Back at it after a little Thanksgiving break and we’ve run into our first (I think) need to use @MainActor.

Today we added the ability to change image filters and share the resulting image. #100DaysOfSwiftUI

The iOS Simulator displays an app titled Instafilter. The image of flowers from Day 65 is shown, but this time through a “crystallize” filter. The “Intensity” slider is set to 75% with “Change Filter” and “Share…” buttons below. Underneath is a bottom tab bar with four tabs labeled Day 65–66, Day 64, Day 63, and Day 62, with Day 65 selected.

Day 65 and this sort of thing still gets me:

We can then call that whenever our selectedItem property changes, by attaching an onChange() modifier somewhere in ContentView – it really doesn’t matter where, but attaching it to the PhotosPicker would seem sensible.

We covered modifiers and building our own much earlier in the course, but I still don’t have a good mental model for how/why you can put some of them anywhere and they’ll work. #100DaysOfSwiftUI

The iOS Simulator displays an app titled Instafilter. A sepia-toned image of flowers is shown, with a slider labeled “Intensity” set to 75% with a “Change Filter” button below. Underneath is a bottom tab bar with four tabs labeled Day 65, Day 64, Day 63, and Day 62, with Day 65 selected.

For Day 64 we learned how to use PhotosPicker to… let the user pick photos, use ShareLink to… create share links, and call requestReview() to… request the user leave a review of our app! #100DaysOfSwiftUI

The iOS Simulator displays a screen with links/options in blue text, including “Select a picture,” two “Share…” buttons, “Spread the word about Swift,” “Click to share,” and “Leave a review.” A bottom tab bar shows three tabs labeled Day 64, Day 63, and Day 62, with Day 64 selected.

For Day 63, we learned about the different Image APIs available: Image, UIImage, CGImage, and CIImage. We also tried out ContentUnavailableView!

I continued my normal practice of keeping all the sample code in the project and building UI to see it all. #100DaysOfSwiftUI

The iOS Simulator displays a segmented control with options including sepia, pixellation, crystal, twirl, and dynamic. Below, a “Bro, do you even Swift?” meme (with a picture of Taylor Swift) is displayed with a sepia filter applied. Below the image is a placeholder view with the Swift logo, text that says “No snippets,” a “Create Snippet” button, and a tab bar with Day 63 selected.

For Day 62, I liked that we were shown “Open Quickly” in Xcode and told how to find the definition of a generated interface. I don’t fully understand it now, but I know I will in a couple years.

Oh, and for the start of a new project, we played around with confirmationDialog(). #100DaysOfSwiftUI

The iOS Simulator displays an app with “Hello World” text that is blurred out based on the value of a slider below the text. A red square labeled “Hello, World!” is in the center of the view. A confirmation dialog overlays the screen at the bottom with a prompt to select a color. Options are “Red,” “Green,” “Blue,” and “Cancel.”

Nope, today was the hardest challenge.

I thought it was weird that yesterday’s challenge didn’t require us to use SwiftData (when we had just spent a bunch of days working with it).

Day 61, the other shoe drops—we need to rewrite yesterday’s app to use SwiftData. #100DaysOfSwiftUI

I thought yesterday was our most difficult day so far… now Day 60 has surpassed it.

Today we built an app from scratch with just some requirements to fetch data and build a couple views. Straightforward but a lot of work! #100DaysOfSwiftUI

The iOS Simulator displays a “Friendface” app with the current screen on a user profile view for one of the contacts. The “general info” section includes the contact’s name, age, company, email, and address. Below, an about section contains placeholder text, and a tags section lists terms separated by commas.

Wow, I’m impressed with myself for learning and SwiftData/SwiftUI for being easy.

For Day 59, we had to go back to an old app and upgrade it to use SwiftData, add sorting, and add filtering. It took me about an hour to do everything, which is a lot faster than I expected. #100DaysOfSwiftUI

The iOS Simulator displays an “iExpense” app. The toolbar includes buttons to add new expenses and sort. A segmented control allows the main list of expenses to be sorted by “All,” “Business,” or “Personal” (with Business currently selected). The two listed expenses include “Phone, $34.35” and “Travel, $123.45.”

Day 58: Continuing yesterday’s project and learning about NSPredicate, changing fetch requests dynamically, and creating relationships. One of today’s sections is about syncing SwiftData with CloudKit, but I skipped it because I don’t have a paid developer account (yet)! #100DaysOfSwiftUI

The iOS Simulator shows a Users screen with a sortable list. Names include Ed Sheeran, Johnny English, Piper Chapman, Rosa Diaz, and Roy Kent. Each name has a blue badge (indicating job counts) showing the number zero except Piper Chapman, which shows two.

Starting a new project for Day 57, so don’t have much to show so far. We’re learning how to edit SwiftData objects with SwiftUI and filter data using #Predicate. #100DaysOfSwiftUI

The iOS Simulator displays a list titled Users, showing names Ed Sheeran, Johnny English, Rosa Diaz, and Roy Kent. Each name is in a row with a right-facing arrow, and a plus icon is at the top right for adding users.

Day 56 was a review and challenge (on our own) day, so I updated the detail view to handle missing data more gracefully. #100DaysOfSwiftUI

The iOS Simulator displays a Bookworm app screen showing a book with a forest-themed cover labeled Fantasy. The text says No author. Below is a rating of three out of five stars and a note saved on Nov 16, 2024, at 8:01 PM.

For Day 55 we learned how to delete SwiftData objects, sort queries using SortDescriptor, and add custom buttons to alerts. #100DaysOfSwiftUI

The iOS Simulator displays a confirmation dialog asking, “Delete book. Are you sure?” with options to “Cancel” or “Delete.” The app shows “The Little Prince” by Antoine de Saint-Exupéry, with a fantasy-themed cover image and navigation tabs at the bottom.

For Day 54, we earnestly started the implementation of a “Bookworm” app and created new SwiftData models and SwiftUI components.

I think the only new APIs were .constant() and using .buttonStyle(.plain) to disable the whole “tap the row to trigger its buttons” behavior. #100DaysOfSwiftUI

The iOS Simulator displays an “Add Book” screen with fields for the title “The Little Prince,” author “Antoine de Saint-Exupéry,” genre set to “Fantasy,” a review input containing “Fantastic,” a five-star rating, and a “Save” button.

Day 53 is the start of our first project with SwiftData. So far all the terminology reminds me of my Core Data days. #100DaysOfSwiftUI

The iOS Simulator displays a Classroom app with a list of student names: Ginny Weasley, Ron Lovegood, and Hermione Potter. A header reads “Classroom” with an “Add” button in the top-right. The bottom navigation shows icons labeled Students and Notes.

Day 52 is a review quiz and challenge day. I found the challenges pretty easy this time around! #100DaysOfSwiftUI

The iOS Simulator shows a checkout screen featuring cupcakes and a total of $37.50. A pop-up alert error message says, “Checkout failed. Received error: resource exceeds maximum size.” App navigation icons appear along the bottom of the screen.

It’s our first day using the debugger! I love debuggers so much. I feel like teaching how to use real debuggers is undervalued by the developer community.

Day 51, officially over half-way done with #100DaysOfSwiftUI!

Xcode displays three panels: the first with a breakpoint paused on a line of code in a `placeOrder` function, the second with the running app’s preview paused (showing a “Place Order” screen), and the third with a JSON object as a string.

Continuing our new project in Day 50 by using CodingKeys to make @Observable get along with JSONEncoder().encode(), and learning about haptics with the .sensoryFeedback() modifier and CHHapticEngine. #100DaysOfSwiftUI

The iOS Simulator displays a “Cupcake Corner” app with a form to select the cake type (set to “Rainbow”), adjust the quantity (set to “18”), add extra frosting or sprinkles, and enter delivery details. Toggle switches for frosting and sprinkles are on and off, respectively. A navigation bar at the bottom has tabs for Order (currently selected), List, Image, Form, and More.

New project day! Day 49 was focused on async/await, URLSession.shared.data(), AsyncImage, and the .disabled() modifier. I’m continuing to use TabView so I can keep all the sample code around in a project. #100DaysOfSwiftUI

An iOS simulator displays an app with three tabs at the bottom: List, Image, and Form. The current tab is “List” and the view shows a long list of Taylor Swift songs. Titles include “Our Song,” “Tim McGraw,” and more.

Day 48 included watching two videos. Paul’s had a fun premise (“What Star Wars Can Teach Us About Swift”) and Woz’s video seemed aimed at high-schoolers, but had some good takeaways: “make your studies… a fun part of life” and “always try to be creative and think different.” #100DaysOfSwiftUI

Day 47 was a review and challenge day, with an entire app we had to build from scratch on our own. I’m stoked it only took me 30 minutes to put together this app! #100DaysOfSwiftUI