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Aside from all the massive options akin to AsyncImage and searchable, the iOS 15 SDK additionally launched some minor enhancements to streamline the event of iOS apps. On this tutorial, we’ll present you methods to use Markdown in SwiftUI’s Textual content view.
What’s Markdown
I assume you will have used Markdown earlier than, however in case if in case you have no thought what it’s, let me offer you a fast walkthrough. Created by John Gruber, Markdown is a light-weight markup language for including formatting to a plain textual content doc. Most significantly, it permits you to simply flip the formatted textual content into an HTML net web page (or different kinds of paperwork). I’ve used Markdown for years to put in writing my programming books. Due to its plain textual content nature, you don’t want any particular instruments to put in writing Markdown, only a plain textual content editor is sweet sufficient.
Markdown is lifeless easy to be taught and use. Let me present you a couple of examples. To daring some textual content, all it’s worthwhile to do is enclose the textual content in double asterisks (**):
Equally, to make the textual content italic, you utilize a single asterisk like this:
You’ll be able to cross the textual content like this:
To format the textual content as a heading, you write the Markdown syntax like this:
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# Heading 1 (Largest) ## Heading 2 ### Heading 3 #### Heading 4 ##### Heading 5 ###### Heading 6 (Smallest) |
To focus on a command or a line of code, you may enclose the textual content with single backticks. Right here is an instance:
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To present all processess working on macOS, you can sort `ps aux` in Terminal. |
You’ll be able to simply embed hyperlinks in a doc by wrapping hyperlink textual content in sq. brackets (i.e. []) after which specify the URL inside parentheses. Right here is an instance:
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The tutorial is supplied by [AppCoda](https://www.appcoda.com). |
When the textual content is rendered in HTML, it should present a hyperlink.
The above are only a few examples of the Markdown syntax. For particulars, you may check with this doc on GitHub.
Utilizing Markdown in SwiftUI
I imagine you must have some concepts about Markdown. So, how are you going to use Markdown in SwiftUI improvement? Ranging from iOS 15, SwiftUI comes with built-in help for this markup language. You’ll be able to simply format textual content utilizing Markdown with the Textual content view.
To do this, all it’s worthwhile to do is cross the Textual content view with textual content in Markdown syntax. Here’s a pattern code snippet:
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VStack(alignment: .main) { Textual content(“**Textual content in daring**”) Textual content(“*Textual content in italic*”) Textual content(“~This textual content is crossed out~”) Textual content(“`This line of code`”) Textual content(“You’ll be able to [click this link](https://www.appcoda.com) to go to the web site.”) } |
For those who enter the code in your SwiftUI challenge, Xcode will routinely format the textual content.
In fact, you may format a paragraph of textual content utilizing Markdown. Right here is one other instance:
Working with AttributedString
AttributedString in iOS 15, which is the Swift model of NSAttributedString, additionally has a built-in help of Markdown. To create an attributed string in Markdown, you write the code like this:
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do { var textual content = var textual content = attempt AttributedString(markdown: “**This textual content is daring**”) } catch { print(“Did not create the attributed textual content”) } |
And, you may combine Markdown and apply your most popular styling to the textual content. Right here is an instance that highlights some textual content with numerous colours:
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
var attributedString: AttributedString = { do { var textual content = attempt AttributedString(markdown: “`SwiftUI` has developed a lot in these two years. **Apple has packed much more options and introduced extra UI elements to the `SwiftUI` framework**, which comes alongside with *Xcode 13*. It simply takes UI improvement on iOS, iPadOS, and macOS to the **subsequent stage**.”)
if let vary = textual content.vary(of: “Apple”) { textual content[range].backgroundColor = .yellow }
if let vary = textual content.vary(of: “iPadOS”) { textual content[range].backgroundColor = .purple textual content[range].foregroundColor = .white }
return textual content
} catch { return “” } }() |
SwiftUI’s textual content part has a built-in help for AttributedString. You’ll be able to merely cross it to the Textual content view for rendering.
Present Limitations
The present model of Swift doesn’t help all of the Markdown syntax. For instance, it will probably’t render heading, numbered checklist, and picture. Hopefully, Apple will present additional enchancment in future updates of SwiftUI.
Founding father of AppCoda. Creator of a number of iOS programming books together with Starting iOS Programming with Swift and Mastering SwiftUI. iOS App Developer and Blogger. Observe me at Fb, Twitter and Google+.
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