Android覆盖UnderlineSpan（）以覆盖而不是下划线

Question

我是Android的新手，我有这段代码强调了SpannableString。我想修改对象UnderlineSpan（），以便它覆盖Spannablestring而不是加下划线。所以基本上我希望它在字符串上而不是在字符串下面。我怎么能做到这一点？有没有其他方法可以做到这一点？感谢

    import SpriteKit

         import iAd

     import StoreKit
    var list = [SKProduct]()
    var p = SKProduct()
   class GameScene: SKScene, ADInterstitialAdDelegate, SKProductsRequestDelegate, SKPaymentTransactionObserver {
   getProductInfo()


      }

  func getProductInfo() {
    if(SKPaymentQueue.canMakePayments()) {
        print("IAP is enabled, loading")
        var productID:NSSet = NSSet(objects: "remove_ads")
        let request: SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>)
        request.delegate = self
        request.start()
    } else {
        print("please enable IAPS")
    }



}

func buyProduct() {
    print("buy " + p.productIdentifier)
    var pay = SKPayment(product: p)
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)
    SKPaymentQueue.defaultQueue().addPayment(pay as SKPayment)
}
func paymentQueue(queue: SKPaymentQueue, updatedDownloads downloads: [SKDownload]) {

}
   func paymentQueue(queue: SKPaymentQueue, removedTransactions transactions: [SKPaymentTransaction]) {

}
     func paymentQueue(queue: SKPaymentQueue, res    toreCompletedTransactionsFailedWithError error: NSError) {

}
   func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {

   }
   func productsRequest (request: SKProductsRequest, didReceiveResponse response: SKProductsResponse) {
    print("product request")
    var myProduct = response.products

    for product in myProduct {
        print("product added")
        print(product.productIdentifier)
        print(product.localizedTitle)
        print(product.localizedDescription)
        print(product.price)

        list.append(product as! SKProduct )
    }
}

func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue!) {
    print("transactions restored")

    var purchasedItemIDS = []
    for transaction in queue.transactions {
        var t: SKPaymentTransaction = transaction as! SKPaymentTransaction

        let prodID = t.payment.productIdentifier as String

        switch prodID {
        case "IAP id here": break


        default:
            print("IAP not setup")
        }

    }

    var alert = UIAlertView(title: "Thank You", message: "Your purchase(s) were restored. You may have to restart the app before banner ads are removed.", delegate: nil, cancelButtonTitle: "OK")
    alert.show()
}


func paymentQueue(queue: SKPaymentQueue!, updatedTransactions transactions: [AnyObject]!) {
    print("add paymnet")

    for transaction:AnyObject in transactions {
        var trans = transaction as! SKPaymentTransaction
        print(trans.error)

        switch trans.transactionState {

        case .Purchased, .Restored:
            print("buy, ok unlock iap here")
            //(prprint.productIdentifier)

            let prodID = p.productIdentifier as String
            switch prodID {
            case "IAP id here":


                var alert = UIAlertView(title: "Thank You", message: "You may have to restart the app before the banner ads are removed.", delegate: nil, cancelButtonTitle: "OK")
                alert.show()
            default:
                print("IAP not setup")
            }

            queue.finishTransaction(trans)
            break;
        case .Failed:
            print("buy error")
            queue.finishTransaction(trans)
            break;
        default:
            print("default")
            break;

        }
    }
}

func finishTransaction(trans:SKPaymentTransaction)
{
    print("finish trans")
}