如何从数组中查找值的索引[重复]

Question

假设我是searching for cardType = points，如果找到它我想知道那个对象的索引位置。根据给定的示例数组，该对象的索引位置为 1。下面是示例数组。

[{
cardCode = MGC;
cardId = 5720663d8944bf6710c9d894;
cardType = gift;
},
{
cardCode = MPC;
cardId = 5720663d8944bf6710c9d898;
cardType = points;
}, 
{
cardCode = MAC;
cardId = 5720663d8944bf6710c9d895;
cardType = advantage;
},
{
cardCode = MCC;
cardId = 5720663d8944bf6710c9d897;
cardType = cashback;
}]

Answer 1

您可以为此使用index(where:)。

if let index = yourArray.index(where: { $0.cardType == "points" }) {
    print(index) //1
}