Book Image

Appcelerator Titanium Smartphone App Development Cookbook Second Edition

Book Image

Appcelerator Titanium Smartphone App Development Cookbook Second Edition

Overview of this book

This book will take you through the process of building cross-platform, native UI applications for the mobile from scratch. You will learn how to develop apps, how to use GPS, cameras and photos and how to build socially connected apps. You will also learn how to package them for submission to the App Store and Google Play. This cookbook takes a pragmatic approach to creating applications in JavaScript from putting together basic UIs, to handling events and implementation of third party services such as Twitter, Facebook and Push notifications. The book shows you how to integrate datasources and server APIs, and how to use local databases. The topics covered will guide you to use Appcelerator Studio tools for all the mobile features such as Geolocation, Accelerometer, animation and more. You’ll also learn about Alloy, the Appcelerator MVC framework for rapid app development, and how to transfer data between applications using URLSchemes, enabling other developers to access and launch specific parts of your app. Finally, you will learn how to register developer accounts and publish your very own applications on the App Store and Google Play.
Table of Contents (21 chapters)
Appcelerator Titanium Smartphone App Development Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Obtaining the device's screen dimensions


Before iPhone 4, developers were lucky to have to work with just one resolution—320 x 480 pixels. When iPhone 4 arrived, it came with a retina screen. This effectively doubled the resolution, while allowing developers to lay out apps with non-retina dimensions.

So, for example, if you wanted to position something in the middle the screen, you would usually specify 160 pixels. On an iPhone 4, this would actually be 320 pixels. iOS would take care of the positioning based on whether you were using a retina or non-retina device.

When iPhone 5 was released, the effective non-retina resolution changed to 320 x 568 pixels. Again, this was manageable because of the way iOS handled the screen densities, but also because it effectively made the screen taller.

All this changed yet again with the release of iPhone 6 and 6 Plus. Apple introduced new non-retina resolutions of 375 x 667 pixels for iPhone 6 and 540 x 960 pixels for iPhone 6 Plus. Suddenly, iPhone developers...