Book Image

RubyMotion iOS Development Essentials

By : Abhishek Nalwaya, Akshat Paul
Book Image

RubyMotion iOS Development Essentials

By: Abhishek Nalwaya, Akshat Paul

Overview of this book

RubyMotion is a revolutionary toolchain for iOS app development. With RubyMotion, you can quickly develop and test native iOS apps for the iPhone and iPad, combining the expressiveness and simplicity of Ruby with the power of the iOS SDK. "RubyMotion iOS Development Essentials" is a hands-on guide for developing iOS apps using RubyMotion. With RubyMotion, you can eliminate the complexity and confusion associated with the development of iOS applications using Objective-C. We'll begin from scratch. Starting by installing RubyMotion, we'll build ourselves up to developing an app that uses the various device capabilities iOS has to offer. What's more, we'll even learn how to launch your app on the App Store! We'll also learn to use iOS SDK classes to create application views. Discover how to use the camera, geolocation, gestures, and other device capabilities to create engaging, interactive apps. We'll develop stunning user interfaces faster with the XCode interface builder and make web apps by using WebView. We'll then augment applications with RubyMotion gems, doing more by writing less code and learn how to write test cases for RubyMotion projects. Finally, we'll understand the app submission process to push your app to Apple's App Store With "RubyMotion iOS Development Essentials", we will learn how to create iOS apps with ease. At the end of each chapter we will have a tangible and running app, which utilizes the concepts we have learnt in that chapter.
Table of Contents (19 chapters)
RubyMotion iOS Development Essentials
About the Authors
About the Reviewers

Debugger – catch your mistakes!

A typical debugger provides the ability to halt when specific conditions are encountered. It also offers sophisticated functions, such as running a program step by step, breaking or pausing the program for an examination based on breakpoints, and tracking the values of the variables at that state. RubyMotion Version 1.24 and above support debugging using GDB: the GNU project debugger (

The RubyMotion debugger provides the following inbuilt debugging facilities:

  • It stops the program at a specific line

  • It examines the problem when the program has stopped

  • It checks the value for the variables at a specific breakpoint


    The RubyMotion compiler implements the DWARF debugging format's metadata for the Ruby language. This allows external programs, such as the debugger in our case, to retrieve source-level information about the RubyMotion application. The metadata is saved under a .dSYM bundle file at the same level as the .app bundle...