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POHow to check whether directories with a given extension are shown by the Finder as a package?
 

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  1. POHow to check whether directories with a given extension are shown by the Finder as a package?
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    <p>For a given extension, how do you check whether directories with that extension will be shown by the Finder as a package?</p> <p>I figured the method below is an effective implementation for this, but creating a temporary directory feels like a hack. I'm guessing I should be able to implement this properly through the <a href="https://developer.apple.com/library/mac/#documentation/Carbon/Reference/LaunchServicesReference/Reference/reference.html" rel="nofollow">Launch Services API</a>, but I can't quite figure out how to do it (I might be overlooking the obvious though).</p> <pre><code>// Extension method on NSWorkspace @implementation NSWorkspace (MyExtraMethods) - (BOOL) isPackageExtension: (NSString*) extension { NSString * pathToTemp = [NSTemporaryDirectory() stringByAppendingPathComponent:[@"Untitled" stringByAppendingPathExtension: extension]]; [[NSFileManager defaultManager] createDirectoryAtPath:pathToTemp withIntermediateDirectories:NO attributes:nil error:NULL]; BOOL result = [[NSWorkspace sharedWorkspace] isFilePackageAtPath: pathToTemp]; [[NSFileManager defaultManager] removeItemAtPath:pathToTemp error:NULL]; return result; } @end // Basic test for the above - (void) testIsPackageExtension { STAssertFalse([[NSWorkspace sharedWorkspace] isPackageExtension: @"txt"], @""); STAssertFalse([[NSWorkspace sharedWorkspace] isPackageExtension: @"rtf"], @""); STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"rtfd"], @""); STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"app"], @""); STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"kext"], @""); STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"clr"], @""); /* The following tests depend on having applications installed that are not included in Mac OS X: .esproj Espresso, tested with version 2.0.5 ( http://macrabbit.com/espresso/ ) .dtps Instruments, included in Xcode, tested with version 4.5 (4523) */ STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"esproj"], @""); STAssertTrue([[NSWorkspace sharedWorkspace] isPackageExtension: @"dtps"], @""); } </code></pre> <p><strong>Edit</strong>: The test above has been edited to include additional example extensions (original post only used "rtf" and "rtfd").</p>
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