Book Image

NativeScript for Angular Mobile Development

By : Nathan Walker, Nathanael J. Anderson
Book Image

NativeScript for Angular Mobile Development

By: Nathan Walker, Nathanael J. Anderson

Overview of this book

NativeScript is an open source framework that is built by Progress in order to build truly native mobile apps with TypeScript, JavaScript or just Angular which is an open source framework built by Google that offers declarative templates, dependency injection, and fully featured modules to build rich applications. Angular’s versatile view handling architecture allows your views to be rendered as highly performant UI components native to iOS and Android mobile platforms. This decoupling of the view rendering layer in Angular combined with the power of native APIs with NativeScript have together created the powerful and exciting technology stack of NativeScript for Angular. This book focuses on the key concepts that you will need to know to build a NativeScript for Angular mobile app for iOS and Android. We’ll build a fun multitrack recording studio app, touching on powerful key concepts from both technologies that you may need to know when you start building an app of your own. The structure of the book takes the reader from a void to a deployed app on both the App Store and Google Play, serving as a reference guide and valuable tips/tricks handbook. By the end of this book, you’ll know majority of key concepts needed to build a successful NativeScript for Angular app.
Table of Contents (24 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback
Integration Testing with Appium

Chapter 8. Building an Audio Recorder

Recording audio is the most performance-intensive operation our app must handle. It is also the one feature where having access to native APIs will be the most rewarding. We want our users to be able to record with the lowest latency possible for the mobile device in order to achieve the highest fidelity of sound. Additionally, this recording should optionally happen over the top of an existing mix of pre-recorded tracks all playing in sync .

Since this phase of our app development will dive the deepest into platform-specific native APIs, we will split our implementations into two phases. We will first build out the iOS-specific details of the recording features, followed by Android.

In this chapter, we will cover the following:

  • Building a feature rich cross-platform audio recorder for iOS and Android with a consistent API
  • Integrating iOS framework libraries, such as AudioKit (, which was built entirely with Swift
  • How to convert Swift/Objective...