NEW: Subscribe to Hacking with Swift+ and accelerate your learning! >>

< Back to Hacking with Swift+

Making the most of optionals

In the full episode…

  • Exploring Optional’s internals
  • Adding conditional conformance
  • Boxing and indirect optionals
  • Challenges
  • Further reading
Get the full 23:07 video by subscribing

Why subscribe?


Hacking with Swift+ delivers high-quality tutorials for subscribers, with each tutorial coming as a 4K Ultra HD video and in text form so you can read or watch – whatever works best for you.

So, you can get this full video and article as well as all other subscriber-only tutorials and all future tutorials – all by subscribing to Hacking with Swift+ today.

Subscribe to Hacking with Swift+

More from Hacking with Swift+


How to use phantom types in Swift
ADVANCED SWIFT

FREE: How to use phantom types in Swift

Phantom types are a powerful way to give the Swift compiler extra information about our code so that it can stop us from making mistakes. In this article I’m going to explain how they work and why you’d want them, as well as providing lots of hands-on examples you can try.

Creating a WaveView to draw smooth waveforms
CUSTOM SWIFTUI COMPONENTS

FREE: Creating a WaveView to draw smooth waveforms

In this article I’m going to walk you through building a WaveView with SwiftUI, allowing us to create beautiful waveform-like effects to bring your user interface to life.

Using memoization to speed up slow functions
HIGH-PERFORMANCE APPS

FREE: Using memoization to speed up slow functions

In this article you’ll learn how memoization can dramatically boost the performance of slow functions, and how easy Swift makes it thanks to its generics and closures.

Merging multiple requests with Combine
NETWORKING

Merging multiple requests with Combine

In a previous article I showed you a smart, simple and safe way of fetching data from the internet using Combine. This article I want to look at how to handle multiple network requests safely, ensuring that both complete before you update your user interface.

Using dates safely and effectively
MAKING THE MOST OF FOUNDATION

Using dates safely and effectively

Working with dates in software is hard, and if you don’t understand why then think about time zones, think about leap years, or think about how it’s the year 2563 in the Thai calendar. Apple gives us many tools for making them easier but they can be hard to discover, so in this article I’m going to try to provide some clear guidance for what to use and when.

Finding and fixing slow rendering
HIGH-PERFORMANCE APPS

Finding and fixing slow rendering

Instruments is a powerful tool for identifying performance problems, but in this article I’ll show you how to find code that slows down rendering in your app, causing slow scrolling, wasted CPU time, and more – all through the simulator.

Creating a TabbedSidebar that handles both tab view and sidebar
INTERMEDIATE SWIFTUI

Creating a TabbedSidebar that handles both tab view and sidebar

If you want your app to work well on larger devices, you need to support both a sidebar and a tab bar for your primary navigation. In this video I’ll show you how to build one simple SwiftUI component that transitions between both smoothly.

Building a RadialMenu that shows many buttons around it
CUSTOM SWIFTUI COMPONENTS

Building a RadialMenu that shows many buttons around it

Sometimes pressing a button needs to present more buttons, and although you can use an action sheet for this it’s not ideal because it appears in a different location. In this article I’ll show you how to build a radial menu, which solves the problem by presenting a ring of buttons close to the user’s touch.

Creating a FilteringList to filter a list using text input
CUSTOM SWIFTUI COMPONENTS

Creating a FilteringList to filter a list using text input

Many apps show lots of data in a list, and allow users to filter that list by typing in a text view. In this article we’re going to build that in SwiftUI, then pull it out into a reusable component you can apply anywhere.

Controlling views using the accelerometer
SWIFTUI SPECIAL EFFECTS

Controlling views using the accelerometer

Reading device motion and orientation is a fast and slightly magical way to incorporate the real world into your apps, and can do a huge amount to add a little spark of delight to your UI. In this article I’m going to show you how easy it is to control SwiftUI layouts using the accelerometer, and give you a few ideas for special effects.

Creating a ShapeView to render UIBezierPaths
CUSTOM SWIFTUI COMPONENTS

Creating a ShapeView to render UIBezierPaths

Bezier paths let us draw all sorts of shapes efficiently and smoothly, and with a little work we can bring them into SwiftUI then animate them smooth, and in this article I’m going to walk you through making a very simple ShapeView struct to do just that.

Customizing Toggle using ToggleStyle
INTERMEDIATE SWIFTUI

Customizing Toggle using ToggleStyle

Most of the time the built-in iOS controls are great, but sometimes you want something just a little different. In this article I’m going to walk you through how you can take complete control over the way toggle switches work in SwiftUI, providing custom rendering and interactions.

Understanding generics – part 2
INTERMEDIATE SWIFT

Understanding generics – part 2

In this second tutorial on generics, we’re going to explore creating several different generic types, look at extending generics, and look at how we can apply our generics knowledge to create property wrappers.

Creating a LongPressButton to trigger after delay
CUSTOM SWIFTUI COMPONENTS

Creating a LongPressButton to trigger after delay

In this article I’m going to walk you through building a LongPressButton with SwiftUI, which will requires users to press and hold for a second before it’s triggered.

Customizing ProgressView using ProgressViewStyle
INTERMEDIATE SWIFTUI

Customizing ProgressView using ProgressViewStyle

SwiftUI’s ProgressView gives us control over showing determinate or indeterminate progress, but it’s a bit dull – just a thin line and an activity spinner. Fortunately, we also get the ProgressViewStyle protocol so we can build entirely custom progress views, and in this article I’ll show you how it’s done.

Handling names correctly
MAKING THE MOST OF FOUNDATION

Handling names correctly

There are lots of UI mistakes we can make in programming, but unless our bugs actually get in the way of functionality most users don’t care that much. But there is one exception, and we’re going to look at it here: in this article I’ll show you how to handle names correctly – the most personal data of all.

The ultimate Box type
INTERMEDIATE SWIFT

The ultimate Box type

Boxing allows us to wrap up a struct in a class, to make it easy to share in several places. I’ve touched on boxing briefly previously, but here I want to take the concept much further to add useful protocol conformances that really powerful up its usefulness.

Remaking the Tips app
REMAKING APPS

Remaking the Tips app

In this article we’re going to look at how to rebuild the Tips app using SwiftUI, including how to make scrolling tabs of content, how to get a parallax scrolling effect, and more.

Advanced button customization using ButtonStyle
INTERMEDIATE SWIFTUI

Advanced button customization using ButtonStyle

Previously we looked at how to create basic button styles that unify your app’s styling efficiently. In this follow-on article we’re going to explore three completely different button styles that show off just what SwiftUI is capable of: glossy marble buttons, classic fantasy buttons, and sci-fi buttons.

Why opaque return types are so important
ADVANCED SWIFT

Why opaque return types are so important

Opaque return types are a powerful feature in Swift, and are also critically important for writing SwiftUI. In this article I’ll be explaining how they work, and why they give us more power than returning a simple protocol.

Link copied to your pasteboard.