---
title: isValid
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/timer/isvalid
---

# isValid

A Boolean value that indicates whether the timer is currently valid.

## Declaration

```swift
var isValid: Bool { get }
```

## Discussion

Discussion true if the receiver is still capable of firing or false if the timer has been invalidated and is no longer capable of firing.

## See Also

### Retrieving Timer Information

- [fireDate](foundation/timer/firedate.md)
- [timeInterval](foundation/timer/timeinterval.md)
- [userInfo](foundation/timer/userinfo.md)