iPhone In-App Purchase Store Kit error -1003 "Cannot connect to iTunes Store"
Solution 1:
I had a similar situation and dumped the iPhone's network traffic to see what's going on. I found that the normal store was contacted instead of the sandbox. It helped to delete the app from the device, make clean and build/install it again. Apparently something with the development profile had gone wrong.
Update: To dump the network traffic of a non-jailbroken iPhone, just use Internet Sharing on your Mac and configure your iPhone to use your Mac's WiFi. Then tcpdump -n -i en1on your Mac will do the trick.
Solution 2:
If you're getting error 0 "Cannot connect to iTunes Store" (which I realize is not the error -1003 that OP asked about, but a web search for error 0 also leads here), this can be caused by two possible problems:
- You're passing in the wrong product identifier. If that's the case, then you'll get error 0 shortly after calling
-[SKPaymentQueue addPayment:], before you get the popup asking you to confirm payment. - Your test user has become invalidated. This can happen if you accidentally log into the App Store with your test user. When this happens, you'll get error 0 after entering your password to confirm your payment.
To fix problem #1, pass in the correct product ID. To fix problem #2, create a new test user on iTunes Connect, and optionally delete the old test user.