ios中将字典放入到数组中，再将数组加入到字典中，再将整个字段转成json格式的。（网上比较少的实例）

                            //    NSMutableArray *mutArr = [NSMutableArray array];                            //    [mutArr addObject:dict];                            //                               //    NSMutableDictionary *dictbbb =[[NSMutableDictionary alloc]init];                            //    [dictbbb setObject:mutArr  forKey:@"person"];                            //    NSLog(@"dictbbb is %@",dictbbb);                            //                                //                                //    NSData *dictData1 = [NSJSONSerialization dataWithJSONObject:dictbbb options:NSJSONWritingPrettyPrinted error:nil];                            //    NSString *jsonString1= [[NSString alloc]initWithData:dictData1 encoding:NSUTF8StringEncoding];                            //                                //    NSLog(@"jsonbbbb str is %@",jsonString1);                            //                                //                                //                              //    NSData* xmlData = [jsonString1 dataUsingEncoding:NSUTF8StringEncoding];                            //    NSMutableArray *mutDict1 = [NSJSONSerialization JSONObjectWithData:xmlData options:(NSJSONReadingMutableLeaves) error:nil];                            //                            //    NSLog(@"mutdicr1  是%@",mutDict1);//    NSDictionary *dictaaaaa  = [mutDict1  objectForKey:@"name" ];         //    NSString *name2 = [perDict objectForKey:@"name"];    //    NSLog(@"姓名是：%@",name2);

=====要结合上篇博客看，不然还有点摸不着头脑。