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    <p>This looks like a bug that was introduced in OS X Mountain Lion 10.8 (<strong>Edit:</strong> there are also reports on OS X 10.7, see comments below) . I guess that <code>QTMovieView</code> will get deprecated in one of the next major OS X releases. The best solution is to move to AV Foundation (<code>AVPlayer</code> and the corresponding <code>AVPlayerLayer</code> class). Apple has some <a href="http://developer.apple.com/library/mac/#documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/02_Playback.html" rel="nofollow">documentation about playing back assets using this framework</a>.</p> <p>That said, if you can’t update to AV Foundation or you can’t turn off <em>Auto Layout</em>, you still can fix this issue by adding the missing methods dynamically during runtime to the <code>StdMovieUISliderCell</code> class. Make sure to add the Objective C runtime header file and to add the methods as early as possible (e.g. <code>+ (void)load</code> in your application delegate). For App Store static analyzer rejection foo reasons, it’s also safe to add some simple encoding to the class name like rot13.</p> <pre><code>// Make sure that we have the right headers. #import &lt;objc/runtime.h&gt; // The selectors should be recognized by class_addMethod(). @interface NSObject (SliderCellBugFix) - (NSSliderType)sliderType; - (NSInteger)numberOfTickMarks; @end // Add C implementations of missing methods that we’ll add // to the StdMovieUISliderCell class later. static NSSliderType SliderType(id self, SEL _cmd) { return NSLinearSlider; } static NSInteger NumberOfTickMarks(id self, SEL _cmd) { return 0; } // rot13, just to be extra safe. static NSString *ResolveName(NSString *aName) { const char *_string = [aName cStringUsingEncoding:NSASCIIStringEncoding]; NSUInteger stringLength = [aName length]; char newString[stringLength+1]; NSUInteger x; for(x = 0; x &lt; stringLength; x++) { unsigned int aCharacter = _string[x]; if( 0x40 &lt; aCharacter &amp;&amp; aCharacter &lt; 0x5B ) // A - Z newString[x] = (((aCharacter - 0x41) + 0x0D) % 0x1A) + 0x41; else if( 0x60 &lt; aCharacter &amp;&amp; aCharacter &lt; 0x7B ) // a-z newString[x] = (((aCharacter - 0x61) + 0x0D) % 0x1A) + 0x61; else // Not an alpha character newString[x] = aCharacter; } newString[x] = '\0'; return [NSString stringWithCString:newString encoding:NSASCIIStringEncoding]; } // Add both methods if they aren’t already there. This should makes this // code safe, even if Apple decides to implement the methods later on. + (void)load { Class MovieSliderCell = NSClassFromString(ResolveName(@"FgqZbivrHVFyvqrePryy")); if (!class_getInstanceMethod(MovieSliderCell, @selector(sliderType))) { const char *types = [[NSString stringWithFormat:@"%s%s%s", @encode(NSSliderType), @encode(id), @encode(SEL)] UTF8String]; class_addMethod(MovieSliderCell, @selector(sliderType), (IMP)SliderType, types); } if (!class_getInstanceMethod(MovieSliderCell, @selector(numberOfTickMarks))) { const char *types = [[NSString stringWithFormat: @"%s%s%s", @encode(NSInteger), @encode(id), @encode(SEL)] UTF8String]; class_addMethod(MovieSliderCell, @selector(numberOfTickMarks), (IMP)NumberOfTickMarks, types); } } </code></pre> <p>I made two assumptions while implementing both methods:</p> <ol> <li>A movie view can only have a linear slider, not a circular one.</li> <li>A movie view won’t have tick marks.</li> </ol> <p>The latter could be a problem if your movie has chapters, but I don’t know how they are handled, because I don’t need or use them.</p>
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    1. POhas anyone seen "[StdMovieUISliderCell sliderType]: unrecognized selector sent to instance"
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    1. USRafael Bugajewski
    1. USRafael Bugajewski
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    1. COThat’s even better than my rot13 solution. Thanks for sharing your experience.
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    2. COIt wasn't introduced in 10.8. I'm building and running on 10.7.5 and seeing it.
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