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);