iOS判断文件或者文件夹的大小

判断文件大小(返回字节长度)

- (long long)fileSizeAtPath:(NSString *)filePath {
    NSFileManager *manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:filePath]) {
        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
    }
    return 0;
}

判断文件夹大小(返回字节长度)

- (float)folderSizeAtPath:(NSString *)folderPath {
    NSFileManager *manager = [NSFileManager defaultManager];
    if (![manager fileExistsAtPath:folderPath]) return 0;
    NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
    NSString* fileName;
    long long folderSize = 0;
    while ((fileName = [childFilesEnumerator nextObject]) != nil){
        NSString *fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
        folderSize += [self fileSizeAtPath:fileAbsolutePath];
    }
    return folderSize;
}