获取文件夹大小

- (unsignedlonglongint)folderSize:(NSString *)folderPath {
    NSArray *filesArray = [[NSFileManagerdefaultManager] subpathsOfDirectoryAtPath:folderPath error:nil];
    NSEnumerator *filesEnumerator = [filesArray objectEnumerator];
    NSString *fileName;
    unsignedlonglongint fileSize = 0;
    NSError* error;
    while (fileName = [filesEnumerator nextObject]) {
        NSDictionary* fileDictionary = [[NSFileManagerdefaultManager] attributesOfItemAtPath:[folderPath stringByAppendingPathComponent:fileName] error:&error];
        fileSize += [fileDictionary fileSize];
    } 
    
    return fileSize;
}

-(NSString *)getMPSize
{
    NSString*sizeTypeW = @"bytes";
    int app = [self folderSize:@"/PathToTheFolderYouWantTheSizeOf/"];
    NSFileManager *manager = [NSFileManagerdefaultManager];
    if([manager fileExistsAtPath:@"/AnotherFolder/"] == YES){
        int working = [self folderSize:@"/AnotherFolder/"];
        if(working<1){
            return @"Size: Zero KB";
        }else{
            if (working > 1024)
            {
                //Kilobytes
                working = working / 1024;
                
                sizeTypeW = @" KB";
            }
            
            if (working > 1024)
            {
                //Megabytes
                working = working / 1024;
                
                sizeTypeW = @" MB";
            }
            
            if (working > 1024)
            {
                //Gigabytes
                working = working / 1024;
                
                sizeTypeW = @" GB";
            }
            
            return [NSStringstringWithFormat:@"App: %i MB, Working: %i %@ ",app/1024/1024, working,sizeTypeW];
        }
        
    }else{
        return [NSStringstringWithFormat:@"App: %i MB, Working: Zero KB",app/1024/1024];
    }
    [manager release];
}