如何在打字稿中访问枚举的名称

Posted 2021-04-05

我使用的库有一个如下所示的emum：

/** Defines values that represent the status of a request to purchase an app or add-on. */
enum StorePurchaseStatus {
    /** The current user has already purchased the specified app or add-on. */
    alreadyPurchased = 1,
    /** The purchase request did not succeed because of a network connectivity error. */
    networkError = 3,
    /** The purchase request did not succeed. */
    notPurchased = 2,
    /** The purchase request did not succeed because of a server error returned by the Windows Store. */
    serverError = 4,
    /** The purchase request succeeded. */
    succeeded = 0,
}

我有数字值，我想打印名称（例如，我的状态为1，并希望打印'已购买'）。

但是，当我做这样的事情时：

StorePurchaseStatus[1]

我最终得到了undefined。如果我只有值，我该如何访问字符串名称？

答案

你在原帖中写的方式很好。你可以查看这个Playground example。

以下是访问名称和值的方法：

alert(StorePurchaseStatus[1]); // alreadyPurchased
alert(StorePurchaseStatus[StorePurchaseStatus[1]]);// 1