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<p>Automatically use different log levels per xcode configuration.</p>
<h1 id='xcode-4' class='heading'>Xcode 4+</h1>
<p>Starting with Xcode 4, the <code>DEBUG</code> preprocessor macro is automatically set when building for debug (as opposed to release). So you can use this to automatically get different log levels depending upon your current build configuration.</p>
<pre class="highlight objective_c"><code><span class="cp">#ifdef DEBUG
</span> <span class="k">static</span> <span class="k">const</span> <span class="n">DDLogLevel</span> <span class="n">ddLogLevel</span> <span class="o">=</span> <span class="n">DDLogLevelVerbose</span><span class="p">;</span>
<span class="cp">#else
</span> <span class="k">static</span> <span class="k">const</span> <span class="n">DDLogLevel</span> <span class="n">ddLogLevel</span> <span class="o">=</span> <span class="n">DDLogLevelWarning</span><span class="p">;</span>
<span class="cp">#endif
</span></code></pre>
<p>Nothing else is needed. (No changes required of your xcode project.) If the DEBUG macro isn’t set in your project, it likely means you originally created the project with Xcode 3 (or before the DEBUG macro became standard). In that case, read on.</p>
<h1 id='xcode-3' class='heading'>Xcode 3</h1>
<p>Xcode has powerful configuration tools that we can tap into to automatically use different log levels depending on whether we’re compiling in Debug vs Release mode.</p>
<p>When we’re done we’ll be able to have code like this:</p>
<pre class="highlight objective_c"><code><span class="cp">#ifdef CONFIGURATION_DEBUG
</span> <span class="k">static</span> <span class="k">const</span> <span class="n">DDLogLevel</span> <span class="n">ddLogLevel</span> <span class="o">=</span> <span class="n">DDLogLevelVerbose</span><span class="p">;</span>
<span class="cp">#else
</span> <span class="k">static</span> <span class="k">const</span> <span class="n">DDLogLevel</span> <span class="n">ddLogLevel</span> <span class="o">=</span> <span class="n">DDLogLevelWarning</span><span class="p">;</span>
<span class="cp">#endif
</span></code></pre>
<h3 id='details' class='heading'>Details</h3>
<p>Open your Xcode project and go to:</p>
<p>Project -> Edit <strong>Project</strong> Settings</p>
<p>Now change the configuration to <strong>Debug Configuration</strong>.</p>
<p>Filter on “preprocessor” so you can find the <strong>Preprocessor Macros Not Used In Precompilation</strong> setting.</p>
<p>Now add a <strong>CONFIGURATION_DEBUG</strong> value to this setting.</p>
<p>Your project settings should look like this:</p>
<p><a href="http://www.flickr.com/photos/100714763@N06/9575919913/" title="CocoaLumberjack_xcode1 by robbiehanson, on Flickr"><img src="http://farm8.staticflickr.com/7410/9575919913_4655514922_o.png" width="653" height="673" alt="CocoaLumberjack_xcode1"></a></p>
<p>Next, switch the configuration to <strong>Release Configuration</strong>.</p>
<p>Now add a <strong>CONFIGURATION_RELEASE</strong> to the <strong>Preprocessor Macros Not Used In Precompilation</strong> setting.</p>
<p>Your project settings should look like this:</p>
<p><a href="http://www.flickr.com/photos/100714763@N06/9575920131/" title="CocoaLumberjack_xcode2 by robbiehanson, on Flickr"><img src="http://farm4.staticflickr.com/3808/9575920131_52625d8f01_o.png" width="653" height="673" alt="CocoaLumberjack_xcode2"></a></p>
<p>And that’s all there is to it. You’re done!</p>
<p>And this isn’t limited to just logging.
You can use the <code>#ifdef CONFIGURATION_DEBUG</code> anywhere you want in your project if you feel the need to differentiate something between your debug and release builds.</p>
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