To prevent potential security issues stemming from background tag reading, explicit user action is required before the system passes any collected NFC data to an app. If iPhone is locked, the system prompts the user to unlock the phone before providing the tag data to the app.īackground Tag Reading can read NDEF-formatted tags of type 1 to 5. After the user taps the notification, the system delivers the tag data to the appropriate app. The system displays a pop-up notification each time it reads a new tag. On iPhones that support Background Tag Reading, the system scans for and reads NFC data without requiring users to scan tags using an app. Introducing Background Tag ReadingĪs highlighted in the “What’s New in Core NFC” video available on Apple’s developer site, the Core NFC framework has introduced a brand-new feature, called Background Tag Reading.Ī developer document explains how the feature works: The new iPhone Xs and Xs Max, as well as a colorful family of the new iPhone Xr handsets, include advancements in near-field communication (NFC) technology that allow the handsets to automatically read nearby NDEF (NFC Data Exchange Format) tags and send any collected assets to appropriate apps without needing to open any specific app beforehand.īefore this change, users were required start an NFC reader session from an app.
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