我有一个问题，http Post request情况如下：
我必须在此处发送带有文本和 Img 的发布请求，代码如下：
NSMutableURLRequest *eventRequest = [NSMutableURLRequest requestWithURL:_urlRequest cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:500];
NSString *boundary = @"---------------------------14737809831466499882746641449";
//Set header Http POST
[eventRequest setHTTPMethod:@"POST"];
[eventRequest setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]forHTTPHeaderField:@"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter1\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[self postParametre] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
//Image upload
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: immage/jpg \r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; filename=\"immagine.jpg\""dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:data];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// Close boundary
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// set request body
[eventRequest setHTTPBody:body];
NSString* string = [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding];
NSLog(@"Stampa Dati inviati: %@", string);
// Http header Content-Lenght
[eventRequest setValue:[NSString stringWithFormat:@"%i",[data length]] forHTTPHeaderField:@"Content-Length"];
self.theConnection=[[NSURLConnection alloc] initWithRequest:eventRequest delegate:self];
if (self.theConnection) {
self.receivedData = [[NSMutableData data] retain];
} else {
// Inform the user that the connection failed.
NSLog(@"Connection Problem");
}
可以看到我设置了我"Content-Type"在正文的第一部分设置了多部分/表单数据，我设置了 che 文本，在第二部分我设置了图像，但是图像正确上传但没有“扩展名”，并且在第一部分我设置了要发送的文本，但显然未设置文本或格式未读取到服务器。
该方法[self postParametre]返回NSMutableString格式为“key1=value1&key2=value2&key3=value3”的a。
任何人都可以帮助我吗？
问候。