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<h1>SDLAlert Class Reference</h1>
<h3>Section Contents</h3>
<ul>
<li><a href="#section--initWithAlertText:softButtons:playTone:ttsChunks:alertIcon:cancelID:">-initWithAlertText:softButtons:playTone:ttsChunks:alertIcon:cancelID:</a></li>
<li><a href="#section--initWithTTSChunks:playTone:">-initWithTTSChunks:playTone:</a></li>
<li><a href="#section--initWithAlertText1:alertText2:alertText3:softButtons:playTone:ttsChunks:duration:progressIndicator:alertIcon:cancelID:">-initWithAlertText1:alertText2:alertText3:softButtons:playTone:ttsChunks:duration:progressIndicator:alertIcon:cancelID:</a></li>
<li><a href="#section-alertText1">alertText1</a></li>
<li><a href="#section-alertText2">alertText2</a></li>
<li><a href="#section-alertText3">alertText3</a></li>
<li><a href="#section-ttsChunks">ttsChunks</a></li>
<li><a href="#section-duration">duration</a></li>
<li><a href="#section-playTone">playTone</a></li>
<li><a href="#section-progressIndicator">progressIndicator</a></li>
<li><a href="#section-softButtons">softButtons</a></li>
<li><a href="#section-cancelID">cancelID</a></li>
<li><a href="#section-alertIcon">alertIcon</a></li>
</ul>
<h3>Overview</h3>
<p>Shows an alert which typically consists of text-to-speech message and text on the display. Either <code>alertText1</code>, <code>alertText2</code> or <code>TTSChunks</code> needs to be set or the request will be rejected.</p>
<p>If connecting to SDL Core v.6.0+, the alert can be canceled programmatically using the <code>cancelID</code>. Canceling will not dismiss the alert’s speech - only the modal view will be dismissed. On older versions of SDL Core, the alert will persist until the user has interacted with the alert or the specified timeout has elapsed.</p>
<p>@since SDL 1.0</p>
<section class="section task-group-section">
<h3 id="section--initWithAlertText:softButtons:playTone:ttsChunks:alertIcon:cancelID:">
-initWithAlertText:softButtons:playTone:ttsChunks:alertIcon:cancelID:
</h3>
<p>Convenience init for creating a modal view with text, buttons, and optional sound cues.</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span>
<span class="nf">initWithAlertText</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">alertText</span>
<span class="nf">softButtons</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span> <span class="o">*></span> <span class="o">*</span><span class="p">)</span><span class="nv">softButtons</span>
<span class="nf">playTone</span><span class="p">:(</span><span class="n">BOOL</span><span class="p">)</span><span class="nv">playTone</span>
<span class="nf">ttsChunks</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span> <span class="o">*></span> <span class="o">*</span><span class="p">)</span><span class="nv">ttsChunks</span>
<span class="nf">alertIcon</span><span class="p">:(</span><span class="n">nullable</span> <span class="n"><a href="../Classes/SDLImage.html">SDLImage</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">icon</span>
<span class="nf">cancelID</span><span class="p">:(</span><span class="n">UInt32</span><span class="p">)</span><span class="nv">cancelID</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">alertText</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">softButtons</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span><span class="p">]?,</span> <span class="nv">playTone</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">,</span> <span class="nv">ttsChunks</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span><span class="p">]?,</span> <span class="n"><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertIcon">alertIcon</a></span> <span class="nv">icon</span><span class="p">:</span> <span class="kt"><a href="../Classes/SDLImage.html">SDLImage</a></span><span class="p">?,</span> <span class="nv">cancelID</span><span class="p">:</span> <span class="kt">UInt32</span><span class="p">)</span></code></pre>
<h4>Parameters</h4>
<dl>
<dt>alertText</dt>
<dd><p>The string to be displayed in the first field of the display</p></dd>
<dt>softButtons</dt>
<dd><p>Soft buttons to be displayed</p></dd>
<dt>playTone</dt>
<dd><p>Whether the alert tone should be played before the TTS (if any) is spoken</p></dd>
<dt>ttsChunks</dt>
<dd><p>Speech or a sound file to be played when the alert shows</p></dd>
<dt>cancelID</dt>
<dd><p>An ID for this specific alert to allow cancellation through the <code>CancelInteraction</code> RPC</p></dd>
<dt>icon</dt>
<dd><p>Image to be displayed in the alert</p></dd>
</dl>
<div>
<h4>Return Value</h4>
<p>An SDLAlert object</p>
</div>
<h3 id="section--initWithTTSChunks:playTone:">
-initWithTTSChunks:playTone:
</h3>
<p>Convenience init for creating a sound-only alert.</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span><span class="nf">initWithTTSChunks</span><span class="p">:</span>
<span class="p">(</span><span class="n">nullable</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span> <span class="o">*></span> <span class="o">*</span><span class="p">)</span><span class="nv">ttsChunks</span>
<span class="nf">playTone</span><span class="p">:(</span><span class="n">BOOL</span><span class="p">)</span><span class="nv">playTone</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">ttsChunks</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span><span class="p">]?,</span> <span class="nv">playTone</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">)</span></code></pre>
<h4>Parameters</h4>
<dl>
<dt>ttsChunks</dt>
<dd><p>Speech or a sound file to be played when the alert shows</p></dd>
<dt>playTone</dt>
<dd><p>Whether the alert tone should be played before the TTS is spoken</p></dd>
</dl>
<div>
<h4>Return Value</h4>
<p>An SDLAlert object</p>
</div>
<h3 id="section--initWithAlertText1:alertText2:alertText3:softButtons:playTone:ttsChunks:duration:progressIndicator:alertIcon:cancelID:">
-initWithAlertText1:alertText2:alertText3:softButtons:playTone:ttsChunks:duration:progressIndicator:alertIcon:cancelID:
</h3>
<p>Convenience init for setting all alert parameters.</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span>
<span class="nf">initWithAlertText1</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">alertText1</span>
<span class="nf">alertText2</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">alertText2</span>
<span class="nf">alertText3</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">alertText3</span>
<span class="nf">softButtons</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span> <span class="o">*></span> <span class="o">*</span><span class="p">)</span><span class="nv">softButtons</span>
<span class="nf">playTone</span><span class="p">:(</span><span class="n">BOOL</span><span class="p">)</span><span class="nv">playTone</span>
<span class="nf">ttsChunks</span><span class="p">:(</span><span class="n">nullable</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span> <span class="o">*></span> <span class="o">*</span><span class="p">)</span><span class="nv">ttsChunks</span>
<span class="nf">duration</span><span class="p">:(</span><span class="n">UInt16</span><span class="p">)</span><span class="nv">duration</span>
<span class="nf">progressIndicator</span><span class="p">:(</span><span class="n">BOOL</span><span class="p">)</span><span class="nv">progressIndicator</span>
<span class="nf">alertIcon</span><span class="p">:(</span><span class="n">nullable</span> <span class="n"><a href="../Classes/SDLImage.html">SDLImage</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">icon</span>
<span class="nf">cancelID</span><span class="p">:(</span><span class="n">UInt32</span><span class="p">)</span><span class="nv">cancelID</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">alertText1</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">alertText2</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">alertText3</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">softButtons</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span><span class="p">]?,</span> <span class="nv">playTone</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">,</span> <span class="nv">ttsChunks</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span><span class="p">]?,</span> <span class="nv">duration</span><span class="p">:</span> <span class="kt">UInt16</span><span class="p">,</span> <span class="nv">progressIndicator</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">,</span> <span class="n"><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertIcon">alertIcon</a></span> <span class="nv">icon</span><span class="p">:</span> <span class="kt"><a href="../Classes/SDLImage.html">SDLImage</a></span><span class="p">?,</span> <span class="nv">cancelID</span><span class="p">:</span> <span class="kt">UInt32</span><span class="p">)</span></code></pre>
<h4>Parameters</h4>
<dl>
<dt>alertText1</dt>
<dd><p>The first line of the alert</p></dd>
<dt>alertText2</dt>
<dd><p>The second line of the alert</p></dd>
<dt>alertText3</dt>
<dd><p>The third line of the alert</p></dd>
<dt>softButtons</dt>
<dd><p>Buttons for the alert</p></dd>
<dt>playTone</dt>
<dd><p>Whether the alert tone should be played before the TTS (if any) is spoken</p></dd>
<dt>ttsChunks</dt>
<dd><p>An array of text chunks to be spoken or a prerecorded sound file</p></dd>
<dt>duration</dt>
<dd><p>The duration of the displayed portion of the alert, in milliseconds</p></dd>
<dt>progressIndicator</dt>
<dd><p>Whether an animation indicating that loading of a feature is progressing should be shown</p></dd>
<dt>cancelID</dt>
<dd><p>An ID for this specific alert to allow cancellation through the <code>CancelInteraction</code> RPC</p></dd>
<dt>icon</dt>
<dd><p>Image to be displayed in the alert</p></dd>
</dl>
<div>
<h4>Return Value</h4>
<p>An SDLAlert object</p>
</div>
<h3 id="section-alertText1">
alertText1
</h3>
<p>The first line of the alert text field.</p>
<p>@discussion At least either <code>alertText1</code>, <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertText2">alertText2</a></code> or <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)ttsChunks">ttsChunks</a></code> need to be provided.
@discussion If supported, the <code>displayCapabilities</code> will have a <code>TextField</code> with a <code>name</code> of <code>alertText1</code>.</p>
<p>String, Optional, Max length 500 chars
@since SDL 1.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSString</span> <span class="o">*</span><span class="n">alertText1</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">alertText1</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-alertText2">
alertText2
</h3>
<p>The second line of the alert text field.</p>
<p>@discussion At least either <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertText1">alertText1</a></code>, <code>alertText2</code> or <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)ttsChunks">ttsChunks</a></code> need to be provided.
@discussion If supported, the <code>displayCapabilities</code> will have a <code>TextField</code> with a <code>name</code> of <code>alertText2</code></p>
<p>String, Optional, Max length 500 chars
@since SDL 1.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSString</span> <span class="o">*</span><span class="n">alertText2</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">alertText2</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-alertText3">
alertText3
</h3>
<p>The optional third line of the alert text field.</p>
<p>@discussion If supported, the <code>displayCapabilities</code> will have a <code>TextField</code> with a <code>name</code> of <code>alertText3</code></p>
<p>String, Optional, Max length 500 chars
@since SDL 2.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSString</span> <span class="o">*</span><span class="n">alertText3</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">alertText3</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-ttsChunks">
ttsChunks
</h3>
<p>An array of text chunks to be spoken or a prerecorded sound file.</p>
<p>@discussion At least either <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertText1">alertText1</a></code>, <code><a href="../Classes/SDLAlert.html#/c:objc(cs)SDLAlert(py)alertText2">alertText2</a></code> or <code>ttsChunks</code> need to be provided.</p>
<p>Array of SDLTTSChunk, Optional, Array length 1 - 100</p>
<p>@since SDL 1.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span> <span class="o">*></span> <span class="o">*</span><span class="n">ttsChunks</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">ttsChunks</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLTTSChunk.html">SDLTTSChunk</a></span><span class="p">]?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-duration">
duration
</h3>
<p>The duration of the displayed portion of the alert, in milliseconds. Typical timeouts are 3 - 5 seconds. If omitted, the timeout is set to a default of 5 seconds.</p>
<p>Integer, Optional, Min value: 3000, Max value: 10000</p>
<p>@since SDL 1.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSNumber</span><span class="o"><</span><span class="n"><a href="../Protocols.html#/c:objc(pl)SDLInt">SDLInt</a></span><span class="o">></span> <span class="o">*</span><span class="n">duration</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">duration</span><span class="p">:</span> <span class="p">(</span><span class="kt">NSNumber</span> <span class="o">&</span> <span class="kt"><a href="../Protocols.html#/c:objc(pl)SDLInt">SDLInt</a></span><span class="p">)?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-playTone">
playTone
</h3>
<p>Whether the alert tone should be played before the TTS (if any) is spoken. If omitted or set to false, no tone is played.</p>
<p>Boolean, Optional</p>
<p>@since SDL 1.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSNumber</span><span class="o"><</span><span class="n"><a href="../Protocols.html#/c:objc(pl)SDLBool">SDLBool</a></span><span class="o">></span> <span class="o">*</span><span class="n">playTone</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">playTone</span><span class="p">:</span> <span class="p">(</span><span class="kt">NSNumber</span> <span class="o">&</span> <span class="kt"><a href="../Protocols.html#/c:objc(pl)SDLBool">SDLBool</a></span><span class="p">)?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-progressIndicator">
progressIndicator
</h3>
<p>If supported on the given platform, the alert GUI will include some sort of animation indicating that loading of a feature is progressing (e.g. a spinning wheel or hourglass, etc.).</p>
<p>Boolean, Optional</p>
<p>@since SDL 2.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSNumber</span><span class="o"><</span><span class="n"><a href="../Protocols.html#/c:objc(pl)SDLBool">SDLBool</a></span><span class="o">></span> <span class="o">*</span><span class="n">progressIndicator</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">progressIndicator</span><span class="p">:</span> <span class="p">(</span><span class="kt">NSNumber</span> <span class="o">&</span> <span class="kt"><a href="../Protocols.html#/c:objc(pl)SDLBool">SDLBool</a></span><span class="p">)?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-softButtons">
softButtons
</h3>
<p>Buttons for the displayed alert. If omitted on supported displays, the displayed alert shall not have any buttons.</p>
<p>Array of SDLSoftButton, Optional, Array size 0 - 4</p>
<p>@since SDL 2.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSArray</span><span class="o"><</span><span class="n"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span> <span class="o">*></span> <span class="o">*</span><span class="n">softButtons</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">softButtons</span><span class="p">:</span> <span class="p">[</span><span class="kt"><a href="../Classes/SDLSoftButton.html">SDLSoftButton</a></span><span class="p">]?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-cancelID">
cancelID
</h3>
<p>An ID for this specific alert to allow cancellation through the <code>CancelInteraction</code> RPC.</p>
<p>Integer, Optional</p>
<div class="aside aside-see">
<p class="aside-title">See</p>
SDLCancelInteraction
@since SDL 6.0
</div>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n">NSNumber</span><span class="o"><</span><span class="n"><a href="../Protocols.html#/c:objc(pl)SDLInt">SDLInt</a></span><span class="o">></span> <span class="o">*</span><span class="n">cancelID</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">cancelID</span><span class="p">:</span> <span class="p">(</span><span class="kt">NSNumber</span> <span class="o">&</span> <span class="kt"><a href="../Protocols.html#/c:objc(pl)SDLInt">SDLInt</a></span><span class="p">)?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
<h3 id="section-alertIcon">
alertIcon
</h3>
<p>Image to be displayed in the alert. If omitted on supported displays, no (or the default if applicable) icon should be displayed.</p>
<p>SDLImage, Optional
@since SDL 6.0</p>
<h4>Objective-C</h4>
<pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">nonatomic</span><span class="p">,</span> <span class="n">strong</span><span class="p">,</span> <span class="n">nullable</span><span class="p">)</span> <span class="n"><a href="../Classes/SDLImage.html">SDLImage</a></span> <span class="o">*</span><span class="n">alertIcon</span><span class="p">;</span></code></pre>
<h4>Swift</h4>
<pre class="highlight swift"><code><span class="k">var</span> <span class="nv">alertIcon</span><span class="p">:</span> <span class="kt"><a href="../Classes/SDLImage.html">SDLImage</a></span><span class="p">?</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>
</section>
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