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    copied!<p>In Xcode this is called "Code Sense". And these icons also exist in Xcode 3. These icons are also used in symbol navigation.</p> <p><strong>Red</strong>: macros</p> <ul> <li><img src="https://i.stack.imgur.com/QaGsT.png" alt="#"> = macro (think <code>#define</code>)</li> </ul> <p><strong>Brown</strong>: Core Data / namespace</p> <ul> <li><img src="https://i.stack.imgur.com/a1KfZ.png" alt="C"> = modeled <b>c</b>lass</li> <li><img src="https://i.stack.imgur.com/m216k.png" alt="M"> = modeled <b>m</b>ethod</li> <li><p><img src="https://i.stack.imgur.com/YCx1g.png" alt="P"> = modeled <b>p</b>roperty</p></li> <li><p><img src="https://i.stack.imgur.com/fXDdT.png" alt="N"> = C++ <b>n</b>amespace</p></li> </ul> <p><strong>Orange</strong>: aliased types</p> <ul> <li><img src="https://i.stack.imgur.com/ysYSp.png" alt="C with underscore"> = Objective-C <b>c</b>ategory</li> <li><img src="https://i.stack.imgur.com/9ZQ6S.png" alt="E"> = <b>e</b>num</li> <li><img src="https://i.stack.imgur.com/C6KpQ.png" alt="T"> = <b>t</b>ypedef / <b>t</b>ypealias</li> <li><img src="https://i.stack.imgur.com/GWAyQ.png" alt="Ex"> = Swift <b>ex</b>tension</li> </ul> <p><strong>Green</strong>: variables</p> <ul> <li><img src="https://i.stack.imgur.com/xmRr2.png" alt="B"> = <b>b</b>inding</li> <li><img src="https://i.stack.imgur.com/vLjhf.png" alt="f"> = <b>f</b>unction</li> <li><img src="https://i.stack.imgur.com/4B1DM.png" alt="F"> = <b>f</b>ield</li> <li><img src="https://i.stack.imgur.com/Wz62i.png" alt="K"> = <b>c</b>onstant</li> <li><img src="https://i.stack.imgur.com/sCnZy.png" alt="L"> = <b>l</b>ocal variable</li> <li><img src="https://i.stack.imgur.com/QFrpA.png" alt="O"> = IB<b>O</b>utlet</li> <li><img src="https://i.stack.imgur.com/SMQPu.png" alt="V"> = <b>v</b>ariable (can be ivar, global var, local var, etc.)</li> <li><img src="https://i.stack.imgur.com/MFDy9.png" alt="x"> = parameter (think <em>f(x)</em>)</li> </ul> <p><strong>Blue</strong>: methods</p> <ul> <li><img src="https://i.stack.imgur.com/WRY99.png" alt="A"> = IB<b>A</b>ction</li> <li><img src="https://i.stack.imgur.com/oqYjC.png" alt="M"> = <b>m</b>ethod</li> <li><img src="https://i.stack.imgur.com/VC5Gn.png" alt="P"> = <b>p</b>roperty</li> </ul> <p><strong>Purple</strong>: aggregate types</p> <ul> <li><img src="https://i.stack.imgur.com/tulgF.png" alt="C"> = <b>c</b>lass (Objective-C, Swift or C++)</li> <li><img src="https://i.stack.imgur.com/392Bx.png" alt="CE"> = <b>c</b>lass <b>e</b>xtension</li> <li><img src="https://i.stack.imgur.com/mDLIl.png" alt="Pr"> = Objective-C/Swift <b>pr</b>otocol</li> <li><img src="https://i.stack.imgur.com/zFkHy.png" alt="S"> = <b>s</b>truct</li> <li><img src="https://i.stack.imgur.com/CrEZi.png" alt="U"> = <b>u</b>nion</li> </ul> <p><strong>Gray</strong>: snippets</p> <ul> <li><img src="https://i.stack.imgur.com/RAYvb.png" alt="{}"> = snippets</li> </ul> <p><strong>Icons</strong>: <code>#pragma mark</code> or comments</p> <ul> <li><img src="https://i.stack.imgur.com/T54le.png" alt="Flag"> = <code>!!!: ...</code></li> <li><img src="https://i.stack.imgur.com/wygLD.png" alt="Patch"> = <code>FIXME: ...</code></li> <li><img src="https://i.stack.imgur.com/vdfGI.png" alt="?"> = <code>???: ...</code></li> <li><img src="https://i.stack.imgur.com/03Xt8.png" alt="Items"> = <code>TODO: ...</code></li> <li><img src="https://i.stack.imgur.com/TXxrb.png" alt="List"> = <code>MARK: ...</code></li> </ul> <p>You should be able to look up the meanings from the filenames from <code>/Developer/Library/PrivateFrameworks/DVTFoundation.framework/Resources/Xcode.SourceCodeSymbolKind.*.Icon.tiff</code>*. </p> <p>In later versions of Xcode, the path is moved to <code>/Applications/Xcode.app/Contents/SharedFrameworks/DVTFoundation.framework/Resources/Assets.car</code>, see <a href="https://stackoverflow.com/questions/22630418/analysing-assets-car-file-in-ios">Analysing Assets.car file in IOS</a> on how to extract the images from the *.car</p>
 

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