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# isInterruptible

A Boolean value indicating whether the animator is interruptible and can be paused or stopped.

```
var isInterruptible: Bool { get set }
```

## Discussion

When the value of this property is <doc://com.apple.documentation/documentation/Swift/true>, you can use the [`pauseAnimation()`](/documentation/UIKit/UIViewAnimating/pauseAnimation()) and [`stopAnimation(_:)`](/documentation/UIKit/UIViewAnimating/stopAnimation(_:)) methods to interrupt the animations and make changes. When the value of this property is <doc://com.apple.documentation/documentation/Swift/false>, the animations run to completion (and without interruption) after you call the [`startAnimation()`](/documentation/UIKit/UIViewAnimating/startAnimation()) method. If you use a view property animator object to implement an interruptible view controller transition, this property must be <doc://com.apple.documentation/documentation/Swift/true>.

It is a programmer error to change this property if the animator’s [`state`](/documentation/UIKit/UIViewAnimating/state) property is not set to [`UIViewAnimatingState.inactive`](/documentation/UIKit/UIViewAnimatingState/inactive).

---

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