If your iPhone has iOS 14 or later, you can use the built-in NFC (Near Field Communication) reader to scan and interact with NFC tags.

Here's how to use the iPhone readNFC tag:

1. Ensure that NFC is enabled on your iPhone. Go to Settings > NFC and toggle the switch to the on position.

2. Hold your iPhone near the NFC tag to scan it. The tag should be within a few centimeters of the back of your iPhone.

3. Your iPhone will recognize the tag and display a notification on the screen. Tap the notification to open the associated app or action.

4. If the tag is compatible with background tag reading, you don't need to unlock your iPhone to use it. The tag will be automatically read and processed by your iPhone.

5. If the tag requires authentication or you want to view more information about it, you may need to unlock your iPhone first before scanning it.

标签是进步d types of NFC tags that have built-in logic and can perform more complex tasks. Some examples of tags include payment cards, transit cards, and access cards for buildings.

When you scan a tag with your iPhone, the associated app or action will vary depending on the type of tag. For example, if you scan a payment card, you may be prompted to make a payment with the linked account. If you scan a transit card, you may be able to check your balance and reload your account. If you scan an access card for a building, you may be able to unlock doors and access restricted areas.

Keep in mind that not all NFC tags are compatible with the iPhone NFC reader, so you may need to check the compatibility of the individual tag before attempting to use it with your iPhone.