With each new version of iOS, Apple introduces new SwiftUI features to add new features and plug holes in the framework. This article provides a solution for using new view modifiers that ship with new iOS versions--without raising the app's minimum iOS target setting. What are View Modifiers If you've used SwiftUI …

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How developers can distribute and monetize applications has been evolving quickly over this last year. Some of these changes have been in response to government or court mandates in various countries, but others appear to have been prompted by Apple itself. This week’s announcement of a new Unlisted App Distribution …

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SwiftUI Preview is a fantastic piece of development tooling to quickly iterate UI designs in Xcode. But sometimes the code in your view just doesn't work--or worse it crashes the preview engine. How can we work around this issue? I ran into a Preview crash issue in a SwiftUI view containing a Sign in with Apple button. …

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This post is part two of a series targeted at helping mobile app developers build their own BLE Peripherals using inexpensive ESP32 hardware in less than 100 lines of code. This can help to more fully understand the BLE protocol. If you’re an iOS developer who would like to build their own BLE Peripherals for learning …

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This post is part one of a series targeted at helping mobile app developers build their own BLE Peripherals using inexpensive ESP32 hardware in less than 100 lines of code. This can help to more fully understand the BLE protocol. If you’re an iOS developer who would like to build their own BLE Peripherals for learning …

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Beginning in iOS 15 and macOS 13, Swift developers can begin using the Swift async/await syntax to to suspend and resume processing while waiting for long-running work to complete. This post walks through the process to upgrade a set of nested API calls from the familiar closure syntax to the new and improved Swift …

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SwiftUI uses declarative UI programming, where Views have immutable state, changing automatically as the data state they depend on changes. This is a mindset change for most iOS/macOS developers: instead of changing the UI with a “command and control” MVC mindset, data state changes indirectly change the UI. But how …

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Many mobile applications incorporate remote web pages, either as passive (static) content — or as in this case as integral parts of the UI. Using the WebKit/WKWebView techniques presented here, your native apps can be better integrated with web content and provide a superior experience to end-users. Two-way Integration …

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General Notes Closures are reference types Global functions are closures that have names and capture no values Closures are commonly used as callback functions for network API requests The parameter to the .sorted() and .sort() functions accept closures--which illustrates that closures can also be used in …

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Each section below provides a snippet of code that configures a particular DatePicker, followed by the UI component created by iOS and macOS output for the specific component configuration. -- Some SwiftUI styles are not available on both iOS and macOS. For example the Wheel style is iOS only; the Stepper style is …

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