How do you add an in-app purchase to an iOS application?

How do you add an in-app purchase to an iOS application?

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A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7

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"Cannot connect to iTunes Store" in-app purchases

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iTunes account creation not allowed when trying to test In-App Purchases

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Use in_app or latest_receipt_info for getting latest receipt for auto-renewable iOS 7 style transactions?

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Unable to log in with sandbox test users on device

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Convert existing iOS paid app to freemium model with in-app purchase

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Reasons for SKProductsRequest returning 0 products?

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How does Apple notify iOS apps of refunds of in-app purchases (IAP)?

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When to use restoreCompletedTransactions for in-app purchases?

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Link to app manage subscriptions in app store

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Submit in app purchase for review for first time

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iOS recurring subscription policy for service, not content

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iPhone In-App Purchase Store Kit error -1003 "Cannot connect to iTunes Store"

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How to set-up In App Purchase free trial period in iOS app

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