Creating a particle system in SwiftUI
In the full episode…
- First steps
- Calculating movement
- Adding scaling and opacity
- Spinning and blending
- Images and animations
- Experimenting with the options
- Challenges
- Further reading
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.
More from Hacking with 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.
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.
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.
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.
INTERMEDIATE SWIFTUI
Basic button customization using ButtonStyle
SwiftUI’s humble Button view is actually capable of doing remarkable things if you take the time to customize it. In this video I’ll be walking you through the ButtonStyle protocol, showing you how we can use it to make great-looking and reusable button effects.
HIGH-PERFORMANCE APPS
Identifying performance hot spots with Time Profiler
Instruments gives us a range of tools for finding performance problems, and in this article we’ll be looking at how the Time Profiler instrument can point out problems in seconds.
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.
NETWORKING
Codable networking with Combine
So much of our job is about downloading JSON data, decoding it using Codable, then presenting it – it’s a core skill. But it’s common to see folks rely on huge libraries such as Alamofire, or get mixed up with URLSession. So, in this article we’ll look at how to rewrite common networking code using Combine, then add some generics to make it truly flexible.
ADVANCED SWIFT
Making the most of optionals – part 2
I already introduced how the internals of optionals work, including how they use conditional conformance and how to avoid infinitely sized structs. In this video I’m going to go further as we look at how our knowledge of Optional can be translated to Result, why it’s so important that optionals are functors and monads, and more.
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.
SWIFTUI SPECIAL EFFECTS
Shadows and glows
SwiftUI gives us a modifier to make simple shadows, but if you want something more advanced such as inner shadows or glows, you need to do extra work. In this article I’ll show you how to get both those effects and more in a customizable, flexible way.
NETWORKING
Uploading Codable data
In a previous article we already looked at a great way to download data using Combine, but in this article we’re going to examine the other side of the problem: uploading Codable data. Apple’s API here is a little gnarly, so I’m going to show you how to wrap it in a neat container using generics and Result.
CUSTOM SWIFTUI COMPONENTS
Creating a StretchingHeader that sticks to the top of a view
When users scroll beyond the top of a scroll view the default behavior is to show some empty space, but many apps prefer to show a stretchy header area instead. In this article I’ll show you how to build that SwiftUI, making an image that stays fixed to the top no matter what.
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.
ADVANCED SWIFT
Making the most of optionals
Swift’s optionals are implemented as simple enums, with just a little compiler magic sprinkled around as syntactic sugar. However, they do much more than people realize, and in this article I’m going to demonstrate some of their power features that can really help you write better code – and blow your mind along the way.
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.
CUSTOM SWIFTUI COMPONENTS
Creating a RemoteImage to load images from the web
Just like UIKit before it, SwiftUI doesn’t come with built-in support for loading remote images, which makes it hard to get data from the internet. In this article I’ll show you how you can build a custom view that can fetch image from the internet, while also showing other images for different states.
ADVANCED SWIFT
Existentials and type erasure – part 2
In the first part of this tutorial we looked at the underlying problem that type erasure is trying to solve, and tried out Swift’s approach using AnySequence. In this second part we’re going to adapt Swift’s own solution to get real type erasure for our own code.
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.
DATA STRUCTURES
Queues and deques
Now that we’ve covered stacks and linked lists, queues and deques ought to be easier. In this article we’ll build both data structures in just a few lines of Swift, then explore interesting additions such as contains().