容易的方式来获取文件夹大小（ObjC / Cocoa）？ [英] Easy way to get size of folder (ObjC/Cocoa)?

问题描述

现在我使用这个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]; 

问题是它的高度天真。它添加几兆字节或从实际大小中扣除几兆字节。例如，我得到的文件大小的.app包，这种方法报告16.2MB，而实际的是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?

感谢

推荐答案

我需要自己做这个，我发现这个帖子在Cocoa-dev列表是超级快，匹配Finder说到字节。 （不要忘记在kFSCatInfoRsrcSizes标志中的OR，所以你得到资源fork的大小，太！）

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!)

如果你需要更多的解释如何使用它，评论，我将编辑此帖子。 =）

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

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