文件夹大小错误 [英] folder size wrong

问题描述

此代码正确，但是文件夹大小错误.如果我更改目录，大小总是错误的.例如，％@/Caches/com.apple.Safari/网页预览"的大小为23 MB，但我有16.5 KB.

This code is correct but the folder size is wrong. If I change the directory the size is always wrong. For example the size of "%@/Caches/com.apple.Safari/Webpage Previews" is 23 MB, but I have 16.5 KB.

NSString *path = [NSString stringWithFormat:@"%@/Caches/com.apple.Safari/Webpage Previews", [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0]];
    NSNumber *fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:path error:nil] objectForKey:NSFileSize];
    resultsize += [fileSize unsignedLongLongValue];

我也用这个，但是大小总是错误的:

also I used this but the size is always wrong:

NSFileManager *fm = [[NSFileManager alloc] init];    
    NSURL *LibraryURL = [[fm URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask] lastObject];
    NSURL *previewsURL = [LibraryURL URLByAppendingPathComponent:@"Caches/com.apple.Safari/Webpage Previews"];

    resultSize += [[[fm attributesOfItemAtPath:[previewsURL path] error:nil] objectForKey:NSFileSize] unsignedIntegerValue];

你能帮我吗? 谢谢.

推荐答案

如果要获取文件夹中所有文件的大小，则需要遍历该文件夹的内容并获取该文件的大小.实际文件:

If you want to get the size of all the files in a folder, you'll need to iterate through the contents of the folder and get the sizes of the actual files:

unsigned long long totalSize = 0;
NSFileManager *fm = [[NSFileManager alloc] init];
NSURL *libraryURL = [[fm URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask] lastObject];
NSURL *previewsURL = [LibraryURL URLByAppendingPathComponent:@"Caches/com.apple.Safari/Webpage Previews"];

NSDirectoryEnumerator *enumerator = [fm enumeratorAtURL:previewsURL includingPropertiesForKeys:[NSArray arrayWithObject:NSURLFileSizeKey] options:0 errorHandler:nil /* or an actual error handler */];

for (NSURL *url in enumerator) {
    NSNumber *sizeNumber;
    if ([url getResourceValue:&sizeNumber forKey:NSURLFileSizeKey error:nil /* or an error */])
        totalSize += [sizeNumber unsignedLongLongValue]; 
}

(我还没有测试过.)

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