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# perform(_:performanceTime:)

Initiates a specific pattern of haptic feedback to the user.

```
func perform(_ pattern: NSHapticFeedbackManager.FeedbackPattern, performanceTime: NSHapticFeedbackManager.PerformanceTime)
```

## Parameters

`pattern`

A pattern of feedback to be provided to the user. For possible values, see [`NSHapticFeedbackManager.FeedbackPattern`](/documentation/AppKit/NSHapticFeedbackManager/FeedbackPattern).

`performanceTime`

The time when the feedback should be provided to the user. For possible values, see [`NSHapticFeedbackManager.PerformanceTime`](/documentation/AppKit/NSHapticFeedbackManager/PerformanceTime).

## Discussion

In some cases, the system may override a call to this method. For example, a Force Touch trackpad won’t provide haptic feedback if the user isn’t touching the trackpad.

> Important:
> Call this method only in response to user-initiated actions. Ideally, visual feedback, such as a highlight or appearance of an alignment guide, should accompany the feedback.

## See Also

[`NSHapticFeedbackManager.PerformanceTime`](/documentation/AppKit/NSHapticFeedbackManager/PerformanceTime)

A time at which to provide haptic feedback to the user.

[`NSHapticFeedbackManager`](/documentation/AppKit/NSHapticFeedbackManager)

An object that provides access to the haptic feedback management attributes on a system with a Force Touch trackpad.

[`NSHapticFeedbackManager.FeedbackPattern`](/documentation/AppKit/NSHapticFeedbackManager/FeedbackPattern)

A pattern of haptic feedback to be provided to the user.


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