Category: SwiftUI

A common requirement when developing iOS apps is to store data in some form of structured database. One option is to directly manage data using an embedded database system such as SQLite. While this is a perfectly good approach for working with SQLite in many cases, it does require knowledge of SQL and can lead…

The previous chapter introduced the DocumentGroup scene type provided with SwiftUI and explored the architecture that allows adding document browsing and management to apps. This chapter will demonstrate how to take the standard Xcode Multiplatform Document App template and modify it to work with image files instead of plain text documents. Upon completion of the…

The chapter entitled SwiftUI Architecture introduced the concept of SwiftUI scenes and explained that the SwiftUI framework, in addition to allowing you to build your own scenes, also includes two pre-built scene types in the form of WindowGroup and DocumentGroup. So far, the examples in this book have made exclusive use of the WindowGroup scene.…

The SwiftUI ProgressView, as the name suggests, provides a way to visually indicate the progress of a task within an app. An app might, for example, need to display a progress bar while downloading a large file. This chapter will work through an example project demonstrating how to implement a ProgressView-based interface in a SwiftUI…

The term gesture is used to describe an interaction between the touch screen and the user which can be detected and used to trigger an event in the app. Drags, taps, double taps, pinching, rotation motions and long presses are all considered to be gestures in SwiftUI. The goal of this chapter is to explore…

This chapter is intended to provide an overview and examples of animating views and implementing transitions within a SwiftUI app. Animation can take a variety of forms including the rotation, scaling and motion of a view on the screen. Transitions, on the other hand, define how a view will appear as it is added to…

The goal of this chapter is to introduce SwiftUI 2D drawing techniques. In addition to a group of built-in shape and gradient drawing options, SwiftUI also allows custom drawing to be performed by creating entirely new views that conform to the Shape and Path protocols. Creating the DrawDemo Project Launch Xcode and select the option…

A context menu in SwiftUI is a menu of options that appears when the user performs a long press over a view on which a menu has been configured. Each menu item will typically contain a Button view configured to perform an action when selected, together with a Text view and an optional Image view.…

The SwiftUI TabView component allows the user to navigate between different child views either by selecting tab items located in a tab bar or, when using the page view tab style, by making swiping motions. This chapter will demonstrate how to implement a TabView based interface in a SwiftUI app. An Overview of SwiftUI TabView…

The previous chapter introduced LazyHGrid, LazyVGrid, and GridItem views and explored how they can be used to create scrollable multicolumn layouts. While these views can handle large numbers of rows, they lack flexibility, particularly in grid cell arrangement and positioning. In this chapter, we will work with two grid layout views (Grid and GridRow) that…