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# UIUpdateInfo

An object that contains detailed information about the current UI update state.

```
@MainActor class UIUpdateInfo
```

## Overview

During a UI update, this object provides details about the state of the update. When using a [`UIUpdateLink`](/documentation/UIKit/UIUpdateLink), you can query this UI update information object to learn about the current UI update.

A UI update can service views on different displays simultaneously, which means these views can have a different [`UIUpdateInfo`](/documentation/UIKit/UIUpdateInfo). Get the UI update information for a specific view using [`current(for:)`](/documentation/UIKit/UIUpdateInfo/current(for:)-34zby) or a specific window using [`current(for:)`](/documentation/UIKit/UIUpdateInfo/current(for:)-6y1z9). The UI update information can also change as the current UI update progresses through its phases.

## Topics

### Getting the current UI update information

[`class func current(for: UIView) -> Self?`](/documentation/UIKit/UIUpdateInfo/current(for:)-34zby)

Returns an object that describes the current UI update state for the specified view.

[`class func current(for: UIWindowScene) -> Self?`](/documentation/UIKit/UIUpdateInfo/current(for:)-6y1z9)

Returns an object that describes the current UI update state for the specified window.

### Getting information about timing

[`var modelTime: TimeInterval`](/documentation/UIKit/UIUpdateInfo/modelTime)

The time interval that represents a reference point for the current time of the UI update.

[`var completionDeadlineTime: TimeInterval`](/documentation/UIKit/UIUpdateInfo/completionDeadlineTime)

The time interval that represents the time by which an app needs to finish submitting changes to the render server.

[`var estimatedPresentationTime: TimeInterval`](/documentation/UIKit/UIUpdateInfo/estimatedPresentationTime)

The time interval that represents an estimate for when current UI update changes become visible onscreen.

### Working with low-latency updates

[`var isImmediatePresentationExpected: Bool`](/documentation/UIKit/UIUpdateInfo/isImmediatePresentationExpected)

A Boolean value that indicates whether the system presents UI updates immediately upon completion.

[`var isLowLatencyEventDispatchConfirmed: Bool`](/documentation/UIKit/UIUpdateInfo/isLowLatencyEventDispatchConfirmed)

A Boolean value that indicates whether the system runs low-latency phases for the UI update.

[`var isPerformingLowLatencyPhases: Bool`](/documentation/UIKit/UIUpdateInfo/isPerformingLowLatencyPhases)

A Boolean value that indicates whether the UI update is in the low-latency phases.

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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