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)
Section 1: Swift
Section 2:Design
Section 3:Code
Section 4:Features


In this chapter, you completed the implementation of the Photo Filter screen. You imported FilterData.plist, a .plist file containing the filters you want to use, created the FilterItem class to store filter data, and created the FilterManager data manager class to read the .plist file and populate an array of FilterItem instances. Next, you created a protocol, ImageFiltering, with a method to apply filters to images. Then, you created the FilterCell and PhotoFilterViewController classes in order to manage the collection view cells and the Photo Filter screen. After that you made the PhotoFilterViewController class adopt the UIImagePickerDelegate protocol, and added methods so that you can use photos from the camera or photo library in your app. Finally, you added code to PhotoFilterViewController to apply a selected filter to a picture.

You are now able to write your own apps that import photos from your camera or photo library and apply filters to them.

Note that the...