NSString *boundry = @"boundry";//分節符

    NSMutableURLRequest *mutableRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"服務器地址"]];

    [mutableRequest setHTTPMethod:@"POST"];

    NSMutableDictionary *head = [NSMutableDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundry],@"Content-Type",nil];

    [mutableRequest setAllHTTPHeaderFields:head];

    NSMutableString *mutableString = [[NSMutableString alloc] init];

    [mutableString appendFormat:@"--%@/r/n", boundry];

    [mutableString appendFormat: @"Content-Disposition: form-data; name=/"image/"; filename=/"image.png/"/r/n/r/n"];//name + filename 自己看著來，其他就不要換了    

    NSMutableData *postData = [NSMutableData dataWithCapacity:[imageData length] + 512];

    [postData appendData:[mutableString dataUsingEncoding:NSUTF8StringEncoding]];

    [postData appendData:imageData];//插入要上傳的文件數據（NSData）

    [postData appendData:

     [[NSString stringWithFormat:@"/r/n--%@--/r/n", boundry] dataUsingEncoding:NSUTF8StringEncoding]];

    [mutableRequest setHTTPBody:postData];

    NSData *received = [NSURLConnection sendSynchronousRequest:mutableRequest returningResponse:nil error:nil];