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<title>Outro – De Re @property</title>
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<meta name="twitter:description" content="Advantages of @property The main technical advantages are: Automated accessor generation reduces repetitive code Standardized memory management patterns in setters Direct control over getter/setter implementation when needed Properties handle the retain/release cycle in setters automatically Enhanced introspection Automated break of retain cycles during -finalize for readwrite properties Summary These are...">
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<h4>Nat!</h4>
<p>Senior Mull</p>
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<h2>De Re @property <div style="font-size:10px; display: inline-block;">0.0.1</div> <a href="feed.xml"><img class="inline-img" src='images/feed-icon-28x28.png'></a></h2>
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<h6>© 2025 by Nat!, Mulle kybernetiK. All rights reserved.</h6>
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<h4>Contents</h4>
<ul>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/intro.html" title="Intro">Intro</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/declaration.html" title="@property declaration">@property declaration</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/attributes.html" title="@property( attributes)">@property( attributes)</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/definition.html" title="@property definition">@property definition</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/access.html" title="@property access">@property access</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/runtime.html" title="@property signature">@property signature</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/class-inheritance.html" title="@property inheritance by class">@property inheritance by class</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/protocol-inheritance.html" title="@property inheritance by protocol">@property inheritance by protocol</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/protocolclass-inheritance.html" title="@property inheritance by protocolclass">@property inheritance by protocolclass</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/redeclaration.html" title="@property redeclaration">@property redeclaration</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/synthesize-directive.html" title="@synthesize">@synthesize</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/dynamic-directive.html" title="@dynamic">@dynamic</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/outro.html" title="Outro">Outro</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/assign.html" title="Reference: assign">Reference: assign</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/container.html" title="Reference: container">Reference: container</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/copy.html" title="Reference: copy">Reference: copy</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/dynamic.html" title="Reference: dynamic">Reference: dynamic</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/observable.html" title="Reference: observable">Reference: observable</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/nonatomic.html" title="Reference: nonatomic">Reference: nonatomic</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/readonly.html" title="Reference: readonly">Reference: readonly</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/retain.html" title="Reference: retain">Reference: retain</a>
</article>
<article>
<li class="no-bullet"><a class="internal-link" href="/de-re-property/serializable.html" title="Reference: serializable">Reference: serializable</a>
</article>
</ul>
<h5> Or read it like a <a href="book.html"><b>book</b></a>.</h6>
</div> <!-- contents -->
</div> <!-- sideline -->
</div>
<div id="post-second" class="eight columns">
<div class="title">
<div>
<h2>De Re @property <div style="font-size:10px; display: inline-block;">0.0.1</div> <a href="feed.xml"><img class="inline-img" src='images/feed-icon-28x28.png'></a></h2>
</div>
<h6>© 2025 by Nat!, Mulle kybernetiK. All rights reserved.</h6>
<p>
</div> <!-- title -->
<p>
<div id="main" role="main">
<article>
<h1>Outro</h1>
<div>
<h2 id="advantages-of-property">Advantages of @property</h2>
<p>The main technical advantages are:</p>
<ul>
<li>Automated accessor generation reduces repetitive code</li>
<li>Standardized memory management patterns in setters</li>
<li>Direct control over getter/setter implementation when needed</li>
<li>Properties handle the retain/release cycle in setters automatically</li>
<li>Enhanced introspection</li>
<li>Automated break of retain cycles during -finalize for readwrite properties</li>
</ul>
<h2 id="summary">Summary</h2>
<p>These are good rules to follow:</p>
<ul>
<li>do use <code class="language-plaintext highlighter-rouge">@property</code> whenever possible</li>
<li>do prefer <code class="language-plaintext highlighter-rouge">copy</code> over <code class="language-plaintext highlighter-rouge">retain</code>, whenever possible</li>
<li>do wrap <code class="language-plaintext highlighter-rouge">@protocol</code> properties into a <code class="language-plaintext highlighter-rouge">#define</code></li>
<li>do not redeclare <code class="language-plaintext highlighter-rouge">@property</code> types</li>
<li>do not use <code class="language-plaintext highlighter-rouge">@synthesize</code></li>
<li>do not use <code class="language-plaintext highlighter-rouge">@dynamic</code></li>
<li>avoid <code class="language-plaintext highlighter-rouge">readonly</code> properties, if you don’t need the introspection</li>
</ul>
<p>Rules are not laws.</p>
<h2 id="ai-tip">AI Tip</h2>
<p>You can ask any AI like <a href="https://perplexity.ai">perplexity.ai</a>, just tell it that you are
using “mulle-objc” instead of Apple “Objective-C”.
Most of them are quite good at explaining the concepts.</p>
<h2 id="odd-tip">Odd Tip</h2>
<p>For a few special cases a <code class="language-plaintext highlighter-rouge">@public</code> instance variable can be a simple alternative to a property.</p>
<h2 id="links">Links</h2>
<p>If you have problems with this little pamphlet or want a second opinion, you could try the
following sources:</p>
<ol>
<li><a href="https://fullonrager.github.io/rys-objective-c-tutorial-archive/properties.html">Rys Objective-C Tutorial - Properties</a></li>
<li><a href="https://www.geeksforgeeks.org/properties-in-objective-c/">GeeksForGeeks - Properties in Objective-C</a></li>
<li><a href="https://stackoverflow.com/questions/10909039/in-objective-c-when-should-i-use-property-and-when-should-i-use-instance-variab">Stack Overflow - Properties vs Instance Variables</a></li>
<li><a href="https://www.youtube.com/watch?v=r6dOUEeGr_w">Video Tutorial - Properties</a></li>
<li><a href="https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjectiveC/Chapters/ocProperties.html">Apple - Properties</a></li>
<li><a href="https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/EncapsulatingData/EncapsulatingData.html">Apple - Encapsulating Data</a></li>
</ol>
<p>Be wary of the following concepts though: <code class="language-plaintext highlighter-rouge">weak</code>, <code class="language-plaintext highlighter-rouge">strong</code>, <code class="language-plaintext highlighter-rouge">atomic</code>, <code class="language-plaintext highlighter-rouge">unsafe_unretained</code>,
<code class="language-plaintext highlighter-rouge">@synthesize</code>, “ARC”, “Property Observers”, “Dot Notation”, “Xcode”
which are all more or less not applicable to mulle-objc.</p>
</div>
</article>
</div>
<p>
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