---
title: "connect(to:completionHandler:)"
framework: corenfc
role: symbol
role_heading: Instance Method
path: "corenfc/nfcndefreadersession/connect(to:completionhandler:)"
---

# connect(to:completionHandler:)

Connects the reader session to a tag and activates that tag.

## Declaration

```swift
func connect(to tag: any NFCNDEFTag, completionHandler: @escaping @Sendable ((any Error)?) -> Void)
```

```swift
func connect(to tag: any NFCNDEFTag) async throws
```

## Parameters

- `tag`: A tag that the reader session should attempt connecting to.
- `completionHandler`: A handler that the reader session invokes after completing the tag-connect request. The handler has the following parameter: The session calls completionHandler on the dispatch queue provided when creating the doc://com.apple.corenfc/documentation/CoreNFC/NFCNDEFReaderSession.

## Discussion

Discussion A tag stays connected until your app connects to a different tag or restarts polling. Connecting to a tag that is already connected has no effect.