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这里是我的代码upload an audio file。 I tried lot of questions and answers in stackoverflow。但我仍然没有得到任何改善。我必须上传带有php link的音频文件。如果我这样做，我总是得到像“already exists”这样的回应。我试图改变文件名并上传它。仍然得到同样的回应。其实我必须收到来自服务器的回应，作为我上传文件的链接。我没有任何关于php的知识。任何人都可以帮助我。任何帮助将不胜感激，以清除我的问题。上传音频文件并在ios中收到意外的响应
NSData *fileData=[NSData dataWithContentsOfURL:soundFileURL];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://somesite.com/upload.php"]];
[request setHTTPMethod:@"POST"];
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSMutableData *body = [[NSMutableData alloc]init];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"fvgv4r346r4r4h3ur543ty5u54y5u4574545g4g5.samr\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//[soundFileURL lastPathComponent]
[body appendData:[[NSString stringWithString:@"Content-Type: music/samr\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:fileData];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
// NSLog(@"%@",[NSString stringWithUTF8String:[body bytes]]);
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@",returnString);