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# NSAnimation.BlockingMode

These constants indicate the blocking mode of an `NSAnimation` object when it is running.

```
enum BlockingMode
```

## Overview

You specify one of these constants in the [`animationBlockingMode`](/documentation/AppKit/NSAnimation/animationBlockingMode) property.

## Topics

### Constants

[`NSAnimation.BlockingMode.blocking`](/documentation/AppKit/NSAnimation/BlockingMode/blocking)

Requests the animation to run in the main thread in a custom run-loop mode that blocks user input.

[`NSAnimation.BlockingMode.nonblocking`](/documentation/AppKit/NSAnimation/BlockingMode/nonblocking)

Requests the animation to run in a standard or specified run-loop mode that allows user input.

[`NSAnimation.BlockingMode.nonblockingThreaded`](/documentation/AppKit/NSAnimation/BlockingMode/nonblockingThreaded)

Requests the animation to run in a separate thread that is spawned by the `NSAnimation` object.


---

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