On May 23, 2008, at 5:19 PM, Sean McBride wrote:

On 5/22/08 4:37 PM, Lynn Barton said:

From what I have read quickly since Sean McBride sent his comment, UTIs are not yet implemented to the point where I could get the UTI of every file on
my computer.

Sure you can.  Use LSCopyItemAttributes() with kLSItemContentType.


I've written a category on NSFileManager that, among other things, will do this. Here's the relevant portion for you:

__________________________________________________
#import <Foundation/Foundation.h>

@interface NSFileManager (DSFileAdditions)
+ (NSString *)UTIForFile:(NSString *)path;
+ (NSString *)UTIForURL:(NSURL *)url;
@end

@implementation NSFileManager (DSFileAdditions)

+ (NSString *)UTIForFile:(NSString *)path
{
        return [self UTIForURL:[NSURL fileURLWithPath:path]];
}

+ (NSString *)UTIForURL:(NSURL *)url
{
        NSString *retval = nil;
        FSRefPtr fileRef = NULL;
        
        fileRef = calloc( 1, sizeof( FSRef ) );
        
if ( (fileRef != NULL) && (url != nil) && [url isFileURL] && (CFURLGetFSRef( (CFURLRef)url, fileRef ) == true) ) {
                CFStringRef theUTI = NULL;
if ( LSCopyItemAttribute( fileRef, kLSRolesAll, kLSItemContentType, (CFTypeRef *)&theUTI ) == noErr ) {
                        retval = [[(NSString *)theUTI copy] autorelease];
                        CFRelease( theUTI );
                }
        }
        
        if ( fileRef != NULL )
                free( fileRef );
        
        return retval;
}
__________________________________________________


I *think* this code should work fine under GC (for anyone using it), but you should probably test it first as I haven't.


--------------------------------------
Darkshadow
(aka Michael Nickerson)
http://www.nightproductions.net


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