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 – set a breakpoint


We can add a breakpoint to the BuggyCalc App to cause Xcode to identify the exact line of program code that is causing the index out of range error.

  1. In BuggyCalc, select the filename BTSAppDelegate.m and make sure the value of D_SHOW_DIVIDEBYZERO_BUG is 0 and the value of D_SHOW_INDEXOUTOFRANGE_BUG is 1.

  2. In the Xcode navigator pane, click on the icon to Show the Breakpoint navigator as shown in the following screenshot:

  3. In the Xcode navigator pane, click on the + icon and select the menu item titled Add ExceptionBreakpoint… as shown in the following screenshot:

  4. In the Xcode navigator pane, on the breakpoint options window, select Done to accept the default settings for the exception breakpoint as shown in the following screenshot:

  5. Click on the Run icon again to launch BuggyCalc.

  6. Click on the ÷ button.

What just happened?

When we clicked on ÷ our program misbehaved, just as before, but this time Xcode became the foreground App and indicated the exact line in our...