添加来自 NSMutableDictonary 的特定键的值(使用 NSPredicate)

ADDITION of values of the specific key from NSMutableDictonary (Using NSPredicate)

我有以下 JSON 响应已存储在 NSMutableDictonary 中。我想加上 special_item 的所有 价格

{
    "order_id": "1",
    "order_name": "xyz",
    "order_item": [
        {
            "item_id": "1",
            "item_name": "myone",
            "special_item": [
                {
                    "s_item_id": "1",
                    "price": "10"
                },
                {
                    "s_item_id": "2",
                    "price": "100"
                }
            ]
        },
        {
            "item_id": "2",
            "item_name": "mytwo",
            "special_item": [
                {
                    "s_item_id": "11",
                    "price": "15"
                },
                {
                    "s_item_id": "22",
                    "price": "110"
                }
            ]
        }
    ]
}

是否可以使用 NSPredicate 添加所有 price?或者如何使用 NSPredicate 获取所有 price 值的数组?(例如:[@10,@100,@15,@110])

谢谢!

NSInteger *total=0;
NSArray *arr=[NSDictionary objectForKey=@"order_item"];
for(NSDictionary *dic in arr){
    NSArray *array=[dic objectForKey=@"special_item"];
    for(NSDictionary *d in array){
        total=total+[[d objectForKey=@"price"] intValue];
    }
}
NSLog("Total:- %d",total);

就是这么简单

你可以试试下面的代码

NSArray *arr = [dix valueForKeyPath:@"order_item.special_item.price"];
long total = 0;
for (id price in arr) {
    if ([price isKindOfClass:[NSArray class]]) {
        total += [[price valueForKeyPath:@"@sum.self"] longValue];
    }
    else {
        total += [price longValue];
    }
}