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

Camera – smile please!

The camera is probably the most widely used feature of an iOS device. In this section, we will cover the most frequently used Camera events by creating an application that will allow us to take a picture using the Camera device and to select a picture from the Gallery.

An iPhone implements image selection through a picker that allows us to get images from different sources, such as Camera Roll or Photo Library. The UIImagePickerController class provides basic, customizable user interfaces (UIs) for taking pictures and videos, also providing the user with some simple editing capabilities for newly captured media.

The role and appearance of a UIImagePickerController class depends on the value of sourceType assigned to it. There are three ways to choose the source of an image, as follows:

  • Choose from Camera:

    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
  • Choose from any folder in Gallery:

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary...