nsdata - writeToFile: 正しいパスを返しますが、ファイルはありませんか?

Question

NSImage 用に持っている NSData から PNG を作成するためのこのコードがありますが、ダウンロード フォルダーにファイルが作成されませんか?

- (IBAction)saveToDownloadsFolder:(id)sender {

    NSInteger selected = [tvContent selectedRow];
    ImageCell *selectedRow = [tvContent viewAtColumn:0 row:selected makeIfNecessary:YES];

    NSURL *documentsURL = [[NSFileManager defaultManager] URLForDirectory:NSDownloadsDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];

    CGImageRef CGImage = [selectedRow.item.image CGImageForProposedRect:nil context:nil hints:nil];
    NSBitmapImageRep *rep = [[[NSBitmapImageRep alloc] initWithCGImage:CGImage] autorelease];
    NSDictionary* imageProps = [NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:1] forKey:NSImageCompressionFactor];
    NSData *data = [rep representationUsingType: NSPNGFileType properties:imageProps];
    [data writeToFile:[NSString stringWithFormat:@"%@", [documentsURL URLByAppendingPathComponent:@"Copyfeed-Image.png"]] atomically:YES];


    NSLog(@"URL %@", [NSString stringWithFormat:@"%@", [documentsURL URLByAppendingPathComponent:@"Copyfeed-Image.png"]]);

}