获取文件夹大小的简单方法(ObjC/Cocoa)? [英] Easy way to get size of folder (ObjC/Cocoa)?

问题描述

现在我正在使用此代码来获取文件夹的大小:

Right now I'm using this code to get the size of a folder:

NSArray *contents;
        NSEnumerator *enumerator;
        NSString *path;
        contents = [[NSFileManager defaultManager] subpathsAtPath:folderPath];
        enumerator = [contents objectEnumerator];
        while (path = [enumerator nextObject]) {
            NSDictionary *fattrib = [[NSFileManager defaultManager] fileAttributesAtPath:[folderPath stringByAppendingPathComponent:path] traverseLink:YES];
            fileSize +=[fattrib fileSize];
        }

        [contents release];
        [path release]; 

问题在于它非常不准确.它要么增加几兆字节，要么从实际大小中减去几兆字节.例如，我得到了一个 .app 包的文件大小，这个方法报告了 16.2MB，而实际是 15.8.

The problem is that its highly innacurate. It either adds a few megabytes or deducts a few megabytes from the actual size. For example I got the file size of an .app bundle and this method reported 16.2MB, whereas the actual thing is 15.8.

获取文件夹大小的最佳方法是什么?

What's the best way to get the size of a folder?

谢谢

推荐答案

我今天需要自己做这个，我发现Cocoa-dev 列表上的这篇文章 非常快而且匹配 Finder 对字节所说的内容.(不要忘记在 kFSCatInfoRsrcSizes 标志中使用 OR，这样您也可以获得资源分叉大小！)

I needed to do this today myself, and I've found that the code in this post on the Cocoa-dev list is super fast and matches what Finder says to the byte. (don't forget to OR in the kFSCatInfoRsrcSizes flag so you get resource fork sizes, too!)

如果你需要更多关于如何使用它的解释，只需发表评论，我会编辑这篇文章.=)

If you need more explanation on how to use it, just leave a comment and I'll edit this post. =)

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