Book Image

An iOS Developer's Guide to SwiftUI

By : Michele Fadda
Book Image

An iOS Developer's Guide to SwiftUI

By: Michele Fadda

Overview of this book

– SwiftUI transforms Apple Platform app development with intuitive Swift code for seamless UI design. – Explore SwiftUI's declarative programming: define what the app should look like and do, while the OS handles the heavy lifting. – Hands-on approach covers SwiftUI fundamentals and often-omitted parts in introductory guides. – Progress from creating views and modifiers to intricate, responsive UIs and advanced techniques for complex apps. – Focus on new features in asynchronous programming and architecture patterns for efficient, modern app design. – Learn UIKit and SwiftUI integration, plus how to run tests for SwiftUI applications. – Gain confidence to harness SwiftUI's full potential for building professional-grade apps across Apple devices.
Table of Contents (25 chapters)
Free Chapter
1
Part 1: Simple Views
5
Part 2: Scrollable Views
8
Part 3: SwiftUI Navigation
11
Part 4: Graphics and Animation
14
Part 5: App Architecture
17
Part 6: Beyond Basics

Lazy grids

If you need a way to display larger grids containing a vast number of elements, you need lazy grids. Lazy grids come in two varieties: LazyHGrid (horizontal) or LazyVGrid (vertical), depending on which direction you want to scroll. In order for the grid to scroll, you will need to place the grid inside ScrollView:

import SwiftUI
struct ContentView: View {
    var body: some View {
        ScrollView {
                    LazyVGrid(columns: [GridItem(.flexible()),GridItem(.flexible()),GridItem(.flexible()),GridItem(.flexible()),]) {
                        ForEach(1...300, id: \.self) { I in
                 &...