# UIAspectRatioConstraint

Roblox Engine API class from Roblox Studio 0.744.0.7441077 (version-7aaa6838d36c4448).

- Inherits from, nearest first: [UIConstraint](https://rapi.sleaze.dev/classes/UIConstraint.md), [UIComponent](https://rapi.sleaze.dev/classes/UIComponent.md), [UIBase](https://rapi.sleaze.dev/classes/UIBase.md), [Instance](https://rapi.sleaze.dev/classes/Instance.md), [Object](https://rapi.sleaze.dev/classes/Object.md)
- Memory category: Instances
- HTML page: https://rapi.sleaze.dev/classes/UIAspectRatioConstraint/
- Roblox documentation: https://create.roblox.com/docs/reference/engine/classes/UIAspectRatioConstraint

Ensures the parent UI element maintains a particular aspect ratio.

## Properties

### AspectRatio

```luau
UIAspectRatioConstraint.AspectRatio: number = 1
```

- Tags: Read capabilities: UI

Determines the width-to-height ratio to maintain.

### AspectType

```luau
UIAspectRatioConstraint.AspectType: Enum.AspectType = Enum.AspectType.FitWithinMaxSize
```

- Tags: Read capabilities: UI

Determines how the maximum size of the object is limited.

### DominantAxis

```luau
UIAspectRatioConstraint.DominantAxis: Enum.DominantAxis = Enum.DominantAxis.Width
```

- Tags: Read capabilities: UI

Determines the axis to use when setting the new size of the object.

## Inherited members

- From [Instance](https://rapi.sleaze.dev/classes/Instance.md): `Archivable`, `archivable`, `Attributes`, `AttributesReplicate`, `AttributesSerialize`, `HistoryId`, `Name`, `Parent`, `PredictionMode`, `PropertyStatusStudio`, `RobloxLocked`, `SerializedOverrides`, `SourceAssetId`, `Tags`, `UniqueId`, `numExpectedDirectChildren`, `DataCost`, `Capabilities`, `DefinesCapabilities`, `IsInSandbox`, `Sandboxed`, `AddTag`, `ClearAllChildren`, `Clone`, `Destroy`, `FindFirstAncestor`, `FindFirstAncestorOfClass`, `FindFirstAncestorWhichIsA`, `FindFirstChild`, `FindFirstChildOfClass`, `FindFirstChildWhichIsA`, `FindFirstDescendant`, `GetActor`, `GetAttribute`, `GetAttributeChangedSignal`, `GetAttributes`, `GetChildren`, `GetDebugId`, `GetDescendants`, `GetFullName`, `GetStyled`, `GetStyledPropertyChangedSignal`, `GetTags`, `HasTag`, `IsAncestorOf`, `IsDescendantOf`, `IsPropertyModified`, `QueryDescendants`, `RemoveTag`, `ResetPropertyToDefault`, `SetAttribute`, `WaitForChild`, `Remove`, `children`, `clone`, `destroy`, `findFirstChild`, `getChildren`, `isDescendantOf`, `remove`, `AncestryChanged`, `AttributeChanged`, `ChildAdded`, `ChildRemoved`, `DescendantAdded`, `DescendantRemoving`, `Destroying`, `StyledPropertiesChanged`, `childAdded`
- From [Object](https://rapi.sleaze.dev/classes/Object.md): `ClassName`, `className`, `GetPropertyChangedSignal`, `IsA`, `isA`, `Changed`