ios 图片上传

NSError *parseError =nil;

NSDictionary *picInfoDict = [infoDicobjectForKey:@"PIC_INFO"];

   [infoDic removeObjectForKey:@"PIC_INFO"];

NSData* jsonData = [NSJSONSerializationdataWithJSONObject:picInfoDict  options:NSJSONWritingPrettyPrintederror:&parseError];

NSMutableURLRequest *request = [[NSMutableURLRequestalloc]init];

        [request setURL:[NSURLURLWithString:urlStr]];

        [request setHTTPMethod:@"POST"];

        NSMutableData *body = [NSMutableDatadata];

        NSString *boundary =@"---------------------------14737809831466499882746641449";

        NSString *contentType = [NSStringstringWithFormat:@"multipart/form-data; boundary=%@",boundary];

        [request addValue:contentTypeforHTTPHeaderField: @"Content-Type"];

        

        //写入INFO的内容

        [body appendData:[[NSStringstringWithFormat:@"--%@\r\n", boundary]dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:[[NSStringstringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",@"PIC_INFO"]dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:jsonData];

        [body appendData:[@"\r\n"dataUsingEncoding:NSUTF8StringEncoding]];

        

        for (int i=0; i<[infoDiccount]; i++) {

            //写入图片1的内容

            [body appendData:[[NSStringstringWithFormat:@"--%@\r\n", boundary]dataUsingEncoding:NSUTF8StringEncoding]];

            [body appendData:[[NSStringstringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@.jpg\"\r\n",[NSStringstringWithFormat:@"PIC_DATA%d",i+1],[NSStringstringWithFormat:@"PIC_DATA%d",i+1]]dataUsingEncoding:NSUTF8StringEncoding]];

            [body appendData:[@"Content-Type: image/jpeg\r\n\r\n"dataUsingEncoding:NSUTF8StringEncoding]];

            [body appendData:[infoDicobjectForKey:[NSString stringWithFormat:@"PIC_DATA%d",i+1]]];

            [body appendData:[[NSStringstringWithFormat:@"\r\n"]dataUsingEncoding:NSUTF8StringEncoding]];

        }

        

        //写入尾部内容

        [body appendData:[[NSStringstringWithFormat:@"--%@--\r\n", boundary]dataUsingEncoding:NSUTF8StringEncoding]];

        

        [request setHTTPBody:body];

        

        NSHTTPURLResponse *urlResponese =nil;

        NSError *error = [[NSErroralloc]init];

        NSData* resultData = [NSURLConnectionsendSynchronousRequest:request returningResponse:&urlResponeseerror:&error];

        

         NSDictionary *responseDic = [NSJSONSerializationJSONObjectWithData:resultData options:NSJSONReadingMutableLeaveserror:nil];