![]() It might be handy when you provide a complete design system or a UI library. You can create Swift files that contain only previews. I want to mention that you are not limited for creating a preview only inside a Swift file containing a SwiftUI view. If you include more freeform text between the documentation keywords, it will just be flowed into the correct position in Quick Help.Struct ContentView_Previews : PreviewProvider Preview files There are others, but those three are the most useful when you’re just starting out. Third is the Throws keyword, which lets you specify a comma-separated list of the error types that can be thrown by the function: - Throws: workFailed, LoadError.writeFailed Parameter track: The track number to load Parameter album: The name of a Taylor Swift album You can include as many Parameter lines as you have parameters. This lets you specify the name of a parameter and describe what it contains. Returns: A string containing a date formatted as RFC-822 Sponsor Hacking with Swift and reach the world's largest Swift community! Documentation keywordsīeyond using text to describe your functions, Swift lets you add special keywords that get displayed in the Quick Help pane.įirst, the Returns keyword lets you specify what value the caller can expect back when the function runs successfully. This article explores some key statistics from the latest research on the expectations of mobile app users and the results of failing to meet them. SPONSORED Find out how your app’s stability and performance influence your users’ engagement, retention, spending, and perception of your brand. If you’re using Xcode 13 or later, you can use double backticks to produce links inside DocC documentation, like this: Make sure and avoid using ``badFunction()`` unless you enjoy problems. Write **two asterisks** around words to make them bold Write a *single asterisk* around words to make them italic If you want to write a link, (and your link in parentheses) If you need subheadings, use #, #, and so on. and Xcode will renumber them automatically. You can write numbered listed by starting with 1.ġ. * Indent your asterisks to create sublistsġ. * You can write bullets by starting with an asterisk then a space. In this text you can use a selection of Markdown formatting, as shown below: Place text in `backticks` to mark code on your keyboard these usually share a key with tilde, ~. Markdown comments start with /** and end with */, like this: /** These special comments are placed before your functions and classes and are used to show information in the Quick Help pane, as well as in the autocomplete popup, and are formatted so that both humans and Xcode can read them. ![]() This documentation is not the same as the regular inline comments you add to particular code. Using specially formatted code comments, you can document what parameters should be passed in, what the return value will contain, any errors that can be thrown, and more. ![]() Swift has special syntax that lets you embed Markdown-formatted text into your source code, which gets parsed by Xcode and displayed in the Quick Help system pane. How to add Markdown comments to your code
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