title: what is the alternative solution for paymentWithProductIdentifier?
body: <p>Hi i am using in APP purchase in my project . When i run this project everything works fine, except i am getting a warning message saying that "paymentWithProductIdentifier is deprecated", I gone through the similar questions that are asked in stack overflow but i didn't satisfied. I shown you my coding that i used in the project below</p>
  
  <pre><code>SKPayment *payment=[SKPayment paymentWithProductIdentifier:@"com.mycompany.dmaker.maker1"];
  [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
  [[SKPaymentQueue defaultQueue] addPayment:payment];
  </code></pre>
  
  <p>Can anyone tell me
   1)the alternative for this warning. 
  2)or tell me whether this project approve in appstore if i use this existing code.</p>