls, enhancing productivity workflows. The left sidebar, listing content options, appears to float above the app canvas, casting a subtle shadow. A stylus hovers near the screen, suggesting Apple Pencil interaction, with a softly blurred wallpaper in the background.
June 10, 2025 at 4:49 AM
chasen.dev
I’m working from Spain for the next few weeks and I’m feeling grateful to have this as my real meeting background for the week. 💻 Taken with Photo Booth. 😂
A view of neighboring buildings with ornate balconies is visible through a window with a decorative railing.
May 5, 2025 at 10:28 PM
chasen.dev
Happy CSS Naked Day to all those who celebrate! chasen.dev #CSSNakedDay
The chasen.dev webpage displaying in Firefox with no custom styles. On the page, there is a a vertical navigation list, a centered headshot, the name Chasen Le Hara as a heading, a short bio, a Mastodon link, and an About me section with two paragraphs of text showing.
April 9, 2025 at 3:57 PM
chasen.dev
Traveling to Chicago for work this week and coming to terms with this chaotic weather. 😅
Chicago forecast shows rain on Sunday with a range of 46 to 69 Fahrenheit, clouds on Monday with 35 to 46, clouds on Tuesday with 32 to 44, rain on Wednesday with 39 to 71, clouds on Thursday with 46 to 60, and clouds in Friday with 41 to 49.
March 30, 2025 at 3:29 AM
chasen.dev
Woo hoo! Day 100 is “just” a final exam and I passed (with merit)! Almost hard to believe that I’ve come to the end of my #100DaysOfSwiftUI journey.
A “certificate of merit” presented to “Chasen” for completing 100 Days of SwiftUI. It includes a quote: “Programming is an art. Don’t spend all your time sharpening your pencil when you should be drawing.” Below is Paul Hudson’s signature with “Founder” underneath. The white background features faint dotted patterns and a blue-toned calendar on the left, with the “Hacking with Swift” logo in the upper left.
January 20, 2025 at 3:32 AM
chasen.dev
Day 99 included our last quiz and challenge: add a photo credit over the image, fill in some loading/saving methods for favorites, and add sorting to the resorts list. #100DaysOfSwiftUI
The iOS Simulator displays an iPad with a “Resorts” app open in split view. The left pane lists ski resorts with country flags, names, and run counts. At the top of the list, a sort picker is open, showing options “Default,” “Alphabetical” (selected), and “Country.” In the list, “Deer Valley” is highlighted with a heart icon, showing “103 runs.” The right detail view displays a skier in a red jacket navigating deep snow, with the caption “Photo Credit: Maarten Duineveld” in the lower corner. Below the image, resort details are presented, including “Size: Small,” “Price: $$$,” “Elevation: 2,000m,” and “Snow: 103cm.” A descriptive paragraph highlights Deer Valley’s location in Utah, upscale amenities, and its role in the 2002 Winter Olympics.
January 18, 2025 at 6:11 PM
chasen.dev
For Day 98, we implemented searching resorts, replaced the facility info with icons, added a button for the user to mark favorite resorts, and added a favorite indicator in the Resorts list. #100DaysOfSwiftUI
The iOS Simulator displays an iPad with a “Resorts” app open in split view. The left pane lists resorts, and “Vail Ski Resort” is selected with a heart icon. The right detail view shows the resort’s information. A modal alert labeled “Family” overlays the entire screen and says, “This resort is popular with families” with an OK button.
January 18, 2025 at 3:18 AM
chasen.dev
For Day 97 we started actually building a new project using NavigationSplitView, NavigationLink, and format: .list(type: .and) (for concatenating strings). #100DaysOfSwiftUI
The iOS Simulator displays an iPad app with a split view layout. The left sidebar lists ski resorts with names, flags, and run counts, e.g. Squaw Valley in the U.S. has 270 runs. The detail view on the right shows the text, “Welcome to SnowSeeker!” with a prompt to “select a resort from the left-hand menu; swipe from the left edge to show it.” The iOS Simulator displays the same iPad app, now showing “Deer Valley” selected in the sidebar. The detail view features an image of a skier in red gear on snowy terrain, with stats below: size “Small,” price “$$$,” elevation “2,000m,” and snow “103cm.” A description highlights Deer Valley’s location in Utah, its upscale amenities, and its history as a 2002 Winter Olympics venue. Facilities include “Family, Beginners, and Accommodation.”
January 17, 2025 at 3:28 AM
chasen.dev
Day 96 and we’re looking at iPad-friendly APIs for the first time.

I’ll be honest—I had not tried running any of our previous apps in the iPad simulator, but now I see they were working fine the whole time. Pretty cool!

This screenshot looks absolutely chaotic. 👹 #100DaysOfSwiftUI
The iOS Simulator displays an iPad mini interface with a split view layout. The left pane shows a folder labeled “Primary.” The right pane features a search bar with the term “S” entered, a “Cancel” button, and two results, “Subh” and “Stefanie.” Below, links labeled “Tap for sheet” and “Tap for alert” are above text that reads “Name: Paul Country: England Pets: Luna and Arya.” A black circle appears under this text. The same text is repeated again, but in blue. Additional text at the bottom reads “Welcome! Your high score: 0.” A stepper for the high score (with plus and minus buttons) appears below. A floating keyboard bar shows the suggestion “S,” with options like “She” and a microphone icon.
January 16, 2025 at 3:19 AM
chasen.dev
Day 95 was a full challenge day—build an app from scratch based on some requirements!
The iOS Simulator displays a Dice Roller app showing two dice with six sides each. Results include rolls of 2 and 4, totaling 6. A blue “Roll Dice” button is centered below the results. A log displays the roll history and date.
January 15, 2025 at 5:07 AM
chasen.dev
Day 94 is a review and challenge day! Graphics code can be a doozy because when you get the wrong result, it’s difficult to know what’s actually wrong in the code (or with your math). 😅 I got some help with this one. 😬 #100DaysOfSwiftUI
The iOS Simulator displays a rainbow-colored list of rows labeled Row 0 to Row 14, arranged vertically in a tapered, 3D perspective. Colors shift from orange at the top (with a light opacity) to red at the bottom (at full opacity). Tab bar icons include Swift symbols labeled Day 94 (selected), Day 93, Cover Flow, Images, and More.
January 14, 2025 at 7:31 AM
chasen.dev
Day 93 was a fun walk through of using GeometryReader, including using visualEffect() and scrollTargetBehavior(). #100DaysOfSwiftUI
The iOS Simulator displays fifteen rows labeled Row 0 through Row 14, each in a different color. Each row is angled in 3D space, keeping the center in place but rotating the left or right sides, creating a cascading effect. The bottom tab bar contains icons labeled Day 93 (selected), Cover Flow, Images, Frames, and More.
January 13, 2025 at 5:46 AM
chasen.dev
For Day 92, we started a new project (our second to last!) and learned about how layout, alignment guides, and absolute positioning work within SwiftUI.

I really loved the explainer, starting from How layout works in SwiftUI. #100DaysOfSwiftUI
The iOS Simulator displays a white screen with multiple text elements, including “Hello, World!” inside a red rectangle, “Live long and prosper” in black, and overlapping versions of the phrase in varying alignments. Tab bar icons for “Day 92,” “Custom alignment,” and “Alignment” appear at the bottom, with Day 92 selected.
January 12, 2025 at 6:20 AM
chasen.dev
Picking #100DaysOfSwiftUI back up, and in the home stretch at Day 91! It was a challenge day with a review quiz and an open-ended prompt to fix a couple minor bugs and add a feature.
The iOS Simulator displays a flashcard with a quiz question reading, “What is Taylor Swift’s birth year,” on a scratched metallic background. A timer at the top shows 91 seconds remaining, with circular buttons for cancel and confirm at the bottom corners.
January 11, 2025 at 3:10 AM
chasen.dev
For Day 90, we made a bunch of accessibility fixes and added a view for creating new cards! #100DaysOfSwiftUI
The iOS Simulator shows a card creation interface with text fields for Prompt and Answer, an Add Card button below, and a Done button at the top.
January 4, 2025 at 5:08 AM
chasen.dev
2024 iPhone Home Screens: https://swift.chasen.dev/2024/12/31/iphone-home-screens.html
An iOS home screen (in Small icon mode with labels under the icons) showing a blurred gray background, indicating an overcast day. The first row has a Health widget and Camera. The second row has Start Morning, Start Dishes, Self Care, and InBody. The third row has Take Vitamins, Brush Teeth, Face Routine, and Balance Health. The fourth row has Start Jackson, Start Stretching, Start Exercise, and Start Shower. The fifth row has Start Coffee, Start Food, Drink Water, and Start Work. The dock at the bottom has Messages, Music, Overcast, and Safari. An iOS home screen (in Large icon mode without labels under the icons) showing a blurred gray background, indicating an overcast day. The first row has a Health widget and Camera. The second row has Start Morning, Start Dishes, Self Care, and InBody. The third row has Take Vitamins, Brush Teeth, Face Routine, and Balance Health. The fourth row has Start Jackson, Start Stretching, Start Exercise, and Start Shower. The fifth row has Start Coffee, Start Food, Drink Water, and Start Work. The dock at the bottom has Messages, Music, Overcast, and Safari. An iOS home screen (in Small icon mode with labels under the icons) showing a blurred outdoor background. The first row has a Fitness widget and Camera. The second row has Voice Memos, Drink Water, Start Food, and Start Shower. The dock at the bottom has Messages, Music, Overcast, and Safari. An iOS home screen (in Large icon mode without labels under the icons) showing a blurred outdoor background. The first row has a Fitness widget and Camera. The second row has Voice Memos, Drink Water, Start Food, and Start Shower. The dock at the bottom has Messages, Music, Overcast, and Safari.
January 1, 2025 at 6:37 AM
chasen.dev
For Day 89, we learned how to detect when our app moves to the background or foreground so we could pause and restart our timer at the right moment. #100DaysOfSwiftUI
The iOS Simulator displays a trivia app with a question card reading, “Who played the 13th Doctor in Doctor Who” and a timer showing 89 seconds remaining. On the right is a “check” button and on the left is a “cancel” button. The background is a scratched metal texture.
December 28, 2024 at 3:32 AM
chasen.dev
For Day 88, we built a brand new part of the app with a stack of cards and gestures for swiping them left and right to move to the next card. #100DaysOfSwiftUI
The iOS Simulator displays a flashcard with the question, “Who played the 13th Doctor in Doctor Who,” against a gray, scratched metal background.
December 27, 2024 at 5:46 AM
chasen.dev
For Day 87, we learned a little bit about the Combine framework, Timer, and three accessibility settings: Differentiate Without Color, Reduce Motion, and Reduce Transparency. #100DaysOfSwiftUI
The iOS Simulator displays a white screen with the text Timer and ScenePhaseView near the top. A green “Success” button appears in the center, followed by blue text “ReduceMotionView!” and a gray button labeled “ReduceTransparencyView!” The bottom tab bar includes a Day 87 tab (selected) and a Day 86 tab. The iOS Simulator shows the same screen as the previous image with a couple differences. The “Success” button is now black with white text and a checkmark icon. The “ReduceTransparencyView!” button is also black with white text. Other elements remain the same.
December 24, 2024 at 3:42 PM
chasen.dev
For Day 86, we started a brand new project and started playing with all the gesture APIs and hit testing. #100DaysOfSwiftUI
The iOS Simulator displays a white screen with text prompts including double tap me, long press me, magnify me, rotate me, and tap on me at the top. Below, a small red circle is positioned above a larger red circle that partially overlaps a blue square. The text Hello is centered beneath the shapes, and World is spaced further down near the bottom of the screen. At the very bottom is a tab bar with Day 86 selected.
December 23, 2024 at 2:05 AM
chasen.dev
Day 85 is a challenge day! The quiz was easy but the challenge took me about an hour to complete. The “contacted” icon, link to an edit screen, and sort options are all new. #100DaysOfSwiftUI
The iOS Simulator displays an app with the title Everyone at the top . A sorting menu is open, offering options to sort by name or date added. Sort by Name is selected, shown with a checkmark. Below the menu, two contacts are listed: Ada with the email ada@example.com and Paul Hudson with the email paul@hackingwithswift.com. The bottom navigation bar includes five tabs: Everyone, Contacted, Uncontacted, Me, and More, with Everyone currently selected.
December 22, 2024 at 5:12 PM
chasen.dev
For Day 84, we learned how to add swipe actions to list items and show local notifications using the UserNotifications framework! #100DaysOfSwiftUI
The iOS Simulator displays a lock screen with the date Friday, December 20, the time 6:42, and a notification labeled Contact Paul Hudson with an email address. The background shows a gradient of soft pink and blue hues.
December 21, 2024 at 3:03 AM
chasen.dev
Day 83 has this tidbit:

"The CPU running our code doesn’t care about data types, comments, access control, and more, but if you want to write great software that is scalable, testable, and maintainable, you need to add some rules."

There’s a... https://swift.chasen.dev/2024/12/17/day-has-this.html
The iOS Simulator displays a contact list titled Everyone, showing one contact: Paul Hudson with the email paul@hackingwithswift.com. A blue checkmark indicates the contact is selected and a blue “Delete Selected” button appears at the bottom of the view. Below that, a tab bar highlights the Everyone tab and includes options like Contacted, Uncontacted, Me, and More.
December 18, 2024 at 2:53 AM
chasen.dev
Day 82 was much easier—I don’t think there was anything new, we “just” laid the groundwork for the new tabs and added the SwiftData pieces to store the contact info. #100DaysOfSwiftUI
The iOS Simulator displays a contact list under the heading “Everyone” with one contact named Paul Hudson and the email paul@hackingwithswift.com. The bottom tab bar shows icons for Everyone, Contacted, Uncontacted, Me, and More.
December 17, 2024 at 3:46 PM
chasen.dev
Today was almost smooth sailing, learning about list row swipe actions and local/scheduled notifications, but I ran into issues with the directions for adding Swift package dependencies in Xcode.

I wrote up the issue and my fix in this issue: Day 81: No such module 'SamplePackage' #100DaysOfSwiftUI
Xcode error panel shows five issues in the HotProspects project. A red error states, “No such module SamplePackage” in Day81.swift. Four gray errors indicate missing files like HotProspects.abi.json, swiftmodule, and related outputs in the derived data folder. The Xcode Build Phases screen is open for the HotProspects project. It lists project phases like Target Dependencies, Compile Sources with five items, and Link Binary With Libraries, which includes a single required package named SamplePackage.
December 17, 2024 at 2:51 AM