用于检查是否在数组中找到特定 id 的 For 循环

Question

我需要检查数组列表中的 id ，id 之前已经生成，只是我需要与稍后生成的响应进行比较，例如：“defaultcardid”是之前生成的 id，所以我需要比较“defaultcard”稍后回复。

我收到一个“卡片列表”作为“Anyobject”响应。 所以需要检查“cardlist”数组中的“defaultcardid”。

if let xlist = (cardlist.value(forKey: "data")as? NSArray)
{
    for 0 .. i in xlist
    {
        cardfinder.adding((xlist.object(at: id)as AnyObject).value(forKey: "id")as! String)
    }
}

cardfinder 是一个 NSMUTABLEARRAY，用于将特定的 id 存储到一个数组中。

我儿子的回答如下

{
"status": "success",
"data": [
    {
        "id": "card_1D42hlLJSnYRR6BMULHyeobB",
        "object": "card",
        "address_city": null,
        "address_country": null,
        "address_line1": null,
        "address_line1_check": null,
        "address_line2": null,
        "address_state": null,
        "address_zip": null,
        "address_zip_check": null,
        "brand": "Visa",
        "country": "US",
        "customer": "cus_DV2VCweBfI1dH0",
        "cvc_check": "pass",
        "dynamic_last4": null,
        "exp_month": 12,
        "exp_year": 2019,
        "fingerprint": "FwLfSpHMDz1b3PTH",
        "funding": "debit",
        "last4": "5556",
        "metadata": {},
        "name": null,
        "tokenization_method": null
    },
    {
        "id": "card_1D441WLJSnYRR6BMNpOsFgg0",
        "object": "card",
        "address_city": null,
        "address_country": null,
        "address_line1": null,
        "address_line1_check": null,
        "address_line2": null,
        "address_state": null,
        "address_zip": null,
        "address_zip_check": null,
        "brand": "Visa",
        "country": "US",
        "customer": "cus_DV2VCweBfI1dH0",
        "cvc_check": "pass",
        "dynamic_last4": null,
        "exp_month": 12,
        "exp_year": 2019,
        "fingerprint": "dvLGAxROCikDisQx",
        "funding": "credit",
        "last4": "0093",
        "metadata": {},
        "name": null,
        "tokenization_method": null
    },
    {
        "id": "card_1D42RjLJSnYRR6BMgSELUUut",
        "object": "card",
        "address_city": null,
        "address_country": null,
        "address_line1": null,
        "address_line1_check": null,
        "address_line2": null,
        "address_state": null,
        "address_zip": null,
        "address_zip_check": null,
        "brand": "Visa",
        "country": "US",
        "customer": "cus_DV2VCweBfI1dH0",
        "cvc_check": "pass",
        "dynamic_last4": null,
        "exp_month": 12,
        "exp_year": 2019,
        "fingerprint": "NnWxCq6FamUKl226",
        "funding": "credit",
        "last4": "4242",
        "metadata": {},
        "name": null,
        "tokenization_method": null
    }
]

}

所有对象都有名为“id”的字段我已经有一个默认的 id = card_1D42RjLJSnYRR6BMgSELUUut ，我需要准确地接受我的卡是哪个对象。 所以我需要一个 for 循环来检查数组中的所有对象。

Answer 1

您可以简单地调用array上的contains方法来检查其中是否存在值。 实现取决于您正在检查的array类型。

例子：

让我们假设"123" is the default id 。

var cardList1 = ["123", "abc", "xyz"]
cardList1.contains("123") //true
cardList1.contains("456") //false

var cardList2 = [["id": "123"], ["id": "abc"], ["id": "xyz"]]
cardList2.contains {                //true
    return $0["id"] == "123"
}
cardList2.contains {                //false
    return $0["id"] == "564"
}

如果您遇到任何问题，请告诉我。