# UISplitArrangementViewProperties Properties you use to customize how a split arrangement presents a view. ``` @interface UISplitArrangementViewProperties : NSObject ``` ## Overview By default, a split arrangement sizes the primary and secondary views equally when a display has one region. Influence how the arrangement view computes the sizes for each view by setting the split arrangement’s view properties for each placement to use an automatic size, a fixed layout size, a fractional layout size, or an intrinsic content size. First create a [`UISplitArrangement`](/documentation/UIKit/UISplitArrangement-c.class) instance and a [`UISplitArrangementViewProperties`](/documentation/UIKit/UISplitArrangementViewProperties) instance to configure the preferred size: ```objc UISplitArrangement *splitArrangement = [UISplitArrangement splitArrangement]; UISplitArrangementViewProperties *primaryViewProperties = [splitArrangement.defaultViewProperties copy]; ``` Next, create a [`UISplitArrangementDimensionRange`](/documentation/UIKit/UISplitArrangementDimensionRange) instance, and configure the [`minimum`](/documentation/UIKit/UISplitArrangementDimensionRange/minimum), [`preferred`](/documentation/UIKit/UISplitArrangementDimensionRange/preferred), or [`maximum`](/documentation/UIKit/UISplitArrangementDimensionRange/maximum) properties with [`UISplitArrangementDimension`](/documentation/UIKit/UISplitArrangementDimension) options to describe how to size the view. The following example sets a preferred fractional layout size with an absolute minimum: ```objc UISplitArrangementDimensionRange *primaryDimensionRange = [[UISplitArrangementDimensionRange alloc] init]; primaryDimensionRange.minimum = [UISplitArrangementDimension absoluteDimension:250.0]; primaryDimensionRange.preferred = [UISplitArrangementDimension fractionalDimension:0.3]; ``` Then, set the `width` or `height` property on the view properties instance to the configured [`UISplitArrangementDimensionRange`](/documentation/UIKit/UISplitArrangementDimensionRange), set the view properties on the split arrangement for the view’s placement, and update the arrangement view controller to use the split arrangement by calling the [`updateArrangement:animated:`](/documentation/UIKit/UIArrangementViewController/updateArrangement:animated:) method: ```objc primaryViewProperties.width = primaryDimensionRange; [splitArrangement setViewProperties:primaryViewProperties forPlacement:UIArrangementViewControllerViewPlacementPrimary]; [arrangementVC updateArrangement:splitArrangement]; ``` ## Topics ### Creating view properties [`- (instancetype) init;`](/documentation/UIKit/UISplitArrangementViewProperties/init) Creates a set of split arrangement view properties. ### Configuring the view [`@property (nonatomic, copy) UISplitArrangementDimensionRange * width;`](/documentation/UIKit/UISplitArrangementViewProperties/width) The width dimension range for the view. [`@property (nonatomic, copy) UISplitArrangementDimensionRange * height;`](/documentation/UIKit/UISplitArrangementViewProperties/height) The height dimension range for the view. [`@interface UISplitArrangementDimensionRange : NSObject`](/documentation/UIKit/UISplitArrangementDimensionRange) A range of dimensions defining the minimum, preferred, and maximum size for a view within a split arrangement. [`@property (nonatomic) CGFloat layoutPriority;`](/documentation/UIKit/UISplitArrangementViewProperties/layoutPriority) The layout priority of the view within the split arrangement. ## Relationships ### Inherits From [`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class) ### Conforms To [`NSCopying`](/documentation/Foundation/NSCopying) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)