asihttprequest上傳文件

1. NSString *fileName = [[NSBundle mainBundle] pathForResource:@"test"ofType:@"jpg"];  
2. NSString *url = @"http://....../upload.aspx";  
3. ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL: [NSURL URLWithString: url]];  
4. [request setPostValue: @"MyName" forKey: @"name"];  
5. [request setFile: fileName forKey: @"this_is_file"];  
6. [request buildRequestHeaders];  
7. NSLog(@"header: %@", request.requestHeaders);  
8. [request startSynchronous];  
9. NSLog(@"responseString = %@", request.responseString);