谁能帮助我在Swift 4.0 iOS中使用Paytm付款网关

Question

这是代码和错误

orderDict [“ MID”] =“ eXpITP11198467212711”

  

     //Merchant configuration in the order object
    orderDict["CHANNEL_ID"] = "WAP"
    orderDict["INDUSTRY_TYPE_ID"] = "Retail109"
    orderDict["WEBSITE"] = "eXpITPWAP"
     //Order configuration in the order object
    orderDict["TXN_AMOUNT"] = "5"
    orderDict["ORDER_ID"] = "1233"
    orderDict["REQUEST_TYPE"] = "DEFAULT"
    orderDict["CUST_ID"] = "1213"
    orderDict["REQUEST_TYPE"] = "DEFAULT"

    orderDict["CALLBACK_URL"] =

         

“ 9z2JoKHj85TpRxJifYIKuNz5hOoAR9g6ryefLigxtXX74oquWZpBxd / O + 9r8blDNj / 3aD5E1ZKSqPNJ5lRR1lqqKw7rGvdKIspOnaXTLvmE =”             orderDict [“ CUST_ID”] =“     https://securegw.paytm.in/theia/paytmCallback?ORDER_ID=1233”