---
title: SFSafariViewController.PrewarmingToken
framework: safariservices
role: symbol
role_heading: Class
path: safariservices/sfsafariviewcontroller/prewarmingtoken
---

# SFSafariViewController.PrewarmingToken

## Declaration

```swift
class PrewarmingToken
```

## Topics

### Instance Methods

- [invalidate()](safariservices/sfsafariviewcontroller/prewarmingtoken/invalidate().md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Classes

- [SFSafariViewController.ActivityButton](safariservices/sfsafariviewcontroller/activitybutton.md)
- [SFSafariViewController.DataStore](safariservices/sfsafariviewcontroller/datastore.md)