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Bringing MVVM into our SwiftUI project, part 1

43:39

ULTIMATE PORTFOLIO APP

Bringing MVVM into our SwiftUI project, part 1

The final major change we’re going to make to our project is to look at how it fits in with the MVVM design pattern. I left this one to last because it’s quite a jump from our previous work and in some respects SwiftUI even fights against it, but I do think it’s worth exploring so you can be sure your code is sound.  Continue Reading >

UI Testing with SwiftUI

40:37

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UI Testing with SwiftUI

Even after writing stacks of unit tests, chances are your test coverage is still well below 40%. Those units tests are really important, but if you really want great test coverage you need to add some UI tests and that’s exactly what we’re going to work on here.  Continue Reading >

Measuring performance

17:57

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Measuring performance

Although our project doesn’t do anything particularly performance intensive, having a great portfolio app means you should at least attempt to demonstrate you understand how performance tests work. In this chapter we’ll add just such a test to our project, to make sure our award counting work is fast.  Continue Reading >

Testing extensions

26:04

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Testing extensions

Our project has three extensions that add functionality to Apple’s own code, and we need to treat these carefully – we don’t own them, so their behavior might change at any point in the future. So, in this article we’re going to write tests for the extensions we created, making sure they work correctly every time.  Continue Reading >

Testing development data

29:48

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Testing development data

In previous tests we relied upon our sample data creating 5 projects and 50 items, but that isn’t set in stone right now – it’s an implementation detail, meaning that it’s a behavior that happens to be the case but isn’t explicitly guaranteed. This is a common cause of bugs, so in this article we’re going to write tests for our development code, and along the way discover and resolve some interesting quirks…  Continue Reading >

Testing Core Data

26:18

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Testing Core Data

Our app relies extensively on user data, so if there’s one part of it that absolutely must be bullet proof it’s our Core Data stack. In this article we’ll explore writing tests for our data, including projects, items, and awards.  Continue Reading >

Testing the basics

21:54

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Testing the basics

At last it’s time to start writing tests for our project, which means a little bit of setup work backed by writing our first couple of tests – we’ll take this slow initially, but lay down a good foundation for future tests.  Continue Reading >

Organizing the project itself

21:40

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Organizing the project itself

We have one last easy task before we look at something trickier, which is to organize the Xcode project itself. Here I’m going to show you two different approaches so you can contrast them yourself, then explain which I prefer and why.  Continue Reading >

Documenting our code

41:58

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Documenting our code

Good documentation describes not only what code does, but provides context on why it works a certain way, what assumptions you made, any optimizations you made, as well as describing subtleties in the implementation if you’re dealing with difficult code. In this article we’re going to be documenting our project for other developers and beyond!  Continue Reading >

Linting our code

35:00

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Linting our code

Code is designed to be read far more often than it is written, and one of the simplest ways of making code easier to read is to make it uniform – to make sure your code follows a simple style, so your brain can focus less on spacing and naming and more on understanding how the code actually worksContinue Reading >

Core Data delete rules and predicates

14:20

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Core Data delete rules and predicates

One of the least obvious but most important clean ups lies in our use of Core Data, because right now we’re leaking data and also showing flat out wrong data. To fix these we need to use some more advanced Core Data, so let’s get into it…  Continue Reading >

Questions and answers, part 2

46:09

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Questions and answers, part 2

I’ve had a whole bunch more questions sent in from readers, covering Core Data, property wrappers, localization, and more, so let’s dive into them with some code examples.  Continue Reading >

Cleaning up view code

37:26

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Cleaning up view code

Although our SwiftUI layouts conform to the View protocol, if you were to try to think about them in MVC terms I’d say they were more like controllers. And like controllers from UIKit, we need to put in some work to keep SwiftUI views lean – let’s look at this now…  Continue Reading >

Making your app accessible

33:12

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Making your app accessible

It is my firm belief that every iOS app should be usable to everyone, and putting in the work to make your app function well no matter who is using it says a lot about the kind of developer you are.  Continue Reading >

Internationalization and localization

53:54

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Internationalization and localization

Our app was designed to work in English, and although you might not want to change that your should at least be able to change. Let’s start with that…  Continue Reading >

Now for the real work…

04:26

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Now for the real work…

Everything we’ve done so far has produced a serviceable app, although it does have a few bugs that we’ll address later. But before we address those, I want to change gear and focus on making our existing code better. This is where the real work begins!  Continue Reading >

Creating the Home view

35:49

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Creating the Home view

So far our home view has simply been a host for adding test data, but that changes now: we’re going to make the home view a summary of all their project progress, plus the most important items coming up next.  Continue Reading >

Counting Core Data results

20:34

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Counting Core Data results

Now that we’ve designed a basic awards UI, we can bring it to life with some Core Data queries to determine which awards have actually been earned.  Continue Reading >

Reading awards JSON

34:37

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Reading awards JSON

Parsing data into your app is the single most common task any iOS developer needs to do, so in this article we’ll start to build out an Awards tab using JSON.  Continue Reading >

Finishing ProjectsView

22:32

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Finishing ProjectsView

At this point our main list view is almost done, but before we’re finished we’re going to add some icons, make landscape mode work better, and even fix a rather nasty deletion bug.  Continue Reading >