The async/await syntax, introduced in Swift 5.5, allows a readable way to write asynchronous code. Asynchronous programming can improve performance of an app, but it is important to cancel unneeded tasks to ensure unwanted background tasks do not interfere with the app. This article demonstrates how to cancel a task …
Read More

The async/await syntax was introduced in Swift 5.5 with Meet async/await in Swift in WWDC 2021. It is a more readable way to write asynchronous code and is easier to understand than dispatch queues and callback functions. The async/await syntax is similar to those used in other programming languages like C# or …
Read More

The Swift standard library provides an ArraySlice to work with a subset of a larger collection without the overhead of making a copy of the original collection. Retrieving the first few elements of a collection can be achieved using the one-sided range operator, but is safer to use the prefix method without having to …
Read More

Apple introduced SwiftUI Charts at WWWDC 2022, which makes it incredibly easy to create charts within SwiftUI views. The default chart presents the entire data in the chart plot regardless of how much data is available. It can be beneficial to show more details on a chart and add the ability to scroll through the …
Read More

Apple introduced NavigationStack and NavigationSplitView at WWWDC 2022 to replace NavigationView, which has been deprecated. The documentation for NavigationSplitView includes sample code, but the code does not work as it is missing model data. Here is some model data to allow the sample code in the documentation to …
Read More

There are multiple ways to define colors in code. The most commonly used method is to specify values for the three primary colors - red, green and blue (RGB). This article explores the use of an alternative mechanism by specifying values for hue, saturation and brightness (HSB). The HSB properties can be used in a more …
Read More

There are times when data in a bar chart has similar values for a number of the bars and it can be difficult to see the differences. One option is to zoom in on the top section of the bar chart. This article investigates a number of options and identifies the best approach for this in Swift Charts.
Read More

I came across the Matthew effect recently, which struck me as very unfair so I wondered if I could reproduce the results demonstrated. This article outlines the Swift code for an app to test the redistribution of coins in a closed population based on random coin tosses between agents in the population.
Read More

A Slider control is a UI control that allows the user to select a value from within a range of values. In SwiftUI, it is usually presented as a thumb selector on a linear line. There are times when it might be better to present this type of selector as a circle with the thumb moving around the circumference. This …
Read More

At WWWDC 2022, Apple introduced SwiftUI Charts, which makes it easy to create various charts within SwiftUI views. This article demonstrates how to quickly create a bar chart and customise the chart containing multiple sets of data.
Read More