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

Adding buttons to NavigationView and activating navigation programmatically

As in UIKit, it is possible to add custom buttons to NavigationView. This is achieved by using the .toolbar modifier and placing a ToolbarItem inside it.

If you don’t specify the placement, for left-to-right languages, the default placement of .ToolbarItem will be positioned on the right, and it will switch to the left for right-to-left languages.

Typically, you will add a Button to ToolbarItem. But if you are on iOS 16, NavigationView can be substituted with NavigationStack, without changing anything else.

The following code example illustrates how to add buttons to a NavigationView, specifying the placement explicitly in both cases:

import SwiftUI
struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("Example of adding tabbaritems...