在iOS 9.3 / Xcode 7.3中使用StoreKit常量时使用未解析的标识符 [英] Use of unresolved identifier when using StoreKit constants with iOS 9.3/Xcode 7.3

问题描述

在尝试使用其中一个StoreKit常量时，我​​收到错误使用未解析的标识符：

I get the error "Use of unresolved identifier" when trying to use one of these StoreKit constants:

SKErrorClientInvalid
SKErrorPaymentCancelled
SKErrorPaymentInvalid
SKErrorPaymentNotAllowed
SKErrorStoreProductNotAvailable
SKErrorUnknown

您的代码可能如下所示：

Your code may look like this:

if transaction.error!.code == SKErrorPaymentCancelled {
    print("Transaction Cancelled: \(transaction.error!.localizedDescription)")
}

改变了什么？我需要导入一个新模块吗？

What changed? Is there a new module I need to import?

推荐答案

从iOS 9.3开始，某些StoreKit常量已从SDK中删除。有关完整列表，请参见针对Swift的StoreKit更改更改。

As of iOS 9.3 certain StoreKit constants have been removed from the SDK. See StoreKit Changes for Swift for the full list of changes.

这些常量已被替换为 SKErrorCode 枚举及相关值：

These constants have been replaced in favor of the SKErrorCode enum and associated values:

SKErrorCode.ClientInvalid
SKErrorCode.CloudServiceNetworkConnectionFailed
SKErrorCode.CloudServicePermissionDenied
SKErrorCode.PaymentCancelled
SKErrorCode.PaymentInvalid
SKErrorCode.PaymentNotAllowed
SKErrorCode.StoreProductNotAvailable
SKErrorCode.Unknown

您应该检查使用枚举的 rawValue 检查 transaction.error.code 。示例：

You should check be checking your transaction.error.code with the enum's rawValue. Example:

private func failedTransaction(transaction: SKPaymentTransaction) {
    print("failedTransaction...")
    if transaction.error?.code == SKErrorCode.PaymentCancelled.rawValue {
        print("Transaction Cancelled: \(transaction.error?.localizedDescription)")
    }
    else {
        print("Transaction Error: \(transaction.error?.localizedDescription)")
    }
    SKPaymentQueue.defaultQueue().finishTransaction(transaction)
}

如果在iOS 9.3及更高版本上使用StoreKit创建新应用程序，则应检查这些错误代码而不是旧常量。

You should be checking against these error codes rather than the legacy constants if creating a new application using StoreKit on iOS 9.3 and above.

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