Is an observer needed for IAP?

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Created Aug ’16

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I'm new to IAP. I want to restore transactions so I start by putting the line below in a button:

[[SKPaymentQueue defaultQueue]restoreCompletedTransactions];

Examples have stated I need to set up an observer using one more line

[[SKPaymentQueue defaultQueue] addTransactionObserver:self];

[[SKPaymentQueue defaultQueue]restoreCompletedTransactions];

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Answer 1

imsmooth OP

Aug ’16

I can't seem to be able to edit my message:

I'm new to IAP. I want to restore transactions so I start by putting the line below in a button:

[[SKPaymentQueue defaultQueue]restoreCompletedTransactions];

Examples have stated I need to set up an observer using one more line

[[SKPaymentQueue defaultQueue] addTransactionObserver:self];

[[SKPaymentQueue defaultQueue]restoreCompletedTransactions];

The thing is using just one line without the observer works. Am I missing something?

Is this because I'm not observing, but initiating the search for paid transactions myself? That the observer is only if I want the app to automatically restore purchases without the user needing to press a button checking if there are paid purchases?

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