How to get the file size given a path?

Question

I have a path to file contained in an NSString. Is there a method to get its file size?

score 138 · Answer 1 · edited Feb 25 '16 at 08:06

138

This one liner can help people:

unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:someFilePath error:nil] fileSize];

This returns the file size in Bytes.

edited Feb 25 '16 at 08:06

Flexo

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answered Mar 06 '11 at 17:19

Oded Ben Dov

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I like this one. But what measurement is this in? bytes, Kb, etc? Thanks too. – James Jan 03 '12 at 13:55
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bytes - the measurement is bytes – Oded Ben Dov Jan 11 '12 at 09:18
What happens if your file is larger than `INT_MAX` bytes in size? You might want to cast the result to `size_t` or `unsigned long long int`, which allows accurate reporting of the size of large files (> 2 GB). – Alex Reynolds Jan 12 '12 at 12:13
3

The actual return value of the method is `unsigned long long`, so `int` isn't fit to be here. – coverback Jun 27 '12 at 08:06

Frank Shearar · Answer 2 · 2013-02-15T12:02:27.457

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Bear in mind that fileAttributesAtPath:traverseLink: is deprecated as of Mac OS X v10.5. Use attributesOfItemAtPath:error: instead, described at the same URL thesamet mentions.

With the caveat that I'm an Objective-C newbie, and I'm ignoring errors that might occur in calling attributesOfItemAtPath:error:, you can do the following:

NSString *yourPath = @"Whatever.txt";
NSFileManager *man = [NSFileManager defaultManager];
NSDictionary *attrs = [man attributesOfItemAtPath: yourPath error: NULL];
UInt32 result = [attrs fileSize];

edited Feb 15 '13 at 12:02

answered Nov 10 '09 at 12:54

Frank Shearar

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This code leaks the alloced FileManager. I recommend you simply use the NSFileManager.defaultManager Singleton to avoid this. – Johannes Rudolph Oct 18 '12 at 10:07

score 16 · Answer 3 · edited May 03 '16 at 15:00

16

In case some one needs a Swift version:

let attr: NSDictionary = try! NSFileManager.defaultManager().attributesOfItemAtPath(path)
print(attr.fileSize())

edited May 03 '16 at 15:00

Babac

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answered Feb 28 '15 at 08:49

Tyler Liu

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score 12 · Answer 4 · edited May 23 '17 at 11:33

12

CPU raises with attributesOfItemAtPath:error:
You should use stat.

#import <sys/stat.h>

struct stat stat1;
if( stat([inFilePath fileSystemRepresentation], &stat1) ) {
      // something is wrong
}
long long size = stat1.st_size;
printf("Size: %lld\n", stat1.st_size);

edited May 23 '17 at 11:33

Community

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answered Jun 27 '12 at 12:31

Parag Bafna

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Shouldn't you be using fileSystemRepresentation rather than UTF8String here? – David Knight Jan 23 '13 at 11:41
You are right. HFS+ defines a standard Unicode decomposition ("canonical decomposition") for filenames. -UTF8String is not guaranteed to return the proper composition; -fileSystemRepresentation is.[1](http://cocoadev.com/wiki/StringWithCString) – Parag Bafna Jan 28 '13 at 07:11
@ParagBafna I know this is an old thread but do you know how I could use the `stat` structure in swift? – Jonathan H. Jun 26 '15 at 22:05

score 8 · Answer 5 · answered Sep 28 '17 at 13:26

If you want only file size with bytes just use,

unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:nil] fileSize];

NSByteCountFormatter string conversion of filesize (from Bytes) with precise KB, MB, GB ... Its returns like 120 MB or 120 KB

NSError *error = nil;
NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:&error];
if (attrs) {
    NSString *string = [NSByteCountFormatter stringFromByteCount:fileSize countStyle:NSByteCountFormatterCountStyleBinary];
    NSLog(@"%@", string);
}

score 6 · Answer 6 · answered May 20 '13 at 14:00

6

Following the answer from Oded Ben Dov, I would rather use an object here:

NSNumber * mySize = [NSNumber numberWithUnsignedLongLong:[[[NSFileManager defaultManager] attributesOfItemAtPath:someFilePath error:nil] fileSize]];

answered May 20 '13 at 14:00

Apollo

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score 2 · Answer 7 · answered Mar 28 '16 at 16:47

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Swift 2.2:

do {
    let attr: NSDictionary = try NSFileManager.defaultManager().attributesOfItemAtPath(path)
    print(attr.fileSize())
} catch {
        print(error)
}

answered Mar 28 '16 at 16:47

Bill Chan

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Akshay Phulare · Answer 8 · 2016-08-02T06:04:16.380

1

It will give File size in Byte...

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

edited Aug 02 '16 at 06:04

answered Aug 02 '16 at 05:59

Akshay Phulare

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score 0 · Answer 9 · answered Mar 03 '18 at 13:52

0

Swift4:

        let attributes = try! FileManager.default.attributesOfItem(atPath: path)
        let fileSize = attributes[.size] as! NSNumber

answered Mar 03 '18 at 13:52

Denis Kreshikhin

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score 0 · Answer 10 · answered Aug 27 '19 at 09:37

In Swift 3.x and above you can use:

do {
    //return [FileAttributeKey : Any]
    let attr = try FileManager.default.attributesOfItem(atPath: filePath)
    fileSize = attr[FileAttributeKey.size] as! UInt64

    //or you can convert to NSDictionary, then get file size old way as well.
    let attrDict: NSDictionary = try FileManager.default.attributesOfItem(atPath: filePath) as NSDictionary
    fileSize = dict.fileSize()
} catch {
    print("Error: \(error)")
}

You have an error in your code. You define attrDict, but you call dict.fileSize. — SouthernYankee65, Mar 18 '22 at 00:24

How to get the file size given a path?

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