目标C：NSDictionnary无序

Question

我从一个API接收一个json格式对象的数组，所以我把它放在一个NSDictionnary中，问题是它与收到的声音的顺序不一样。如何恢复订单？我尝试了以下代码：

- (void)connectionManagerDidGotPriceList:(NSDictionary *)prices{
NSArray *sortedKeys = [prices.allKeys sortedArrayUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"self" ascending:YES]]];

NSArray *sortedValues = [prices objectsForKeys:sortedKeys notFoundMarker:@""];

list_categories = sortedKeys;
list = sortedValues;
[priceList reloadData];

}

但是我得到了这个错误

因未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [__ NSArrayI floatValue]：无法识别的选择器发送到实例0x60000399ab20'

如何保持与NSDictionary中收到的声音相同的顺序？

来自服务器的Json响应：

     {
   "status":true,
   "data":{
      "גיהוץ":[
         {
            "PriceListId":9,
            "ItemTypeId":18,
            "JobTypeId":5,
            "price":8.00,
            "LondryId":0,
            "ItemTypeDescription":"חולצה",
            "JobTypeDescription":"גיהוץ",
            "LondryName":""
         },
         {
            "PriceListId":962,
            "ItemTypeId":41,
            "JobTypeId":7,
            "price":40.00,
            "LondryId":0,
            "ItemTypeDescription":"מפה",
            "JobTypeDescription":"כביסה וגיהוץ",
            "LondryName":""
         }
      ],
      "ניקוי יבש":[
         {
            "PriceListId":15,
            "ItemTypeId":18,
            "JobTypeId":6,
            "price":28.00,
            "LondryId":0,
            "ItemTypeDescription":"חולצה",
            "JobTypeDescription":"ניקוי יבש",
            "LondryName":""
         },
         {
            "PriceListId":16,
            "ItemTypeId":19,
            "JobTypeId":6,
            "price":30.00,
            "LondryId":0,
            "ItemTypeDescription":"מכנסים",
            "JobTypeDescription":"ניקוי יבש",
            "LondryName":""
         },
         {
            "PriceListId":835,
            "ItemTypeId":99,
            "JobTypeId":6,
            "price":38.00,
            "LondryId":0,
            "ItemTypeDescription":"סווטשירט",
            "JobTypeDescription":"ניקוי יבש",
            "LondryName":""
         }
      ],
      "כביסה וקיפול":[
         {
            "PriceListId":128,
            "ItemTypeId":22,
            "JobTypeId":8,
            "price":66.00,
            "LondryId":0,
            "ItemTypeDescription":"שק כביסי אחד (עד 6 ק\"ג)",
            "JobTypeDescription":"כביסה וקיפול",
            "LondryName":""
         },
         {
            "PriceListId":956,
            "ItemTypeId":104,
            "JobTypeId":8,
            "price":99.00,
            "LondryId":0,
            "ItemTypeDescription":"שק כביסי אחד (עד 9 ק\"ג)",
            "JobTypeDescription":"כביסה וקיפול",
            "LondryName":""
         }
      ],
      "כביסה עדינה":[
         {
            "PriceListId":855,
            "ItemTypeId":102,
            "JobTypeId":83,
            "price":9.00,
            "LondryId":0,
            "ItemTypeDescription":"כביסה עדינה וייבוש בתליה יח'",
            "JobTypeDescription":"כביסה עדינה",
            "LondryName":""
         }
      ]
   },
   "message":""
}

Answer 1

你可以这样解决：

NSMutableArray *dataArr = @[].mutableCopy;
for (int i = 0 ; i < data.allKeys.count; i++) {
    NSString *key = data.allKeys[i];
    NSMutableDictionary *dataForKey = [data[key] mutableCopy];
    dataForKey[@"Key"] = key;
    [dataArr addObject:dataForKey];
}

NSSortDescriptor *desc = [NSSortDescriptor sortDescriptorWithKey:@"Key" ascending:YES];
dataArr =[dataArr sortUsingDescriptors:@[desc]];

您可以将json从服务器获取的转换数据转换为NSDictionary，然后使用此循环将所有项添加到数组中，然后使用Key对这些项进行排序。