Mobile Developer Tips » Debugging

Tracking Down Exception Errors With objc_exception_throw

John Muchow — Mon, 30 Apr 2012 06:27:00 +0000

Tracking Down Exception Errors With objc_exception_throw is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved When an application throws an exception, there is debug information shown in the console – below is the output in the console for an NSInvalidArgumentException: Although helpful, depending on the size of your application, it may take quite [...] Related posts:

Remove Debug Code For Release Build

John Muchow — Tue, 24 Apr 2012 02:31:20 +0000

Remove Debug Code For Release Build is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved When it’s time to remove debug code and log messasges from your application, it’s straight forward if you follow a few simple steps during development. First, wrap debugging code in a block similar to the following: #ifdef DEBUG [...] Related posts:

Debugging with GDB: Print-Object and UIView recursiveDescription

John Muchow — Mon, 30 Jan 2012 07:09:56 +0000

Debugging with GDB: Print-Object and UIView recursiveDescription is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In the post Debugging with GDB: Introduction to Commands, Print and Print-Object I covered the basics of the command line inteface in GDB. In this post I’ll show you a trick to print out the entire view [...] Related posts:

Updated: Tracking Down EXC_BAD_ACCESS Errors with NSZombieEnabled in Xcode 4

John Muchow — Fri, 27 Jan 2012 03:04:16 +0000

Updated: Tracking Down EXC_BAD_ACCESS Errors with NSZombieEnabled in Xcode 4 is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In a previous post Tracking Down EXC_BAD_ACCESS Errors with NSZombieEnabled I explained how the environment variable NSZombieEnabled can help track down EXC_BAD_ACCESS errors, which are typically caused by attempting to access objects that have [...] Related posts:

Debugging with GDB: Introduction to Commands, Print and Print-Object

John Muchow — Tue, 10 Jan 2012 08:01:40 +0000

Debugging with GDB: Introduction to Commands, Print and Print-Object is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved GDB is the debugging system built into Xcode. Xcode handles much of the interaction with GDB to provide support for breakpoints, stepping through/over code, wowever, GBD also provides a command line that you can use [...] Related posts:

Objective-C Expressions for Debugging

John Muchow — Thu, 01 Dec 2011 12:43:41 +0000

Objective-C Expressions for Debugging is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In a previous post I wrote about preprocessor macros that provide filename, line number and function information to aid in debugging. A short example follows: - (void)buttonPressed:(UIButton *)button { NSLog(@"\n Function: %s\n Pretty function: %s\n Line: %d\n File: %s\n Object: [...] Related posts:

Xcode 4 : Debug Breakpoints, Conditions and Actions

John Muchow — Wed, 09 Nov 2011 09:11:38 +0000

Xcode 4 : Debug Breakpoints, Conditions and Actions is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved I recently bumped into a few new debugging features in Xcode 4 while looking at breakpoint options. To show how this works, let’s look at a small block of code where I’ve already set a breakpoint [...] Related posts:

Locating Crash Reports

John Muchow — Mon, 19 Sep 2011 06:21:57 +0000

Locating Crash Reports is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved If an applications crashs while running on a device, iOS logs the errors and creates a crash report. The report includes specifics about the OS version, date/time, the exception type, a stack trace, among other details. Below is a partial listing [...] Related posts:

Accessing iTunes Reports When iTunes is Closed

Share and Copy Files Between an App and iTunes

John Muchow — Mon, 12 Sep 2011 07:27:50 +0000

Share and Copy Files Between an App and iTunes is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved You can share files between an iOS app and your Mac using file sharing via iTunes. Using file sharing the contents of your application’s Documents directory is available in iTunes. This also works the other [...] Related posts:

Exceptions – Try, Catch and Finally

John Muchow — Mon, 15 Aug 2011 09:04:02 +0000

Exceptions – Try, Catch and Finally is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved You won’t find exceptions used as frequently in Objective-C as in other languages. However, try/catch/finally blocks can be useful to capture errors that may otherwise cause an app to fail. In the example below, I allocate an array, [...] Related posts: