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  • Display top section of Bar Charts with Swift Charts

    calendar Oct 23, 2022 · 12 min read · bar chart chart swiftui  ·
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    Display top section of Bar Charts with Swift Charts
    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.
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  • Visualise the Matthew Effect with Swift Charts

    calendar Oct 16, 2022 · 16 min read · bar chart chart matthew swiftui  ·
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    Visualise the Matthew Effect with Swift Charts
    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.
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  • Create a circular slider in SwiftUI

    calendar Sep 25, 2022 · 10 min read · slider circle swiftui  ·
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    Create a circular slider in SwiftUI
    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 …
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  • Create a bar chart with SwiftUI Charts in iOS 16

    calendar Sep 11, 2022 · 8 min read · bar chart chart swiftui  ·
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    Create a bar chart with SwiftUI Charts in iOS 16
    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.
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  • Customise a line chart with SwiftUI Charts in iOS 16

    calendar Aug 14, 2022 · 11 min read · line chart Area chart chart swiftui  ·
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    Customise a line chart with SwiftUI Charts in iOS 16
    SwiftUI Charts introduced in iOS 16, can present data in an intuitive visual format and can be created quickly using SwiftUI Charts. This article demonstrates a couple of ways to customise a line chart and combine with an area chart to present data.
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  • Create a line chart with SwiftUI Charts in iOS 16

    calendar Aug 7, 2022 · 8 min read · line chart chart swiftui  ·
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    Create a line chart with SwiftUI Charts in iOS 16
    Apple introduced SwiftUI Charts at WWWDC 2022, which makes it incredibly easy to create charts within SwiftUI views. Charts are a great way of presenting visual data in a rich format that is easy to understand. This article shows how to easily create a line chart with so much less code than was previously used to …
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  • Save an image to MacOS file system with SwiftUI

    calendar May 22, 2022 · 7 min read · NSSavePanel image file macos swiftui  ·
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    Save an image to MacOS file system with SwiftUI
    SwiftUI does not have a control to present an open/save dialog to the user to allow saving files to the macOS filesystem. One could build such a view from scratch, but it is easier to use NSSavePanel from AppKit. This article demonstrates how to use NSSavePanel to get the URL for the file to be saved and use …
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  • Use Dependency Injection to Unit Test a ViewModel in Swift

    calendar Apr 17, 2022 · 8 min read · dependency injection di unit test swiftui  ·
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    Use Dependency Injection to Unit Test a ViewModel in Swift
    Dependency Injection is a technique to pass in one or more dependent object to another object. This article will build on the Weather App to pass in the weather service to the weather ViewModel at initialisation. This will allow the use of a mock weather service to test the ViewModel in unit tests without requiring any …
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  • Consistent Swift style in Xcode with SwiftLint

    calendar Mar 27, 2022 · 26 min read · swiftlint style swiftui  ·
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    Consistent Swift style in Xcode with SwiftLint
    Code style can be a controversial topic and lead to some passionate debates between developers. The use of a tool to enforce a set of rules on style can be very helpful to avoid contentious arguments and ensure the code is consistent throughout a project. SwiftLint can easily be incorporated into Xcode projects to flag …
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  • Display loading screen when fetching data in Swift

    calendar Mar 20, 2022 · 7 min read · progressview async await swiftui  ·
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    Display loading screen when fetching data in Swift
    Last week, we retrieved weather data from Open Weather API to demonstrate how to parse JSON data. The weather data is retrieved asynchronously, which may result in a delay before the UI is updated. This article shows how to display a progress view while the data is being fetched, to provide feedback that something is …
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Eric Callanan

Lifelong learner, Software Engineering Manager, Passionate, Curious
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SWIFTUI 74 PYTHON 28 PATH 13 SWIFT 13 PANDAS 12 BAR-CHART 10 MVVM 8 MATPLOTLIB 7 PLOTLY 7 ANIMATION 6 CANVAS 6 CHART 6 COVID-19 5 SHAPE 5
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