Dominik Hofer

Day 67 #100DaysOfSwiftUI

✅ Added some additional features on my own

Explored some more CIFilter options, there are surprisingly many!

Also learned that you can just disable views by checking if an optional is empty.

Yesterday, instead of completing the next day of #100DaysOfSwiftUI, I did something even more exciting.

I created my own lil app, a minimal Tichu counter 🃏

Pretty simple right now but if anyone wants to try it out, let me know :)

It's time 🥳

Uno #008

School has started and you're looking for a suitable notetaking app for students?

@rem_note is all you'll ever wish for: Easy to use interface based on nested bullet points and even better: The ability to easily create flashcards right from your notes to practice.

Day 66 #100DaysOfSwiftUI

✅ Built the Instafilter project (part II)

Two things that bug me right now is that the gray background can be bigger than the image itself and that there is no success message (maybe these are going to be tomorrow's challenges 🤔).

I have a new addiction…

Day 65 #100DaysOfSwiftUI

✅ Built the Instafilter project (part I)

🔑 takeaways:
👉 You can place optional views in UI

This day was a real blessing compared to yesterday 😂

But it's great to see how fast I can already build UIs by now!

Day 64 #100DaysOfSwiftUI

✅ Final introduction to the Instafilter project

🔑 takeaways:
👉 Use coordinator to create delegates (bridge to SwiftUI), which is pretty complicated
👉 Edit info of target for certain operations
👉 Saving an image also requires UIKit

Day 63 #100DaysOfSwiftUI

✅ Further introduction to the Instafilter project

🔑 takeaways:
👉 CoreImage is the image manipulation framework (quite hard to get it to work though)
👉 You have to use UIKit sometimes inside of SwiftUI, which is possible (e.g. the photo picker)

So true, I feel like getting distracted can also be a very good way to get inspired.

Both extremes are not healthy: Productivity obsession vs. always being distracted. https://xcancel.com/linuz90/status/1562379235020656642

Day 62 #100DaysOfSwiftUI

✅ Overview of the Instafilter project

🔑 takeaways:
👉 .onChange() is the best way to react to state changes
👉 .confirmationDialog() is an alert with multiple buttons

Funny that I've only learned about .onChange() yesterday 🤓

Day 61 #100DaysOfSwiftUI

✅ Added CoreData to the personal CRM app

Took me two days to implement the CoreData functionality, but it was so worth it – I learned a ton!

Here are the most noteworthy things 👇

Didn't finish today's challenge for #100DaysOfSwiftUI, was way harder than I thought so far.

Will continue tomorrow ✌️

Day 60 #100DaysOfSwiftUI

✅ Created a personal CRM app

This app was not that hard UI-wise, but quite a challenge to get all the data stuff correctly.

Definitely not perfect, but solid I think :)

Read on for a few behind the scenes 👇

Day 59 #100DaysOfSwiftUI

✅ Deep dive into CoreData (part III)

Extended the FilteredListView a bit and made it more versatile.

I especially liked the use of enums to ensure that only valid predicates are entered.

Below is my code, if anyone is interested 🤓

Day 58 #100DaysOfSwiftUI

✅ Deep dive into CoreData (part II)

🔑 takeaways:
👉 Use NSPredicate to filter query
👉 Make FetchRequests in subview (with SQL-like syntax)
👉 CoreData relationships

These were some fun but also complex topics today, was great :)

Day 57 #100DaysOfSwiftUI

✅ Deep dive into CoreData (part I)

🔑 takeaways:
👉 .self refers to the whole object → computes hash value
👉 Create a NSManagedObject subclass to handle optionality in one central place
👉 Check if changes were made to the moc
👉 NSMergePolicy

Day 56 #100DaysOfSwiftUI

✅ Added some additional features on my own

This challenge wasn't that hard, but I got to reuse some concepts from previous lessons. Especially working with dates and unwrapping optionals with if let.

Day 55 #100DaysOfSwiftUI

✅ Built the Bookworm project (part II)

🔑 takeaways:
👉 Sort data in FetchRequest with a SortDescriptor
👉 Place ToolbarItems in different locations
👉 You can also use dismiss to go back to the last screen

Want to learn SwiftUI the visual way – for free?

I just stumbled upon this great resource by @BigMtnStudio. 💯% worth downloading!

https://www.bigmountainstudio.com/free-swiftui-book

Uno #007

Are you a student or someone who struggles to focus for a long time? Then you should definitely try a pomodoro timer!

The best app I found for this is @stayinsession by @philipyoungg.

Great design, great UX – really love all the thoughtful details.

Day 54 #100DaysOfSwiftUI

✅ Built the Bookworm project (part I)

🔑 takeaways:
👉 Use constant bindings in previews
👉 Must use nil coalescing when displaying data from CoreData

Really like the rating view with the stars, my first proper reusable component!

Day 53 #100DaysOfSwiftUI

✅ Overview of the Bookworm project

🔑 takeaways:
👉 @ Binding for changing values in other views
👉 TextEditor for multiline text fields
👉 Intro to CoreData

I feel like with some CoreData skills, I'll finally be able to create my own real apps 🥳

Day 52 #100DaysOfSwiftUI

✅ Added some additional features on my own

Like in the Moonshot project, I mainly got to refactor some of the code.

And I learned how valuable it is to create a “wrapper class”, which is much easier to make conform to the Codable protocol:

Things I ❤️ about building apps for : The lil details that work automagically.

E.g. the stepper component allows you to long-press a button to change the variable faster. After five iterations, the counter increases in speed.

Awesome!

Day 51 #100DaysOfSwiftUI

✅ Built the Cupcake Corner project (part II)

🔑 takeaways:
👉 You can create multiple class initialisers
👉 Codable, URLRequest and URLSession are a powerful combo
👉 Place async function call in button inside Task
👉 ! for force unwrapping

Great quote from todays lesson in #100DaysOfSwiftUI from @twostraws.

This is exactly the kind of design I'll try to implement in my apps.

Day 50 #100DaysOfSwiftUI

✅ Built the Cupcake Corner project (part I)

🔑 takeaways:
👉 Save data like types as static arrays in class
👉 Use indices property to get the indices of array
👉 Toggle view
👉 Put validations in data not view (computed property)

Day 49 #100DaysOfSwiftUI

✅ Overview of the CupcakeCorner project

🔑 takeaways:
👉 Codable doesn’t work with @ Published, create custom initializer & encoder
👉 async/await and .task for loading data
👉 AsyncImage for loading images
👉 Validate & disable forms with .disabled()

Day 48 #100DaysOfSwiftUI

✅ Break day

Nearly 50% done with the course and today was the first day I didn't actually write any code. But I've watched two great videos instead.

If you have any spare time today and are (becoming) a coder, watch this video by @stevewoz 👇

By the way, I uploaded all my #100DaysOfSwiftUI code to GitHub.

So if you need some help with a challenge or just want to know, how someone else solved it, feel free to take a look!

Will regularly update it.

(Thanks for the idea @rungxanh1995)

🔗 https://github.com/hfrdmnk/hacking-with-swiftui

Day 47 #100DaysOfSwiftUI

✅ Created the simplest habit tracker ever

This was the first app that I completely built by myself that is actually useful. Impressive, I know 😉

Will probably add a few features if I have time the coming days.

Read on for a few behind the scenes 👇

Uno #006

Tracking expenses is the best way to gain an overview over your finances. But doing it regularly can be tedious.

The solution – an app like @FiveCentsApp by @degisner. It's simple, beautiful and works like a charm.

Entering expenses is as quick as it can get.

Day 46 #100DaysOfSwiftUI

✅ Made my own custom shapes

Doesn't look that beautiful but was a great way to repeat some of the learnings from this section.

Now looking forward to the next bigger challenge tomorrow (already had a look 🤫).

Exactly what I needed 🤓 https://xcancel.com/FloWritesCode/status/1554692285052354560

Day 45 #100DaysOfSwiftUI

✅ Animating shapes

🔑 takeaways:
👉 .blendMode()
👉 Animate shape changes with animatableData
👉 For multiple props, use AnimatablePair
👉 Only Doubles can be interpolated (not Ints)

Made something even cooler today than yesterday!

Day 44 #100DaysOfSwiftUI

✅ Drawing more advanced shapes

🔑 takeaways:
👉 Use stride to create a custom range
👉 CGAffineTransform
👉 FillStyle(eoFill: true) for even-odd filling
👉 Image border with ImagePaint()
👉 Enable Metal with .drawingGroup()

Wanna see something cool?

Want to learn more about designing for iOS?

@designcodeio has a handy guide to follow. Much better consumable than the HIG.

https://designcode.io/ios-design-handbook-intro-to-ios-14-design

Anyone want an invite for Arc @browsercompany?

First come, first serve ✌️

Day 43 #100DaysOfSwiftUI

✅ Drawing simple shapes

🔑 takeaways:
👉 Use Path type to draw shapes
👉 Shapes are built using paths, but more flexible
👉 .strokeBorder() draws on the inside (use InsettableShape protocol)

Here's a struct that draws an arc (great for charts) 👇

Day 42 #100DaysOfSwiftUI

✅ Added some additional features on my own

This challenge consisted mostly on refactoring. Got some practice in extracting SwiftUI views and passing data down the tree.

Also learned how to style a list background:
https://xcancel.com/dominikhofer_/status/1554857330382192643

Found a handy tool to compress gifs 👉 https://ezgif.com/optimize

Quick SwiftUI tip:

I struggled to figure out how to change the background of a list in SwiftUI.

Turns out, you need to use the .onAppear modifier 👇

Day 41 #100DaysOfSwiftUI

✅ Built the Moonshot project (part II)

🔑 takeaways:
👉 Use struct initializer to “merge” JSON files
👉 .navigationBarTitleDisplayMode(.inline) on subviews
👉 Force unwrap with !

Also added a little indicator about which crew member was the commander.

Day 40 #100DaysOfSwiftUI

✅ Built the Moonshot project (part I)

🔑 takeaways:
👉 Use a separate file to load data into app
👉 Generics are useful for reusability
👉 Use computed properties in your structs
👉 Define colors with an extension
👉 .preferredColorScheme(.dark)

Uno #005

Newsletters cluttering up your inbox?

No problem, just use a dedicated inbox for all the newsletters you don't want to miss. I personally like @stoopinbox. It gives you a special email address and reading app.

What's a newsletter everyone should subscribe to?

Day 39 #100DaysOfSwiftUI

✅ Overview of the Moonshot project

🔑 takeaways:
👉 .resizeable() to resize images with .scaledToFit/Fill()
👉 GeometryReader is really powerful for resizing
👉 ScrollView
👉 Lazy stacks/grids for lazy loading
👉 NavigationLink to “connect” views

Really interesting thread on colors in todays world (and how it used to be): https://xcancel.com/culturaltutor/status/1551976051860963333

Day 38 #100DaysOfSwiftUI

✅ Added some additional features on my own

This was a fun project to work on, something I would actually use myself with a few more features 🙌

I especially like the idea with the picker up top to select the entries that should be shown.

Day 37 #100DaysOfSwiftUI

✅ Built the iExpense project

🔑 takeaways:
👉 Organize classes & structs in other files
👉 Use UUID() to create unique ids
👉 Pass data to child views as ObservableObject
👉 Use didSet and initializer to write/read data from class to UserDefaults