IOS POST 数据，包括文件 到服务器

// Upload a file on disk

NSURL *url = [NSURL URLWithString:@"/kids_file/js"];

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];

//NSFileManager *fileManager = [NSFileManager defaultManager]; 

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [[paths objectAtIndex:0] stringByAppendingFormat:@"/painting/"];

NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@""];

[request setPostValue:@"xiao fox 高峰君" forKey:@"name"];

[request setPostValue:@"girl" forKey:@"sex"];

[request setFile:writableDBPath withFileName:@"" andContentType:@"image/jpeg" forKey:@"photo"];

[request setDelegate:self];

[request startAsynchronous];