A custom description that helps users understand how they can use NFC reader mode in your app.
- iOS 11.0+
- Mac Catalyst 13.0+
- Core NFC
Before you call
begin, use this property to supply a string that provides more context about how your app uses NFC reader mode. For example, you might tell users "Hold your iPhone near the item to learn more about it." When tag scanning begins, your text is displayed to users in an alert. Note that the
alert string is different from the purpose string you supply for the NFCReaderUsageDescription key in your
If you configure your NFC NDEF reader session to read multiple tags, you can update
alert to display different information after each tag is read (you can update this string in any thread context while the reader session remains valid).