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PONSNotificationCenter selector won't work with its NSNotification
 

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    <p>I'm working on a Cocoa project with some C in it (I know, objc contains C...) and am trying to understand <code>NSNotificationCenter</code>s. Here's the situation:</p> <p>I have a struct declared as <code>typedef struct {/*code here*/} structName;</code></p> <p>In my <code>- (id)init</code> method, I have</p> <pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(selName:) name:@"notName" object:nil]; </code></pre> <p>I have a callback function:</p> <pre><code>int callback(/*args*/) { structName *f = ... NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init]; [[NSNotificationCenter defaultCenter] postNotificationName:@"notName" object:[[NSValue valueWithPointer:f] retain]]; [autoreleasepool release]; } </code></pre> <p>And then for my selector:</p> <pre><code>- (void)selName:(NSNotification *)note { NSLog(@"here"); NSLog(@"note is %@", note); } </code></pre> <p>Now, if I comment out that second <code>NSLog</code>, everything seems to work (i.e. "here" is printed). But if I leave it in, nothing about the <code>NSNotification</code> seems to work. But this seems to defeat the purpose of the object, userInfo, etc. of the <code>NSNotification</code>.</p> <p>What am I doing wrong and how can I fix it so I can have access to my <code>structName f</code>?</p> <p>@Nathan Okay, so now I have</p> <pre><code>NSDictionary *dict = [NSDictionary dictionaryWithObject:[NSValue valueWithPointer:f] forKey:@"fkey"];//f, not &amp;f. I had a typo in the OP which I fixed. [[NSNotificationCenter defaultCenter] postNotificationName:@"notName" object:nil userInfo:[dict retain]]; </code></pre> <p>...but the problem remains. Any chance this has to do with the typo I fixed?</p> <p>Edit:</p> <p>The problem continues even with changing the two lines above to</p> <pre><code>[[NSNotificationCenter defaultCenter] postNotificationName:@"notName" object:nil userInfo:[NSDictionary dictionaryWithObject:[NSData dataWithBytes:f length:sizeof(structName)] forKey:@"fkey"]]; </code></pre>
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