这就是 IPOST 网络服务文件( 可以是任何文件、 图像、 视频、 音频、 视频、 任何音频) 的方式

NSString *fileName = @"myAudio";
    NSData *audioFile = [NSData dataWithContentsOfFile:@"myAudio.ext"]; //some audio
    NSString *urlString = @"http://www.something.com/someservice";
    urlString = [urlString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
    NSURL *url = [NSURL URLWithString:urlString];
    NSString *strPostLength = [NSString stringWithFormat:@"%d", [audioFile length]];  
    NSMutableURLRequest *uRequest = [[NSMutableURLRequest alloc] init];  
    [uRequest setURL:url];  
    [uRequest setHTTPMethod:@"POST"];  
    if (audioFile)
    {
        NSMutableData *body = [NSMutableData data];

        NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
        NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
        [uRequest addValue:contentType forHTTPHeaderField: @"Content-Type"];

        /*
         now lets create the body of the post
         */

        [body appendData:[[NSString stringWithFormat:@"
--%@
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [uRequest setValue:strPostLength forHTTPHeaderField:@"Content-Length"];  
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="userfile"; filename="%@.ext"
",fileName] dataUsingEncoding:NSUTF8StringEncoding]];

/ 用户文件 - & gt; 服务器代码中给出的变量名称...

        [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream

"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[NSData dataWithData:audioFile]];
        [body appendData:[[NSString stringWithFormat:@"
--%@--
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

        // setting the body of the post to the reqeust
        [uRequest setHTTPBody:body];
    }

    NSURLConnection *uConn=[[NSURLConnection alloc] initWithRequest:uRequest delegate:self];  
    if (uConn)   
    {  
        NSLog(@"Failed to connect to url"); 
    } 
    uRequest = nil;

我希望这能帮助你 解决你的问题...