---
title: "extensionViewController(signers:)"
framework: mailkit
role: symbol
role_heading: Instance Method
path: "mailkit/memessagesecurityhandler/extensionviewcontroller(signers:)"
---

# extensionViewController(signers:)

Returns a view controller that displays details about a message’s digital signature.

## Declaration

```swift
func extensionViewController(signers messageSigners: [MEMessageSigner]) -> MEExtensionViewController?
```

## Parameters

- `messageSigners`: An array that contains details about who signed the message.

## Return Value

Return Value A view controller that users can display to see information about a message’s digital signature.