iOS多图片上传详解手机开发

    +(NSString *)PostImagesToServer:(NSString *) strUrl dicPostParams:(NSMutableDictionary *)params dicImages:(NSMutableDictionary *) dicImages{   
        NSString * res;   
           
           
        //分界线的标识符   
        NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";   
        //根据url初始化request   
        //NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:strUrl] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];   
           
        NSURL *url = [NSURL URLWithString:strUrl];   
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];   
        //分界线 --AaB03x   
        NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];   
        //结束符 AaB03x--   
        NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];   
        //要上传的图片   
        UIImage *image;//=[params objectForKey:@"pic"];   
        //得到图片的data   
        //NSData* data = UIImagePNGRepresentation(image);   
        //http body的字符串   
        NSMutableString *body=[[NSMutableString alloc]init];   
        //参数的集合的所有key的集合   
        NSArray *keys= [params allKeys];   
           
        //遍历keys   
        for(int i=0;i<[keys count];i++) {   
            //得到当前key   
            NSString *key=[keys objectAtIndex:i];   
            //如果key不是pic，说明value是字符类型，比如name：Boris   
            //if(![key isEqualToString:@"pic"]) {   
                //添加分界线，换行   
                [body appendFormat:@"%@/r/n",MPboundary];   
                //添加字段名称，换2行   
                [body appendFormat:@"Content-Disposition: form-data; name=/"%@/"/r/n/r/n",key];   
                //[body appendString:@"Content-Transfer-Encoding: 8bit"];   
                //添加字段的值   
                [body appendFormat:@"%@/r/n",[params objectForKey:key]];   
            //}   
        }   
        ////添加分界线，换行   
        //[body appendFormat:@"%@/r/n",MPboundary];   
           
        //声明myRequestData，用来放入http body   
        NSMutableData *myRequestData=[NSMutableData data];   
        //将body字符串转化为UTF8格式的二进制   
        [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];   
           
        //循环加入上传图片   
        keys = [dicImages allKeys];   
        for(int i = 0; i< [keys count] ; i++){   
            //要上传的图片   
            image = [dicImages objectForKey:[keys objectAtIndex:i ]];   
            //得到图片的data   
            NSData* data =  UIImageJPEGRepresentation(image, 0.0);   
            NSMutableString *imgbody = [[NSMutableString alloc] init];   
            //此处循环添加图片文件   
            //添加图片信息字段   
            //声明pic字段，文件名为boris.png   
            //[body appendFormat:[NSString stringWithFormat: @"Content-Disposition: form-data; name=/"File/"; filename=/"%@/"/r/n", [keys objectAtIndex:i]]];   
               
            ////添加分界线，换行   
            [imgbody appendFormat:@"%@/r/n",MPboundary];   
            [imgbody appendFormat:@"Content-Disposition: form-data; name=/"File%d/"; filename=/"%@.jpg/"/r/n", i, [keys objectAtIndex:i]];   
            //声明上传文件的格式   
            [imgbody appendFormat:@"Content-Type: application/octet-stream; charset=utf-8/r/n/r/n"];   
               
            NSLog(@"上传的图片：%d  %@", i, [keys objectAtIndex:i]);   
               
            //将body字符串转化为UTF8格式的二进制   
            //[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];   
            [myRequestData appendData:[imgbody dataUsingEncoding:NSUTF8StringEncoding]];   
            //将image的data加入   
            [myRequestData appendData:data];   
            [myRequestData appendData:[ @"/r/n" dataUsingEncoding:NSUTF8StringEncoding]];   
        }   
        //声明结束符：--AaB03x--   
        NSString *end=[[NSString alloc]initWithFormat:@"%@/r/n",endMPboundary];   
        //加入结束符--AaB03x--   
        [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];   
           
        //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"];   
        //[request setValue:@"keep-alive" forHTTPHeaderField:@"connection"];   
        //[request setValue:@"UTF-8" forHTTPHeaderField:@"Charsert"];   
        //设置Content-Length   
        [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];   
        //设置http body   
        [request setHTTPBody:myRequestData];   
        //http method   
        [request setHTTPMethod:@"POST"];   
           
        //建立连接，设置代理   
        //NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];   
           
        //设置接受response的data   
             NSData *mResponseData;   
        NSError *err = nil;   
        mResponseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&err];   
           
        if(mResponseData == nil){   
            NSLog(@"err code : %@", [err localizedDescription]);   
        }   
        res = [[NSString alloc] initWithData:mResponseData encoding:NSUTF8StringEncoding];   
        /*  
        if (conn) {  
            mResponseData = [NSMutableData data];  
            mResponseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&err];  
              
            if(mResponseData == nil){  
                NSLog(@"err code : %@", [err localizedDescription]);  
            }  
            res = [[NSString alloc] initWithData:mResponseData encoding:NSUTF8StringEncoding];  
        }else{  
            res = [[NSString alloc] init];  
        }*/   
        NSLog(@"服务器返回：%@", res);   
        return res;   
    }