April 2020
Beginner
316 pages
8h 20m
English
Content preview from Learn SwiftUI
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Understanding the Preview Provider
PreviewProvider is brand new to Xcode 11 and specifically new to SwiftUI. By creating a struct that conforms to the PreviewProvider protocol (which sits within your SwiftUI class; for example, ContentView.swift), along with a couple of lines of code, Xcode will automatically generate a preview of your SwiftUI View.
As we've seen so far, using the Automatic Preview window is a real treat, but there are a couple of scenarios that we need to be aware of.
So, let's start by stripping back our project a little. While removing the hardcoded values, make the following changes to the struct:
struct ContentView: View { var recipeNames = [String]() var body: some View { VStack { List(recipeNames, id: \.self) { name ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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