iOS 图片上传

/****
 1，  服务器url
 2，  图片 测试的话可以在项目中加入一张图片
 3，  图片的信息对应的  key  必须跟服务器保持一致
 4，  上传类型 mimeType
 5，  字典数据  params
 
 NSArray *keys=[NSArray arrayWithObjects:@"userId",@"fileType",nil];
 NSArray *objects=[NSArray arrayWithObjects:@"123456",@"headImg", nil];
 NSDictionary *params=[NSDictionary dictionaryWithObjects:objects forKeys:keys];
 */
- (void)upload:(NSString *)url  uploadImage:(UIImage*)image   keyImgName:(NSString *)name mimeType:(NSString *)mimeType  parmas:(NSDictionary *)params
 {
   
     //此处是对图片进行压缩,压缩的 比例是公司自己对于上传图片的标准要求
     NSData *imageData = UIImageJPEGRepresentation(image, 0.1);
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
                                                            cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                                        timeoutInterval:30];
     request.HTTPMethod = @"POST";
     
     //声明myRequestData，用来放入http body
     NSMutableData *myRequestData=[NSMutableData data];
     
     /****************************** 标识定义 *********************************************/
     //分界线的标识符
     NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";
     //分界线 --AaB03x
     NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];
     //结束符 AaB03x--
     NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
     /********************************* 数据部分 ******************************************/
     //http 数据部分
     NSMutableString *paraBody=[[NSMutableString alloc]init];
     //参数的集合的所有key的集合
     NSArray *keysda= [params allKeys];
     //遍历keys
     for(int i = 0; i < [keysda count] ; i++)
     {
         //得到当前key
         NSString *key=[keysda objectAtIndex:i];
         //添加分界线，换行
         [paraBody appendFormat:@"%@\r\n",MPboundary];
         //添加字段名称，换2行
         [paraBody appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];
         //添加字段的值
         [paraBody appendFormat:@"%@\r\n",[params objectForKey:key]];
         [paraBody appendFormat:@"%@\r\n",endMPboundary];
         
         NSLog(@"数据打印：  %@ == %@",key,[params objectForKey:key]);
     }
     //将body字符串转化为UTF8格式的二进制
     [myRequestData appendData:[paraBody dataUsingEncoding:NSUTF8StringEncoding]];
     
     /********************************* 图片数据 ******************************************/
     //http 图片body
     NSMutableString *body=[[NSMutableString alloc]init];
     //添加开始分界线，
     [body appendFormat:@"%@\r\n",MPboundary];
     //声明keyImgName字段，文件名为 当前时间.png
     NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
     formatter.dateFormat=@"yyyyMMddHHmmss";
     NSString *str=[formatter stringFromDate:[NSDate date]];
     NSString *fileName=[NSString stringWithFormat:@"%@.jpg",str];
     [body appendFormat:@"%@", [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n",name,fileName]];
     //声明上传文件的格式
     [body appendFormat:@"Content-Type: %@\r\n\r\n",mimeType];
     
     NSLog(@"-----网络请求图片 body:  %@",body);
     //声明结束符：--AaB03x--
     NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];
     //将body字符串转化为UTF8格式的二进制
     [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
     //将image的data加入
     [myRequestData appendData:imageData];
     //加入结束符--AaB03x--
     [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
     /********************************* http header  content-Leng body 设置 ******************************************/
     //设置HTTPHeader中Content-Type的值
     NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];
     //设置HTTPHeader
     [request setValue:content forHTTPHeaderField:@"Content-Type"];
     //设置Content-Length
     [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];
     //设置http body
     [request setHTTPBody:myRequestData];
     
     
     /********************************* http 任务开始 并监听返回数据 打印 ******************************************/
     NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
     NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig delegate:self delegateQueue:nil];
     NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
         //网络请求失败
         if (error != nil) {
             return;
         }
         //成功进行解析
         NSMutableDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
         NSLog(@"%@--%@",dic, response);
         NSLog(@"图片地址：   %@ ",[dic objectForKey:@"url"]);
//         NSString *  severImageUrl = [[NSString alloc]initWithFormat:@"%@",[dic objectForKey:@"url"]];
//         return severImageUrl;
     }];
     
     [task resume];
 }