The following extract is from the Apple documents how to restore in App purchases in iOS 7. They say that you can store the receipts and find out later what they user already bought or you can refresh the App Receipt. My questions are:
1) Is there the one app receipt or are there many single receipt?
2) Does it make more sense to store these receipts instead of just storing directly which features the user has already bought
3) How can I examine the receipt that I get from that refresh? All my tries to parse it failed so far.
4) Is there any framework that has a lot of features (saving receipts / bought products on iCloud, making purchases easier, handling downloads, handling all kinds of connection problems, etc.) already? Maybe even with remote server support (and validation).
I hope somebody can help! :)
Refreshing the App Receipt
Create a receipt refresh request, set a delegate, and start the request. The request supports optional properties for obtaining receipts in various states during testing such as expired receipts—for details, see the values for the initWithReceiptProperties: method of SKReceiptRefreshRequest.
request = [[SKReceiptRefreshRequest alloc] init];
request.delegate = self;
[request start];
After the receipt is refreshed, examine it and deliver any products that were added.
1) Is there the one app receipt or are there many single receipt?
There is a single app receipt. Before that, Apple provided receipts for each transaction. Those receipts still exist but are deprecated.
2) Does it make more sense to store these receipts instead of just storing directly which features the user has already bought
Not anymore (for iOS 7 apps).
3) How can I examine the receipt that I get from that refresh? All my tries to parse it failed so far.
This is a complex issue. I suggest reading this unapologetically long answer: https://stackoverflow.com/a/20039394/143378.
4) Is there any framework that has a lot of features (saving receipts / bought products on iCloud, making purchases easier, handling downloads, handling all kinds of connection problems, etc.) already? Maybe even with remote server support (and validation).
There are 3 that I'm aware of:
To date, MKStoreKit appears abandoned and CargoBay doesn't support app receipts. CargoBay has features that RMStore hasn't, and viceversa. I'd check them both and see which one fits your requirements better.
In any case, I recommend reading the StoreKit documentation before using any libraries. The libraries provide code, not understanding.
Disclaimer: I developed RMStore.
来源：https://stackoverflow.com/questions/21566425/ios-restore-in-app-purchases-with-receipts