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

Bidirectional binding with Picker

In this section, we will use Picker and a bound state variable to allow the user to choose one color from a group of five choices. Take a look at the following example:

import SwiftUI
struct StateWithPicker: View {
    private let colors = ["White", "Red", "Blue", "Green", "Black"]
    @State private var color = "White"
    var body: some View {        VStack(spacing: 15) {
        Spacer()
        Text("Choose your color by name")
        Picker("Name", selection: $color) {                ForEach(colors, id: \.self) { name in        ...