ios - 在 json 数据中添加 InvoicID 新键和值

Question

这是我的 json 数据 http://pastie.org/10988178我想在特定项目中添加发票 ID。例如，如果一张发票有 3 个项目，则每个项目数组添加特定的 InvoiceID

"ItemDetails":[
{
"ItemId":1,
"ItemType":1,
"InvoiceDetailId":1,
"UPC":"UPCCODE1",
"SKU":"Item 1",
"Description":"Item Description",
"Qty":12,
"PunchListPart":"Item Part New if return item",
"Comment":"Comment1",
"BarCode":""
"InvoiceId":95
},

我想要这样的输出

这是我的代码，但无法运行

NSLog(@"item=%lu",[[ret_val valueForKey:@"ItemDetails" ] count]);
    NSArray *testarray=[ret_val valueForKey:@"ItemDetails" ];
    NSMutableArray *item=[[NSMutableArray alloc]init];
    for(int i=0; i<[[ret_val valueForKey:@"ItemDetails" ] count]; i++) {

        NSMutableDictionary *dictValues = [NSMutableDictionary dictionaryWithDictionary:testarray[i]];
        [dictValues setValue:[[ret_val objectForKey:@"InvoiceId"] objectAtIndex:i] forKey:@"InvoiceId"];
        [item addObject:dictValues];
    }
    NSLog(@"item=%@",item);

ret_val是我所有json数据中的NSMutableDictionary。

Answer 1

问题是 ret_val 是您的根 JSON Dictionary 并且您希望 InvoiceId 位于 data ret_val 字典的数组。因此，您需要使用 dataArray 访问它，您也可以使用 foreach 循环来减少代码。

NSMutableArray *items = [[NSMutableArray alloc] init];
NSArray *dataArray = [ret_val objectForKey:@"data"];
for (NSDictionary *dic in dataArray) {
     //Now loop through the `ItemDetails` array.
     NSArray *itemDetails = [dic objectForKey:@"ItemDetails"];
     for (NSDictionary *itemDic in itemDetails) {
          NSMutableDictionary *dictValues = [NSMutableDictionary dictionaryWithDictionary:itemDic];
          [dictValues setValue:[dic objectForKey:@"InvoiceId"] forKey:@"InvoiceId"];
          [items addObject:dictValues];
     }
}
NSLog(@"%@", items)