objective-c file size formatter

Question

Is there build in methods for formatting file sizes in Objective C? Or may be you could suggest me some library/source code/etc.?

What I mean is you have some file size that should be displayed something like this depending on given size:

• 1234 kb
• 1,2 mb
• etc..

Thanks in advance

Answer 1

This one solves the problem quite elegantly:

[NSByteCountFormatter stringFromByteCount:countStyle:]

Example usage:

long long fileSize = 14378165;
NSString *displayFileSize = [NSByteCountFormatter stringFromByteCount:fileSize
                                                           countStyle:NSByteCountFormatterCountStyleFile];
NSLog(@"Display file size: %@", displayFileSize);

fileSize = 50291;
displayFileSize = [NSByteCountFormatter stringFromByteCount:fileSize
                                                 countStyle:NSByteCountFormatterCountStyleFile];
NSLog(@"Display file size: %@", displayFileSize);

Log output:

Display file size: 14.4 MB
Display file size: 50 KB

The output will be formatted properly according to the device's regional settings.

Available since iOS 6.0 and OS X 10.8.