Book Image

Mac Application Development by Example: Beginner's Guide

By : Robert Wiebe
Book Image

Mac Application Development by Example: Beginner's Guide

By: Robert Wiebe

Overview of this book

It's never been more important to have the ability to develop an App for Mac OS X. Whether it's a System Preference, a business app that accesses information in the Cloud, or an application that uses multi-touch or uses a camera, you will have a solid foundation in app development to get the job done.Mac Application Development by Example takes you through all the aspects of using the Xcode development tool to produce complete working apps that cover a broad range of topics. This comprehensive book on developing applications covers everything a beginner needs to know and demonstrates the concepts using examples that take advantage of some of the most interesting hardware and software features available.You will discover the fundamental aspects of OS X development while investigating innovative platform features to create a final product which take advantage of the unique aspects of OS X.Learn how to use Xcode tools to create and share Mac OS X apps. Explore numerous OS X features including iCloud, multi-touch trackpad, and the iSight camera.This book provides you with an illustrated and annotated guide to bring your idea to life using fundamental concepts that work on Mac.
Table of Contents (17 chapters)
Mac Application Development by Example Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Time for action – capturing a frame


When a capture session is running, we can add another output object that will be notified each time a new, uncompressed, frame is captured. The output's delegate object can do whatever it wants to do to that captured frame, for example, save it to a file.

  1. Select the iSight Recorder TARGET in the standard editor. In the Build Phases section titled Link Binary With Libraries, add the QuartzCore.framework.

  2. Remember to drag the QuartzCore.framework to the Frameworks folder in the project navigator.

  3. In the file named BTSAppDelegate.h, add a #define for our captured image's width, height, and JPG file extension.

    // Define the image size for pictures
    #define D_BTS_SNAP_WIDTH 640
    #define D_BTS_SNAP_HEIGHT 480
    
    // Define the image type for pictures
    #define D_BTS_SNAP_TYPE @"jpg"
  4. Then add a new @property of type QTCaptureDecompressedVideoOutput. The delegate of the object referenced by this property will receive uncompressed frame data.

    // Use this property to capture...