Packt An iOS Developers Guide to SwiftUI

Design and build beautiful apps quickly and easily with minimum code This book teaches you about SwiftUI, a multiplatform declarative user interface framework that can be used to program all Apple devices, currently including Mac, iPhone, iPad, Apple TV, Apple Watch, and Vision Pro. Who this book is for This book is aimed at iOS developers who want to expand their knowledge of adding SwiftUI to their bag of tools and want to progress further in their professional careers. What this book covers Chapter 1, Exploring the Environment – Xcode, Playgrounds, and SwiftUI, is an introduction to the software tools used when working with SwiftUI, the new exciting, efficient, and simple-to-use Apple framework for user interfaces. Chapter 2, Adding Basic UI Elements and Designing Layouts, shows you how to properly refactor view code. Then, it describes how to combine basic views with stacks and control their visual layout. Chapter 3, Adding Interactivity to a SwiftUI View, discusses the conversion from static to dynamic SwiftUI views, with a focus on responsive design, including taps and gestures. This chapter explores mechanisms to enable views to be made interactive. It covers topics such as view creation, interactivity enhancement, property wrappers, limitations of @State, bidirectional bindings, subviews, and the use of @ObservableObject and @StateObject classes. Chapter 4, Iterating Views, Scroll Views, FocusState, Lists, and Scroll View Reader, focuses on showing lists in SwiftUI, through scrollable views such as scroll views or lists. It shows how to handle the visibility of the iOS system keyboard. It introduces NavigationView for view titles and covers iterating views, @ViewBuilder, scroll views, @FocusState for keyboard control, lists, and ScrollViewReader for element positioning within lists or scroll views. Chapter 5, The Art of Displaying Grids, moves on to creating grid structures in SwiftUI. Topics covered include displaying grids in iOS, the grid view, lazy grids, using GridItem for layout control, conditional view formatting, and responding design to device orientation changes.