Book Image

iOS 14 Programming for Beginners - Fifth Edition

By : Ahmad Sahar
Book Image

iOS 14 Programming for Beginners - Fifth Edition

By: Ahmad Sahar

Overview of this book

If you're looking to work and experiment with powerful iOS 14 features such as widgets and App Clips to create your own apps, this iOS programming guide is for you. The book offers a comprehensive introduction for experienced programmers who are new to iOS, taking you through the entire process of learning the Swift language, writing your own apps, and publishing them on the App Store. Fully updated to cover the new iOS 14 features, along with Xcode 12 and Swift 5.3, this fifth edition of iOS 14 Programming for Beginners starts with an introduction to the Swift programming language and shows you how to accomplish common programming tasks with it. You'll then start building the user interface (UI) of a complete real-world app using the storyboards feature in the latest version of Xcode and implement the code for views, view controllers, data managers, and other aspects of mobile apps. The book will also help you apply iOS 14 features to existing apps and introduce you to SwiftUI, a new way to build apps for all Apple devices. Finally, you’ll set up testers for your app and understand what you need to do to publish your app on the App Store. By the end of this book, you'll not only be well versed in writing and publishing applications, but you’ll also be able to apply your iOS development skills to enhance existing apps.
Table of Contents (31 chapters)
1
Section 1: Swift
10
Section 2:Design
15
Section 3:Code
24
Section 4:Features

Providing timeline entries to your widget

To display information in a widget, you will configure the widget's timeline provider. This generates a timeline consisting of timeline entries. Each entry specifies the date and time at which to update the widget's content. You'll use the MapDataManager class to get restaurant details, create timeline entries for each restaurant, and configure them to be displayed every five minutes. Follow these steps:

  1. Stop your app if it is running. Click the LetsEatWidget.swift file inside the LetsEatWidget folder in the Project navigator. Just like in Chapter 23, Getting Started with SwiftUI, you'll see your widget's code on the left side of the editor, and a canvas containing a preview of the right side.
  2. Click the Resume button to preview the widget in the canvas. It just displays the time at the moment.
  3. Your widget is declared and defined in the LetsEatWidget structure. Modify it as follows:
    @main
    struct LetsEatWidget...