Question

I’m new in objective-c.
I have a path to file contained in an NSString and I want get file size. I found this example and change deprecated code with attributesOfItemAtPath:error: but path is always invalid.

NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *path = @"~/Library/Safari/History.plist";
NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath: path error: NULL];


if (fileAttributes != nil) {
    NSNumber *fileSize;

    if (fileSize == [fileAttributes objectForKey:NSFileSize]) {
        NSLog(@"File size: %qi\n", [fileSize unsignedLongLongValue]);
    }

}
else {
    NSLog(@"Path (%@) is invalid.", pPath);
}
[NSFileManager release];

Answer 1

This should work:

uint64_t fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:_filePath error:nil] fileSize];

It’s very similar to the one used by you, but in yours there’s a mistake: you put NULL instead of nil in the error: handling.

Make sure also to expand tilde in your path, as explained in the documentation: use stringByExpandingTildeInPath, so your NSString *path should be something like this:

NSString *path = [[NSString stringWithString:@"~/Library/Safari/History.plist"] stringByExpandingTildeInPath];

Here you can find some explanations about the difference between nil and NULL.