检查用户是否取消了SKPaymentTransaction

Question

如何检查用户是否点击了取消按钮(当他被问到是否要购买smth时,或者他是否已购买此SKProduct是否要下载它)？

现在我只是在paymentQueue:updatedTransactions:方法中收到SKPaymentTransactionStateFailed,用户点击取消按钮后,例如没有互联网时.有什么方法可以区分这两种情况？

Answer 1

这段代码适合我:

if (transaction.error.code != SKErrorPaymentCancelled) {
    NSLog(@"Other error");
} else {
    NSLog(@"User canceled");
}

Answer 2

艾伦的答案是完美的.以防有人想知道其他案件

switch (transaction.error.code) {
   case SKErrorUnknown:
       //Unknown error
       break;
   case SKErrorClientInvalid:
       // client is not allowed to issue the request, etc.
       break;
   case SKErrorPaymentCancelled:
       // user cancelled the request, etc.
       break;
   case SKErrorPaymentInvalid:
       // purchase identifier was invalid, etc.
       break;
   case SKErrorPaymentNotAllowed:
       // this device is not allowed to make the payment
       break;
   default:
       break;
}

Answer 3

这是Swift 3.0上的工作代码:

if let error = transaction.error as? NSError {
    if error.domain == SKErrorDomain {
        // handle all possible errors
        switch (error.code) {
        case SKError.unknown.rawValue:
            print("Unknown error")
        case SKError.clientInvalid.rawValue:
            print("client is not allowed to issue the request")
        case SKError.paymentCancelled.rawValue:
            print("user cancelled the request")
        case SKError.paymentInvalid.rawValue:
            print("purchase identifier was invalid")
        case SKError.paymentNotAllowed.rawValue:
            print("this device is not allowed to make the payment")
        default:
            break;
        }
    }
}

Answer 4

error检查设置的SKPaymentTransaction属性。

@property(非原子，只读) NSError *错误

描述处理事务时发生的错误的对象。（只读）

除非 transactionState 设置为 SKPaymentTransactionStateFailed，否则错误属性未定义。您的应用程序可以读取错误属性来确定事务失败的原因。

此外，您可能希望在启动交易之前使用 Apple 的 Reachability 类来确定互联网是否可用。