cannot navigate back to my App after paytm success

Question

I'm doing an IOS Application with Patym SDK, Transaction is happening successful but its not navigating back to app. Its showing an webview with " Redirect back to app ". anyone faced this issue before ?

Here is my code:

extension ShippingViewController : PGTransactionDelegate {


    func didCancelTrasaction(_ controller: PGTransactionViewController!) {
        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "confirmViewController") as! confirmViewController
        self.present(vc, animated: true, completion: nil)
    }

    func didFinishedResponse(_ controller: PGTransactionViewController!, response responseString: String!) {
        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "confirmViewController") as! confirmViewController
        self.present(vc, animated: true, completion: nil)
    }


    func errorMisssingParameter(_ controller: PGTransactionViewController!, error: Error!) {
        print(error)

        showAlert(title: "didCancelTrasaction", message: error.localizedDescription)
        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "CSWhoopsView") as! CSAlertViewController
        self.present(vc, animated: true, completion: nil)
    }


    func didFailTransaction(_ controller: PGTransactionViewController!, error: Error!, response: [AnyHashable : Any]!) {
        print(error)
        showAlert(title: "Transaction Failed", message: error.localizedDescription)
        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "CSWhoopsView") as! CSAlertViewController
        self.present(vc, animated: true, completion: nil)
    }
    func didCancelTransaction(_ controller: PGTransactionViewController!, error: Error!, response: [AnyHashable : Any]!) {

        showAlert(title: "Transaction Cancelled", message: error.localizedDescription)
        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "CSWhoopsView") as! CSAlertViewController
        self.present(vc, animated: true, completion: nil)

    }

    func didFinishCASTransaction(_ controller: PGTransactionViewController!, response: [AnyHashable : Any]!) {
         print("my response isis :" )
        print(response)
        showAlert(title: "cas", message: "")

    }

    func didSucceedTransaction(_ controller: PGTransactionViewController!, response: [AnyHashable : Any]!) {
         print("my response is :" )
        print(response)
        showAlert(title: "Transaction Successfull", message: NSString.localizedStringWithFormat("Response- %@", response) as String)

        let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "confirmViewController") as! confirmViewController
        self.present(vc, animated: true, completion: nil)
    }
}

Answer 1

According to this document: PayTM iOS SDK Integration Step, PGTransactionDelegate provides following methods to handle callback.

// On Successful Payment
func didSucceedTransaction(controller: PGTransactionViewController, response: [NSObject : AnyObject]) {              
    print(response)
    print("Response - \(response)")
    //removeController  - Close PayTM Controller here using dismiss or pop controller methods
}

// On Failure
func didFailTransaction(controller: PGTransactionViewController, error: NSError, response: [NSObject : AnyObject]) {
    print(response)
    if response.count == 0 {
        print(response.description)
    }
    else if error != 0 {
       print(error.localizedDescription)
    }
    //removeController  - Close PayTM Controller here using dismiss or pop controller methods
}


//On Cancellation
func didCancelTransaction(controller: PGTransactionViewController, error: NSError, response: [NSObject : AnyObject]) {
    print("Transaction has been Cancelled")
    //removeController  - Close PayTM Controller here using dismiss or pop controller methods     
}

func didFinishCASTransaction(controller: PGTransactionViewController, response: [NSObject : AnyObject]) {  
    print(response);    
}

Also one more importance point is: Paytm CALLBACK_URL - This url is provided by Paytm so app can read the data from paytm and return.

Note: Since recent updates in SDK here are PGTransactionDelegate methods (in Objective-C)

@protocol PGTransactionDelegate <NSObject>

@required
//Called when a transaction has completed. response dictionary will be having details about Transaction.

-(void)didFinishedResponse:(PGTransactionViewController *)controller response:(NSString *)responseString;

//Called when a user has been cancelled the transaction.

-(void)didCancelTrasaction:(PGTransactionViewController *)controller;

//Called when a required parameter is missing.

-(void)errorMisssingParameter:(PGTransactionViewController *)controller error:(NSError *) error;

@end

Edit:

Replace following delegate implementation in your code.

func didSucceedTransaction(_ controller: PGTransactionViewController!, response: [AnyHashable : Any]!) {
 print("my response is :" )
print(response)
showAlert(title: "Transaction Successfull", message: NSString.localizedStringWithFormat("Response- %@", response) as String)


    controller.dismiss(animated: true) {
       let vc =  UIStoryboard(name: "account", bundle: nil).instantiateViewController(withIdentifier: "confirmViewController") as! confirmViewController
       self.present(vc, animated: true, completion: nil)
    }


}